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121 Geospatial Technologies in Agriculture ABS-130

Geospatial-Based Farmer Land Mapping Information System in Gowa Regency
Ahmad Munir (a*), Ainun Ayu Lestari (b)

a) Department of Agrotechnology Faculty of Agriculture Hasanuddin University, Jalan Perintis Kemerdekaan KM. 10 Tamalanrea Makassar 90245, Indonesia
*amunir1963[at]gmail.com
b) Doctoral Program Postgraduate Hasanuddin University, Jalan Perintis Kemerdekaan KM. 10 Tamalanrea Makassar 90245, Indonesia


Abstract

A lot of data and information on land resources have been provided, the challenge is finding ways to: (i) the data and information are available sustainably, updated periodically, and can be accessed quickly and easily, (ii) the wider community is aware of its existence and understands its contents accordingly. with the need, (iii) increase the added value of data as a source of data and other information, and (iv) become a reference in spatial policies in the field of land resources and regional development. The four challenges were answered by building and developing an internet-based geospatial information system. The Geographic Information System (GIS) for mapping agricultural commodities and climate information is one means of displaying data on the distribution of agricultural land, rainfall, temperature, location of sub-districts, villages, and land owners for the Gowa Regency area. These recommendations were prepared with the help of information based on geographic mapping. Further development of GIS applications also leads to WEB-based applications, which are better known as WebGIS. Web-GIS is a combination of graphic mapping design, digital maps with geographic analysis, computer programming, and a database that is interconnected into one part of web design and web mapping. The need for the existence and provision of complete, accurate, fast and accountable data and information in an effort to manage and optimize the potential and utilization of agricultural resources in the Gowa district, especially for village farmer groups and also encourage the interest of potential investors in choosing and making choices. invest, it is deemed necessary to have a WEB-based GIS application. The research method used is data collection, interviews, and observations as well as analyzing software requirements, using the phpmyadmin database, testing the program as the final stage in making a web-based geographic information system. The results of the design are in the form

Keywords: Agriculture, Farmer Groups, Application Modeling, Regional Resources, Livelihoods, WebGIS

Share Link | Plain Format | Corresponding Author (Ainun Ayu Lestari)


122 Geospatial Technologies in Agriculture ABS-136

Machine Learning Application for Identifying The Agricultural Land Use Change to Support Regional Food Security Estimation in Southern Area of Kulon Progo
Bangkit Fatwa Pratama, Liana Ni^Mathus Sholikah, Zulfa Khoirun Nisa, Ansita Gupitakingkin Pradipta, Ngadisih, Sahid Susanto, Akram Sripandam Prihanantya, Rose Tirtalistyani, and Sigit Supadmo Arif

Department of Agricultural and Biosystems Engineering, Faculty of Agricultural Technology, Universitas Gadjah Mada

Department of Geodetic Engineering, Faculty of Engineering, Universitas Gadjah Mada


Abstract

Population and the massive construction of public facilities increased land demand. The southern region of Kulon Progo is one area that has experienced a lot of land conversion due to population growth, the construction of the New Yogyakarta International Airport (NYIA), and the construction of Southern Cross Road (JJLS). The purpose of this study was to determine the conversion rate of land in the form of paddy fields to the condition of food security and to predict the limit of food self-sufficiency (rice) based on the availability of paddy fields in the southern area of Kulon Progo. Identification of land-use change was carried out using the Google Earth Engine (GEE) platform based on five land cover classes: water bodies, paddy fields, vegetation, built-up land, and open land with variations in 2005, 2010, 2015, and 2020. Data processing was conducted gradually, including composite image process, NDVI calculation process, supervised classification, field validation, calculation of food security based on food production, and prediction of food self-sufficiency limit in rice. This study revealed the rate of conversion of paddy fields in the period 2005-2010, 2010-2015 was 45.43 ha/year, -79.90 ha/year, and in the 2015-2020 period, there was a significant increase to 85, 81 ha/yr due to new paddy fields. The research locations were in food-secure conditions for the four sub-districts, namely Galur, Panjatan, Wates, and Temon in 2005, 2010, 2015, and 2020, except for Wates in 2005 showed food insecurity conditions. Prediction of food self-sufficiency limit in the form of rice may occur in the next 48,48 years (2068) with an available agricultural land area of 1345,04 ha. The consideration used was the availability of food only comes from the research area. Besides, there is no effort to increase the intensification or extensification of paddy fields. Another assumption was the rate of conversion of agricultural land and population growth is constant.

Keywords: machine learning, agriculture, land use, change, food security

Share Link | Plain Format | Corresponding Author (Ansita Gupitakingkin Pradipta)


123 Geospatial Technologies in Agriculture ABS-149

The projected free aflatoxin disease of future peanut cropping areas in Australia
Haerani haerani, Armando Apan, Badri Basnet

Universitas Hasanuddin
The University of Southern Queensland


Abstract

Climate holds an important role in determine the growth and distribution of species, including peanut crops and one of their disease, namely aflatoxin. Unfortunately climate is changing, and as with other species, this changing could affect the distributions of peanut and aflatoxin in the future. In this study, we aimed to locate the projected peanut cropping areas in Australia which have a risk of aflatoxin invasion in the future. We overlaid the results of previous studies on the projections of peanut crops and aflatoxin distributions in 2030, 2050, 2070, and 2100. These previous studies employed CLIMEX model based on Global Climate Model (GCMs) of CSIRO-Mk3.0 and MIROC-H under SRES A-2 climate change scenarios. The map overlay results between the future projections of aflatoxin and peanut crops resulted in small areas of low aflatoxin risk in the future projected areas of peanut crops. It is projected that most of the current peanut cultivation areas will have a high aflatoxin risk, while others will no longer be favourable for peanut cultivation in the future.

Keywords: climate change, peanut, aflatoxin, climate model

Share Link | Plain Format | Corresponding Author (Haerani Haerani)


124 Post-harvest Technology ABS-37

An Overview of Fine Robusta
Monika Linda (a), Februadi Bastian (a*), Meta Mahendradatta (a)

a) Department of Food Science and Technology, Hasanuddin University, Makassar 90245, Indonesia
*februadi[at]unhas.ac.id


Abstract

Robusta coffee (Coffea canephora) is a kind of coffee that is historically considered to have a much lower quality that the kind of coffee the other. The process of processing post-harvest is one of the factors causing the low quality of coffee robusta it. Fine robusta is the name for robusta coffee which has a quality score goals flavors are superior. Fine robusta is obtained through the processing of post- harvest with procedures that are good and true. Fine Robusta has several criteria such as green bean colored blue-green, form of seed-free disability, scent-free of odors foreign, the size of the seeds were uniform, and have the results cupping test which recorded ten attributes of flavor with a value of >8 (fine). The article is intended to provide information about the latest on the processing of robusta coffee which has a value ideals taste superior to what is called the fine robusta.

Keywords: Fine robusta, the processing of fine robusta, post-harvest robusta coffee

Share Link | Plain Format | Corresponding Author (Monika Linda)


125 Post-harvest Technology ABS-41

Passive Drying Of Porang Tuber Slices (Amorphophallus oncophyllus)
Syamsinar Rahmia (1), Junaedi Muhidong (2), Salengke (3), Amran Laga (4)

Universitas Hasanuddin, Jl. Perintis Kemerdekaan KM 10 Makassar 90245, South Sulawesi, Indonesia.


Abstract

Drying is an essential process for food preservation by reducing food losses of agricultural products. Porang tubers are one of the potential food product that have a high economic value and many various benefits for the food industry. The commercial product of porang tubers is slices dried or chipss dried. Passive drying mechanism that utilizes sunlight in the drying chamber with a natural airflow mechanism. The tool used is a direct passive solar box dryer. It is a small box made up of plywood, with a transparent cover on it. Direct type passive drying is a drying machine in the drying chamber with an airflow mechanism where direct sunlight enters the drying chamber. The drying process is carried out by placing the sample at the top, middle, and bottom of the drying chamber with used a size of slices are 2x2x0.8 cm. The objectivity of thus study was to determine the drying characteristic of porang tuber slices and to fitting of suitable drying model. The methods using the pre-drying treatment is non-blanching and blanching with 60 Celcius temperature control. The simplest method for blanching is immersion for a few minutes in boiling/near-boiling water used water bath. Three drying models using for evaluated compatibility are Newton, Henderson & Pabis, and Page. The results of the analysis showed that the value of moisture content in porang slices was 6.07% (wet basis) and 4.72% (wet basis) with a total drying time of 1680 minute, respectively. Page model with the equation of Moisture Ratio {MR = exp (-kt^n)} is the most suitable model for the blanching method of temperature control 60 Celcius. The constanta value of Page equation is obtained as follows: k = 0.002624, n = 1.101326, and R2 = 0.997551.

Keywords: Porang tuber slices, page model, blanching, passive solar drying, moisture content.

Share Link | Plain Format | Corresponding Author (Syamsinar Rahmia)


126 Post-harvest Technology ABS-46

Performance of the Ohmic Reactor with Fuzzy Expert Control System
Ayla Ainayyah M (a*), Dr. Ir. Abdul Waris, MT. (b), Prof. Dr. Ir. Ahmad Munir, M. Eng. (c)

Departemen Teknologi Pertanian, Fakultas Pertanian, Universitas Hasanuddin, Makassar, Sulawesi Selatan, Indonesia


Abstract

The heating process is a technique for preserving and processing foodstuffs. One of the methods that can be used is ohmic heating method. Ohmic reactors system today on the less optimal of the ohmic reactor performance so that additional control system is required for the ohmic reactor. The purpose of this research is to produce a fuzzy expert control system in the ohmic reactor to optimalize the performance of the ohmic reactor. This research conducted by creating hardware and software. The test used a salt solution at a concentration of 1%, 2%, 3%, 4% as the test material. Heating is carried out at each solution concentration. The analysis result of the temperature response showed that the fuzzy expert control system in the ohmic reactor is operating well. This can be seen from the overshoot of the solution temperature only at a concentration of 4% of 2 &#8451- for 4 seconds while in fuzzy logic showed an overshoot of 3 &#8451- for 2 seconds. In addition, the setting time to reach the setting point was relatively small and the solution temperature was relatively stable. The fuzzy expert and fuzzy logic control systems have low steady state errors ranging from 1,1% and 2,2%. Meanwhile, the analysis results of the temperature response in the on-off control system do not meet the criteria for the success performance control due to overshoot, unstable solution temperature and large steady state errors in each solution concentrations. The used energy analysis found that the electrical energy used by fuzzy expert control system was 49169,2 Watt.s and fuzzy logic was 45121,5 Watt.s.

Keywords: Ohmic reactor- Fuzzy expert- Energy

Share Link | Plain Format | Corresponding Author (Ayla Ainayyah M)


127 Post-harvest Technology ABS-47

Improving Indonesian Coffee Quality Through Accurate Predictions of Coffee Beans Moisture Content Based on the Bioelectrical Properties and Artificial Neural Networks
Nazhif Ubaidillah (a), Hanna Fauziah Habibah (b) ,Wahyu Dwi Ristianingrum (b) , Intan Salsabila Putri (c) , Muhammad Hafizh Oktasa (b) Dimas Firmanda Al Riza (b*)

a)Environmental Engineering, Faculty of Agricultural Technology, Universitas Brawijaya, Jl. Veteran, Malang, Indonesia
b*)Agricultural Engineering and Biosystem, Faculty of Agricultural Technology, Universitas Brawijaya, Jl. Veteran, Malang, Indonesia
*dimasfirmanda[at]ub.ac.id
c) Biotechnology, Faculty of Agricultural Technology, Universitas Brawijaya, Jl. Veteran, Malang, Indonesia


Abstract

Indonesia is one of the major coffees producing country and currently known as the fourth largest coffee beans exporters. Along with the increasing of the coffee export quantity, the quality control is required to improve the marketable quality and competitiveness. There are several quality attributes required for green coffee beans to be able to be exported. Coffee quality commonly characterized by the proportion of the detective beans, moisture content, sensory properties, and also physical and chemical properties. The methods to evaluate these properties are varied. Among these properties, moisture content is important to ensure long storage time. The methods to measure content varies from destructive measurement to non-destructive measurement method. Spectroscopy based method, bioelectric, and other approach has been used to measure the moisture content. The prediction model that could be used also has a trend from a regular statistical model into machine learning or artificial intelligent methods. The advancement of hardware and software for instrumentation will enable easier and cheaper technology to provide measurement device widely for the farmer and other stakeholder. This method increases speed and accuracy in the measurement of coffee moisture content . This paper will give an insight into the current state of the green coffee bean quality evaluation method and the possibility to improve and implement appropriate technology that is needed by all stakeholders.

Keywords: Artificial Neural Network, Bioelectrical Properties, Coffee Beans, Moisture Content

Share Link | Plain Format | Corresponding Author (Nazhif Ubaidillah)


128 Post-harvest Technology ABS-60

Post Harvest Management in Reducing Aflatoxin Content in Nutmeg
Risma Fira Suneth 1 , Wahid 1 , Rosniyati Suwarda 1

Maluku Assessment Institute of Agricultural Technology


Abstract

Indonesian nutmeg has aflatoxin levels above European Union standards, namely B1 6.4 - 120 mikrogram/kg and total aflatoxins of 10.1 - 140 mikrogram/kg. Many factors cause Aspergillus flavus contamination such as mixing old and young nutmeg, sanitation, drying places and storing places for nutmeg. This study aims to obtain a technology package to reduce aflatoxins in nutmeg. This study used a completely randomized factorial design with 3 treatment factors, namely shell-free drying (A1), shell-drying (A2), combination of liquid smoke + clove leaf flour(B1), Liquid smoke + bitter leaf flour and (B2), Storage duration of 1 month (C1), storage duration of 2 months (C2), storage duration of 3 months (C3) then repeated 3 times. The results showed that the moisture content of nutmeg with a combination of treatments for each factor with 1 month of storage was 1.4%, 2 months of storage was 10.2% and 3 months of storage was 11%. Aflatoxin B1 contamination <3.86 mikrogram/kg, B2 <1.11 mikrogram/kg, G1 <3, 86 mikrogram/kg and G2 <1.11 mikrogram/kg and the total aflatoxin was <9.94 mikrogram/kg. The Proximate test shows the test value of fat 32.09, protein 5.54, carbohydrates 47 and ash 1.46. The test for the presence of negative foreign objects on the results of treatment of nutmeg seeds with vegetable ingredients. A drying technology package and the use of vegetable ingredients can be recommended to reduce aflatoxin contamination.

Keywords: Aflatoxin, Liquid smoke, Nutmeg

Share Link | Plain Format | Corresponding Author (Risma Fira Suneth)


129 Post-harvest Technology ABS-71

The Improvement of Fish Handling Method at Fish Landing and Auction for the Better Fish Quality and Safety
D Dwiyitno, S Wibowo, and L Assadad

Research Center for Marine and Fisheries Product Processing and Biotechnology
Jl. KS Tubun Petamburan VI, Jakarta 10260 Indonesia


Abstract

Improper facilities and handling methods at the fish landing and auction may contribute to reducing fishery product quality and safety due to environmental contaminants. A study on the improvement of fish handling and auction method has been conducted at Blanakan fish landing and fish auction in Subang, West Java. The improved method included a cold chain system and hygiene practices, which were compared to the conventional method. In order to evaluate the introduced method, a number of parameters on fish samples were observed, i.e. physicochemical, microbiological, and sensory properties based on the load tracking method. The result showed that the application of flake ice (1:1) on the plastic basket during auction produced the better fish quality (black pomfret/Formio niger and bigeye/Priacanthus sp) in comparison to the conventional method (without icing and in a bamboo basket). The total plate count (TPC) of fish from the improved method was 6.0x104 and 6.9x104 cfu/g, lower than that of the conventional method (3.0x105 and 5.1x105 cfu/g). Similarly, the total volatile base (TVB) of improved fish was 5,63-7,00 mg%N, much lower than that of the conventional method (12,20-18,70 mg%). Further sensory analysis showed a similar trend that improved method produced better fish sensory, especially on flesh texture, gill appearance, odor, and slimness. However, there was no significant difference in the pH value of fish between the improved and conventional methods.

Keywords: fish handling- load tracking- fish landing- fish quality- cold chain system

Share Link | Plain Format | Corresponding Author (dwiyitno dwiyitno)


130 Post-harvest Technology ABS-84

A Mini Review of Infrared Radiation for Exotic Fruits Handling: Case Study of Duku (Lansium domesticum corr.)
Laila Rahmawati (a*) Hari Hariadi (a)

a) Research Center for Appropriate Technology, Indonesian Institute of Sciences, Subang, West Java, 41213, Indonesia

*laila.rahmawati53[at]gmail.com / lail004[at]lipi.go.id


Abstract

The exotic fruits are seasonal have a short shelf life and are relatively easy to attack by microbes. The exotic fruits are also different from sub-tropical fruit which needs special treatment to prolong their shelf life. An attempt of handling duku fruits by using infrared radiation was developed. It was aimed to create the shell likeness of duku^s peel then that condition could minimize the physical properties and chemical changing damage. In order to understand the infrared radiation method for handling the exotic fruit, this mini-review would develop an improved understanding of the infrared radiation method especially for the mechanism, and the final results are discussed.

Keywords: Infrared radiation- exotic fruit- post-harvest- duku

Share Link | Plain Format | Corresponding Author (Laila Rahmawati)


131 Post-harvest Technology ABS-86

A computer vision method to characterize the types of coffee beans based on color and texture analysis
Yusuf Hendrawan (a*), Bagas Rohmatulloh (a), Muchammad Riza Fauzy (b), Retno Damayanti (a), Mochamad Bagus Hermanto (a), Dimas Firmanda Al Riza (a), Sandra (a)

a) Laboratory of Mechatronics and Agro-industrial Machineries, Department of Agricultural Engineering, Universitas Brawijaya, Jl. Veteran, Malang, ZIP 65145, Indonesia
*yusuf_h[at]ub.ac.id
b) Department of Industrial Engineering, Universitas Merdeka, Jl. Terusan Raya Dieng 62-64, Malang, ZIP 65146, Indonesia


Abstract

Several types of local Indonesian coffee have been recognized in the international market. The gap in coffee prices triggers the occurrence of counterfeiting of famous coffee products. Therefore, it is necessary to develop a non-destructive system that can recognize the external appearance characteristics of each type of coffee bean. This study aimed to develop a computer vision system to characterize three types of Indonesian Arabica coffee beans i.e. Gayo Aceh, Kintamani Bali, and Toraja Tongkonan based on the external appearances. Each type of coffee bean was analyzed for its characteristics based on color and textural features. Color features included the average value of red, green, blue, grey, hue, saturation(HSL), saturation(HSV), lightness, value, X(XYZ), Y(XYZ), Z(XYZ), C(CMY), M(CMY), Y(CMY), C(CMYK), M(CMYK), Y(CMYK), K(CMYK), L(Lab), a(Lab), b(Lab), C(LCH), H(LCH), U(LUV), and V(LUV). Textural features included energy, entropy, contrast, homogeneity, inverse difference moment, correlation, sum-mean, variance, cluster tendency, and maximum probability on every type of color space. From the features extraction, a total of 286 types of image features were analyzed. The results showed that 19 features of 26 color features and 185 features of 260 textural features had the potential to characterize and classify three types of coffee beans. Of the total 286 image features, the three image features which were recommended to have the best performance with the smallest and most stable standard deviations i.e. X(XYZ) sum-mean (average standard deviation 0.01186), Y(XYZ) sum-mean (average standard deviation 0.01187), and Z(XYZ) sum-mean (standard deviation 0.01419).

Keywords: coffee bean- characterization- color- computer vision- texture

Share Link | Plain Format | Corresponding Author (Yusuf Hendrawan)


132 Post-harvest Technology ABS-115

The effect of various prohibited methods of preservation on the color, texture, and microbiological quality of chicken breast meat (pectoralis mayor) during storage
P W Nastiti1, b), N Bintoro 2, a), J K N Karyadi 2, S Rahayoe 2

1) Doctoral Student of Department of Agricultural Engineering and Biosystem, Faculty of Agricultural Technology, Gadjah Mada University, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia.
2) Department of Agricultural Engineering and Biosystem, Faculty of Agricultural Technology, Gadjah Mada University, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia.


Abstract

Prohibited chemical substances are often used for preserving chicken meat which may have an adverse effect on consumer health. This study aimed to investigate the effect of formalin and boric acid application on texture, color, and microbial quantity of broiler breast meats during storage. Skinned meats were bought from a local market in Yogyakarta and treated by adding formalin 10 percent, boric acid 10 percent, and no treatment before being stored unpacked at ambient room temperature (27 to 33 oC). The untreated sample was also stored in the refrigerator (0 to 4 oC) to represent the commonly practiced preservation method. The texture was analyzed by using Universal Testing Machine (UTM). The color measured by Chromameter Minolta 4000 and total plate count (TPC) were using spread plate approaches. All measurements were carried out every 6 hours interval up to 24 hours storage period. The results indicated that color lightness (L) of the sample decreased gradually for all treatments but not for a (redness) and b (yellowness) with the increasing storage time. The lightness was a significant difference for formalin-treated samples compare to all other treatments. The storage time and preservation method influenced meat texture significantly(sig less than 0.05). This finding informed that the formalin chemical preservation on the broiler meat sample would cause a high value of lightness and texture. Refrigerator storage delayed microbial growth. Untreated samples at the ambient temperature showed the highest microbial total count (cfu per ml) throughout storage time and were higher than the sample stored in the refrigerator. No microbial growth appeared in the samples subjected to formalin 10 percent. TPC was only found in boric acid-treated samples at 18 h and 24 h storage. This is possible to use color and texture attributes combined with TPC results to detect the prohibited chemicals present on the chicken breast meat.

Keywords: broiler meat, color, texture, TPC, preservation

Share Link | Plain Format | Corresponding Author (Pramilih Wahyu Nastiti)


133 Post-harvest Technology ABS-119

Response Surface Methodology: A review on its application in fermentation process
Emmy Sopacua, Andi Dirpan, Adiansyah Syarifuddin.

Department of Food Science and Technology, Hasanuddin University.


Abstract

A well-handled post-harvest product will be able to produce a quality final product. This is especially important for products that go through the fermentation process where several internal and external factors become determinants of success / optimization of desired results. Improper handling of the fermentation process can detrimentally impact the end product leaving it damaged and unable to be consumed. Response Surface method (RSM) can be a way to utilize statistically assisted experimental designs to find the optimal value of a response. This article will provide a summary of several post-harvest fermentation products that use RSM experimental design as a method to gain optimal response, where this method is efficient to predict the level points on the factor (variable independent).

Keywords: Response Surface Method, post-harvest, fermentation

Share Link | Plain Format | Corresponding Author (Emmy Ivone Sopacua)


134 Post-harvest Technology ABS-133

ResNet-50 to Classify the Types of Indonesian Local Coffee Beans
Muhammad Aji Alrasyid (a), Bagas Rohmatulloh (b), Retno Damayanti (b), Dimas Firmanda Al Riza (b), Mochamad Bagus Hermanto (b), Sandra (b), Yusuf Hendrawan (b*)

a) Department of Statistics, Faculty of Mathematics and Science, Universitas Brawijaya, Malang, Indonesia
b) Department of Agricultural Engineering, Faculty of Agricultural Technology, Universitas Brawijaya, Malang, Indonesia
*yusuf_h[at]ub.ac.id


Abstract

A technology is needed to distinguish the types of Indonesian local coffee beans to prevent product counterfeiting. One method for detecting agricultural product varieties is computer vision. This study aimed to classify three types of Indonesian Arabica coffee beans i.e. Gayo Aceh, Kintamani Bali, and Toraja Tongkonan using computer vision. The classification method used was the ResNet-50 convolutional neural network with sensitivity analysis using several variations of the optimizer such as SGDm, Adam, and RMSProp, as well as the learning rate of 0.00005 and 0.0001. Each type of coffee used 500 data for training and validation with the distribution of 70% training and 30% validation. ResNet-50 model using the RMSProp optimizer at a learning rate value of 0.00005 can be recommended for several reasons i.e. the training process was more stable with little fluctuations, had the highest value of validation accuracy of 100%, and highest testing accuracy of 99.6%.

Keywords: classification- coffee beans- CNN- ResNet-50

Share Link | Plain Format | Corresponding Author (Yusuf Hendrawan)


135 Post-harvest Technology ABS-135

Characterization Of Cacao Beans Of Sulawesi 2 (S2) Clone From Pinrang Regency, South Sulawesi
Nur Laylah1,2 a), S.Salengke3, b), A.Laga4, c), Supratomo3, d)

1Agriculture Study Program, Graduate School Hasanuddin University Makassar - Indonesia
2State Agricultural Polytechnies Pangkep, Indonesia
3Department of Agricultural Engineering, Hasanuddin University, Makassar-Indonesia
4Department of Food Technology Science, Hasanuddin university, Makassar-Indonesia
a)nurlaylaharifin[at]yahoo.co.id
b)ssalengke[at]yahoo.co.id
c)amranlaga[at]gmail.com
d)spratomo[at]yahoo.co.id


Abstract

Abstract. Cocoa beans is an important commodity for Indonesia since it contributes to foreign exchange of the country. In Indonesia , Sulawesi is the most important cocoa producing region and Sulawesi 2 (S2) clone is one of the most planted cocoa in Indonesia. This study aimed at characterizing the beans of the S2 clone at three levels of maturity. The parameters measured were moisture content , bean weight and pulp weight . The results indicate that pulp moisture content ranged from 78.32 - 81.34%. Seed moisture content ranged from 42.76 - 44.43 %, seed weight ranged from 54.19 - 59.22%, and pulp weight ranged from 41.03 - 46.42 %.

Keywords: Clones, Cocoa, fruit, characteristics.

Share Link | Plain Format | Corresponding Author (NUR LAYLAH -)


136 Renewable energy ABS-36

Biomass and Lipid Production of newly isolated tropical marine microalgae Nannochloropsis sp.UHO3 and Skeletonema sp.UHO29 in outdoor raceway ponds
Indrayani Indrayani1*, Haslianti Haslianti2, Asmariani Asmariani3, Ardiansyah4

1Study Programme of Agricultural Technology Education, Faculty of Engineering, University Negeri Makassar, Parangtambung Campus, Makassar 90224, South Sulawesi, Indonesia-
2 Department of Fisheries Products Technology, Faculty of Fisheries and Marine Sciences, University of Halu Oleo, Kendari 93232, Southeast Sulawesi, Indonesia-
3 Fisheries Laboratory, Faculty of Fisheries and Marine Sciences, University of Halu Oleo, Kendari 93232, Southeast Sulawesi, Indonesia-
4 Aquaculture Department, Agricultural Polytechnic State of Pangkep, Makassar-ParePare Km. 83, South Sulawesi, Indonesia-


Abstract

The microalgae Nannochloropsis sp.UHO3 and Skeletonema sp.UHO29 are newly isolated marine microalgae from coastal areas in Kendari, Southeast Sulawesi Indonesia. Indoor studies of the microalgae showed potential as biodiesel feedstock due to their high growth rates and high biomass and lipid productivity. However, for commercial uses especially for biodiesel feedstock, the species should have the ability to perform well under real outdoor conditions. The aim of this study was to determine growth, biomass and lipid productivity of the Nannochloropsis sp. UHO3 and Skeletonema sp.UHO29 in outdoor raceway ponds. The species were cultured using 1m2 raceway ponds. The two species were cultured using sea water based media enriched with f / 2 nutrients for Skeletonema sp. and Walne media for Nannochloropsis sp. Cultures were initially operated in batch mode until it reached the stationary phase. After that the culture is operated in a semi-continuous mode by harvesting part of the culture then adding new media as much as the volume of culture that is harvested. Cultures were maintained for about 3 months. The results of this study showed that the two species of microalgae have the ability to grow well in outdoor raceway ponds. The specific growth rate of Nannochloropsis sp.UHO3 ranged from 0.105 to 0.447 d-1 while the specific growth rate of Skeletonema sp.UHO29 ranged from 0.127 to 0.457 d-1. Nannochloropsis sp.UHO3 and Skeletonema sp.UHO29 have high lipid content ranging from 15-44% AFDW and 14-53% AFDW, respectively. The biomass productivity of Nannochloropsis sp.UHO3 and Skeletonema sp.UHO29 range between 10-122 gm-2.d-1 and 13-107 gm-2.d-1 while the lipid productivity value for Nannochloropsis sp.UHO3 ranges from 4 to 31 gm-2.d-1 and Skeletonema sp.UHO29 range from 5 - 25 gm-2.d-1. The results of the analysis of acid composition showed that palmitic acid (C16: 0), stearic acid (C18: 0), oleic acid (C18: 1) and linoleic acid (C18: 2) were the main components of fatt

Keywords: biodiesel feedstock, marine microalgae, Nannochloropsis sp., Skeletonema sp., raceway ponds

Share Link | Plain Format | Corresponding Author (Indrayani Indrayani)


137 Renewable energy ABS-48

The Anaerobic digestion of Mixing Corn Cob and Cow Dung for Biogas Production
A.Amijoyo Mochtar(a*), Jalaluddin(a), Rustan Tarakka(a), Amiruddin(a)

a)Department of Mechanical Engineering, Universitas Hasanuddin, Jl Poros Malino, Gowa


Abstract

Keywords: cow dung, biogas, corn cob, fermentation, pH

Share Link | Plain Format | Corresponding Author (Andi Amijoyo Mochtar)


138 Renewable energy ABS-69

Performance Evaluation of Agricultural Hand Tractor fuelled with Biodiesel (B100)
elita R Widjaya, Uning Budiharti, Harsono, Ni Putu Dian Nitamiwati

1Indonesian Center for Agricultural Engineering Research and Development (ICAERD), IAARD, Ministry of Agriculture Republic of Indonesia


Abstract

Indonesia, the largest palm oil producer country, has succeeded in utilizing 20% and 30% Biodiesel (B20 and B30) and will continue to use biofuels to reduce dependence on fossil fuels. One of the consumers of biofuel is agricultural machinery whose population continues to grow along with the gradual change of Indonesian agriculture practice from labor-intensive to mechanized. Hand tractors powered with diesel engines of 8-15 HP have been widely used in Indonesia. The evaluation of hand tractor performances fuelled with B100 compared with fossil diesel oil (B0) has been conducted. The method of evaluation follows the Indonesian National Standard Procedure, SNI 0738:2014: 2 Agricultural Hand Tractor, Quality Requirements and Test Methods. Continuous loading tests were performed for up to 300 hours. Performance evaluations were made at 0 hours, 100 hours, 200 hours, and 300 hours of operation. The 300 hours continuous load tests show that in general there was a similar trend of decreasing performance for both tractors fuelled with the B100 and fossil B0. By the time of operation time, the performance resulted in the decrease of the power efficiency, the increase of specific fuel consumption and the decrease of maximum achievable power of the shaft. The performance of B100 at 300 hours of continuous load still meets the minimum performance standards as stated in SNI 0738:2014 (>80% power transmission efficiency and <360 g/kW-hour specific fuel consumption). The performance at the 300th hour shows the power efficiency of 82.5% for B100 and 88.7% for B0- specific fuel consumption of 323.44 g/kW-hour for B100 and 290.88 g/kW-hour for B100 and maximum shaft power of 5.2 kW for B100 and 5.6 kW for B0. B100, technically, has the opportunity to be applied in the small diesel engine. The development of additives or catalysts to biofuels may also enhance the performance of B100 fuel in diesel engines.

Keywords: Biodiesel, performance tests, B100, hand tractor

Share Link | Plain Format | Corresponding Author (Elita Widjaya)


139 Renewable energy ABS-104

Characteristics of Biomass Pellets from Palm Shells, Coconut Shells and Teak Wood
Ayunda Gustiani Putri, Yolanda Frista, Frendy Samuel Pratama, Nuraeni Dwi Dharmawati, *Rengga Arnalis Renjani

Department of Agricultural Engineering, Faculty of Agricultural Technology, Stiper Agricultural University (INSTIPER)
*email: rengga_tepins[at]instiperjogja.ac.id


Abstract

Agricultural waste such as palm shells, coconut shells, and large amounts of sawn waste have not been wisely utilized. This study aims to improve the quality of biomass pellets by performing a variety of mixed materials Palm Shell (PS), Coconut Shell (CS), and Teak Wood Powder (TWP). The composition of materials used in the study is 50%PS, 25%CS, 25%TWP (K1)- 25%PS, 50%CS, 25%TWP (K2)- and 25%PS, 25%CS, 50%TWP (K3). Testing of biomass pellet characteristics using wood pellet standard (SNI 8021-2014). The data analysis used a 5% Analysis of Variance (ANOVA) to see how the ingredient mixture affects the characteristics of biomass pellets. The test result obtained biomass pellets mixed with 25%PS, 50%CS, 25%TWP (K2) are the best biomass pellets with a moisture content of 10.78%, diameter 0.63 cm, length 4.68 cm, density 0.8 g/cm3, ash content 1.1%, vaporized substance 73.52%, carbon bound 25.38% and calorific value 4.5050.79 cal/g. The results found that variations in the mixture of ingredients affect the moisture content, density, ash content, evaporating substances, carbon bound, but has no effect on the diameter, length, and calorific value of biomass pellets. It is expected that the making of biomass pellets that use agricultural waste can increase the economic value of waste and produce the best quality of biomass pellets.

Keywords: Biomass- biopelet- palm shell- teak wood- coconut shell

Share Link | Plain Format | Corresponding Author (Ayunda Gustiani Putri)


140 Renewable energy ABS-121

Effect of valve opening on water power on bowl-shaped waterwheel with material variation of blade
Gerard Antonini Duma, Luther Sule

Universitas Hasanuddin


Abstract

The need for energy that is getting bigger every day encourages people to choose energy sources from renewable energy such as water, wind, sun and others. The use of waterwheels now has been using as an energy conversion machine to produce electricity from water energy. The material of waterwheel blade greatly determines the performance of the waterwheel. This study aims to determine the effect of valve opening on fluid power to rotate the wheel with variations in blade material. The blade materials used are plastic, iron, and melamine. This study uses an experimental method by testing the waterwheel by varying the blade material with variations in valve opening. The results obtained that the largest fluid power for plastic material is 33.04017281 watt at valve opening 1 opening, iron material is 20.65680896 watt at valve opening 1, melamine material is 45.41550508 watts at valve opening 1.

Keywords: water, energy, waterwheel, material, power

Share Link | Plain Format | Corresponding Author (Gerard Antonini Duma)


141 Renewable energy ABS-164

The Effect of Spent Coffee Grounds in Increasing the Calorific Value of Waste Paper Briquettes
Dianta Mustofa Kamal1,a), Iwan Susanto2, Fuad Zainuri2, Tatun H. Nufus3, Galuh Inez Maulidya3, Putu Wijaya Sunu4

1Master^s Program in Applied Manufacturing Technology, State Polytechnic of Jakarta, Jl. Prof. Dr. G. A. Siwabessy, Kampus UI Depok 16425, Indonesia
2Heavy Equipment Study Program, State Polytechnic of Jakarta, Jl. Prof. Dr. G. A. Siwabessy, Kampus UI Depok 16425, Indonesia
3Power Plant Study Program, State Polytechnic of Jakarta, Jl. Prof. Dr. G. A. Siwabessy, Kampus UI Depok16425, Indonesia
4Mechanical Engineering Department, State Polytechnic of Bali, Jl. Kampus, Kuta Selatan, Badung Bali 80364, Indonesia
a) Corresponding author: dianta[at]pnj.ac.id


Abstract

Briquettes produced from scrap paper are known for their low calorific value. The calorific value of briquettes from waste paper is in fourth rank after waste wood, charcoal and sawdust. Therefore, the correct ratio of composition mixture to create higher calorific value is required. Spent Coffee Ground (SCG) has been selected as an added material in the composition of biomass mixture since SCG has high calorific value and easily found. The purpose of the study is to find the correct ratio that may increase the calorific value of the biobriquettes made of scrap paper, based on proximate testing and analysis. There are four composition mixture samples used in the study. The first composition mixture is 90% of scrap paper and 10% adhesive- the second one is 70% of scrap paper, 20% of SCG and 10% of adhesive- the third composition mixture is 50% of scrap paper, 40% of SCG, 10% of adhesive- and the fourth composition mixture includes 30% of scrap paper, 60% of SCG and 10% of adhesive. The study shows that the greater ratio of SCG used in the composition will result in the higher calorific value. The research concludes that briquettes achieve their best performances in the composition mixture of 40% of SCG. In the proposed ratio, briquettes are not brittle, and produce 5.366 kcal/kg of calorific value- 6.58% of water content- 5.37% of ash content- 28.28% of volatile matter- and 8.91% of shatter index. Therefore, the studied composition can be considered to produce the most efficient biomass briquettes made from scrap paper.

Keywords: Biomass, Briquette characterization, Proximate Analysis

Share Link | Plain Format | Corresponding Author (DIANTA MUSTOFA K.)


142 Renewable energy ABS-172

Microwave-Assisted Pyrolysis of Waste of Sago
Diyah Yumeina, Novriany Amalia, Makkarennu

1) Agricultural Technology Department, Faculty of Agriculture
2) Mechanical Engineering Department, Faculty of Engineering, Hasanuddin University
3) Faculty of Forestry, Hasanuddin University


Abstract

This research examines the characteristics of microwave assisted pyrolysis products of waste of sago (WoS). The pyrolysis process of conducted with microwave heating of 400 W for 60 minutes. Pyrolysis product such as bio-char were identified using Fourier Transform InfraRed (FTIR) Method. The GC-MS of the bio-char shows about 53% phenol, 19% palmitic and oleic acid, 11% cyclobutene, 14% ethyl and methyl ester, and cyclopentene and cyclohexane in small amounts in accordance with FT-IR results.

Keywords: Bio-char, waste of sago, FTIR

Share Link | Plain Format | Corresponding Author (Diyah Yumeina Razak Datu)


143 Soil and Water Engineering ABS-21

EXPERIMENTAL MODEL TO INCREASE WATER HOLDING CAPACITY IN DRY LAND IRRIGATION
I Wayan Yasa, Ismail Hoesain M, I Dewa Gede Jaya Negara, Ida Bagus Giri Putra

University of Mataram


Abstract

As one of the provinces in Eastern Indonesia, West Nusa Tenggara Province has a very wide dry land potential of almost 161874 ha spread over the southern, eastern and northern parts of Lombok Island, while on Sumbawa Island it is spread in all districts. In general, the very basic problems in the management of dry land irrigation are limited rain and soil texture. The texture of dry land irrigated soil on the island of Lombok is generally sandy, so the productivity is very high. The ability of the soil to hold water is very low and the time to bind soil moisture is very short. Likewise, the intensity of rain in dry land irrigation on Lombok Island is very short, causing the success rate of dry land irrigation agricultural production is very low.
In an effort to increase the ability of porous soils to increase their resistance to irrigation water and rainwater, efforts were made to improve soil texture by replacing the sandy porous soil layer by replacing or mixing the porous soil in the root zone with fine-grained soil. The research design was carried out in a laboratory with experimental modeling. Modeling is done by mixing porous soil with fine grained soil in several portions of the mixture. Furthermore, rainfall modeling was carried out with several variations of rain intensity and measurements of soil moisture and runoff were carried out both through the surface and below the surface. The composition of the soil mixture used is 25% and 50%. The tool used is a rain simulator model. Rain is simulated with a rain duration of 20 minutes, 40 minutes and 60 minutes.
Based on the modeling results show that by mixing porous soil with fine-grained soil can increase soil moisture and water binding time in the root zone is longer. For the percentage of fine textured soil 25% with a rain duration of 20 minutes the humidity can be increased to 48.25%, for a duration of 40 minutes the humidity increases to 52.50% and at a rain duration of 60 minutes the humidity increases to

Keywords: porous, moisture, texture, duration

Share Link | Plain Format | Corresponding Author (I Wayan Yasa)


144 Soil and Water Engineering ABS-81

Pre-Treatment of Raw Water Using Fixed Bed Reactor Technology
Mega Ayu Yusuf (a*), Suprihatin (b), Muhammad Romli (b)

a) Agricultural Engineering, Musamus University, Kamizaun Street, Merauke, Papua, 99600
*mega_ayu[at]unmus.ac.id
b) Agro-Industrial Engineering, IPB University, Darmaga, Bogor, 16680


Abstract

Quality of raw water (river water) is decreasing, as result of industrial and domestic wastes discharge into river without any treatment. Therefore, pre-treatment is needed to improve the raw water quality. An alternative for pre-treatment of the raw water is fixed bed reactor (FBR) system, in which organic substances can be removed biologically.In this experiment, an FBR was used to reduce concentrations of organic, ammonia, total suspended solid (TSS), color and turbidity in raw water. Three type of media were used namely honeycomb tube type made of plastic,recycled plastic bottled of drinking water and pumice. The system is equipped with circulator and aerator to support the microorganism growth on the media surface as biofilms.The experiments were conducted at HRT (Hydraulic Retention Time) between 1-4 hours. HRT of 3 hours was found to be optimum for the reactor with recycled plastic bottled of drinking water with removal efficiency of organic, ammonia, total suspended solid (TSS), color and turbidity are 70%, 61%, 66%, 67% and 63% respectively.

Keywords: Raw water pre-treatment, fixed bed reactor, removal efficiency, Plastic Bottled

Share Link | Plain Format | Corresponding Author (Mega Ayu Yusuf)


145 Soil and Water Engineering ABS-87

The Estimation of Surface Run-off in Sub Watershed Kampili using the HEC-HMS Model
Ayu, Mahmud Achmad, dan Iqbal

Universitas Hasanuddin


Abstract

The Kampili sub watershed is one of the areas quite prone because it is directly adjacent to the Jeneberang watershed, making it easier for river water to overflow. Changes in land use following population growth are one of the causes. In addition, it is also influenced by regional development patterns, which causes the flow of river flows to increase. The HEC-HMS (Hydrologic Engineering Center-Hydrologic Modeling System) model is a program that can provide hydrological simulations of the daily peak flow for the calculation of the planned flood discharge from a watershed. The purpose of this study is to determine the validity level of the HEC-HMS model in predicting flooding and to determine the amount of planned flood discharge that would occur during the 2, 5, 20 and 50 years return periods in the Kampili sub watershed. In the HEC-HMS modeling there are several are rainfall data, discharge data, land use data, and soil types in the Kampili sub watershed. There are three results obtained, namely calibration, validation and rain plan. In the calibration stage, the difference between the observed value and the model simulation value is obtained. At the validation stage, the Nash-Sutcliffe Efficiency (NSE) value method is used. The NSE value obtained is 0,589. Based on these data, the HEC-HMS is quite valid in predicting flood events in the Kampili sub-watershed. The planned rain for each return period of 2, 5, 20 and 50 years, the peak discharge is obtained respectively, namely 217,1 m3/s, 246,7 m3/s, 275,1 m3/s and 289,8 m3/s.

Keywords: Flow rate, HEC-HMS, Nash-Sutcliffe Efficiency (NSE).

Share Link | Plain Format | Corresponding Author (Ayu Ayu)


146 Soil and Water Engineering ABS-95

Analysis of Groundwater Potential and Well Discharge to Determine of Optimal Irrigation Area, Case Study: Data Watershed, Wajo Regency, South Sulawesi Province, Indonesia
Suhardi (a*), Ahmad Munir (a), Muhammad Tahir Sapsal (a)

a) Department of Agricultural Engineering, Faculty of Agriculture, Universitas Hasanuddin. Jl. P. Kemerdekaan, km 10, Tamalanrea, Makassar 90245, Indonesia
*suhardi[at]unhas.ac.id


Abstract

The use of groundwater for irrigation requires large costs because the water discharge that can be taken is limited by the groundwater potential and pump capacity. For this reason, important information before pumping groundwater for irrigation is to know the groundwater potential based on saturated hydraulic conductivity and aquifer description and perform pumping tests. Based on these data, the groundwater potential can be predicted and the data can be used as a basis for conducting well discharge analysis as a basis for determining the area that can be irrigated by one extraction well. The research was conducted to determine hydraulic conductivity through pumping tests, interpret lithological maps to determine aquifer descriptions, determine groundwater potential using Darcy^s approach and analyze optimal well discharge by pumping continuously. The results showed that the groundwater potential in the study area was around 150 l/sec and the discharge for 1 well between 1.50-3.00 l/sec could irrigate an area of 2.82-5.64 ha.

Keywords: Groundwater potential- Well discharge- Lithology map- Continuous pumping- Optimal area

Share Link | Plain Format | Corresponding Author (Suhardi Suhardi)


147 Soil and Water Engineering ABS-97

Evaluation of the Kampili Weir Operations for Irrigation using Hec-ResSim
Mahmud Achmad (a*), Samsuar (a), Ahmad Munir (a), and Wahyuni (a)

(a) Department of Agricultural Technology, Universitas Hasanuddin
* m.achmad1970[at]gmail.com


Abstract

Dam authority has managed Kampili weir to irrigate around 4000 ha rice field since 2004. Farmers were frequently complaint the lacking of water during dry season, so it is necessary to evaluate water allocation for irrigation area. One of hydrological reservoir simulation models that can be used for reservoir operations is the HEC-ResSim model. This study aims to review annual water management of the Kampili weir for irrigation using HEC-ResSim software. The evaluation was done by determining and comparing the water availability in dams and irrigation water needs. Simulation was carried out to compute the availability of water during using the operating allocation pattern and water needs of paddy filed in 2018. It was found that rice field need irrigation in the period of April till October. HEC-ResSim was able to simulate water availability with the highest value in the first 15 days was 25.10 mm/day and the highest water demand is in the last 15 days of September with 15.82 mm/day. During minimum capacity of the weir, it can only supply the irrigation water needs was about 72%. This proves that the weir could not provide total water needs for farmers in Kampili irrigation scheme throughout the year.

Keywords: HEC-ResSim, Irrigation, Kampili weir, reservoir operations

Share Link | Plain Format | Corresponding Author (Mahmud Achmad)


148 Soil and Water Engineering ABS-98

River Flood Control Planning for Rice Fields in the Lower Lumu Watershed Mamuju Tengah Regency
Mahmud Achmad (a*), Samsuar (a), and Jayadi (b)

(a) Department of Agricultural Technology, Universitas Hasanuddin,
(*) m.achmad1970[at]gmail.com
(b)Department of Soil Science, Universitas Hasanuddin


Abstract

New rice fields in the lower Lumu catchment area were experience flooding during heavy rainfall events that affected lack of productivity of paddy field. Mamuju Tengah has potential rice field that needs simple construction to protect them from river floods and enable cultivation in the area. The purposes of this study are to evaluate land and hydrological condition of the catchment and to create embankment for river flood protection of rice fields along the Lumu river. Land suitability and hydrological analysis were conducted to evaluate the condition of the site. The design of river embankment was based on hydrological analysis, and create financial planning for the river flood control in Mamuju Tengah Regency. In terms of soil pH, even some area in Pasapa and Bojo reacted slightly acidly, but most were classified as not saline. The depth of peat in the land is between 0.10 - 1.50 m with most area is shallow and still suitable for rice cultivation. Preventing flood and drainage channel are best solution for the land. River embankment was chosen as solution and the design was done using SNI 03-1724-1989 for Hydrological and Hydraulic Planning Procedures for Buildings on River and SNI 03-2415-1991 for Method of Calculation of Flood Discharge, while financial planning was calculated using SBU 2020. Rainfall with return period of 50-year flows water in Lumu river about 11,670.9 cumecs while river capacity is only 901,272 cumecs. Flood has protected by creating river bank along the river levee 4,079 m long in Pasapa village and 3,415 m long in Bojo village. The construction needs financial support approximately 2.35 billion rupiah.

Keywords: flood control, river embankment, paddy land, peat soil

Share Link | Plain Format | Corresponding Author (Mahmud Achmad)


149 Soil and Water Engineering ABS-100

Soil Water Characteristics in Newly Opened Rice Field
Sartika Laban, Burhanuddin Rasyid, Muh. Jayadi, Ifayanti Ridwan Saleh

Faculty of Agriculture, Hasanuddin University


Abstract

Soil water characteristics is the main information in the irrigation planning and management especially in the new rice field opening program. Monitoring soil water characteristics is needed in scheduling irrigation and determining the amount of water for irrigation. The aim of this reseacrh is to analyze the influence of water management on soil water dynamics in newly opened rice field. This study used an experimental method with two treatment were SRI and conventional. The results of soil analysis showed that the soil in the study area had a clay texture, the wilting point and field capacity in 10 cm soil depth are 34,5% and 44,7%, respectively. In addition, the C-organic content value of 2.68 - 2.91% and low soil fertility status. The average of soil water avaiability in SRI field at 10 cm was lower than soil water availability in conventional field, where 2,30 mm and 4,86 mm, respectively.

Keywords: clay, paddy field,soil water content, SRI

Share Link | Plain Format | Corresponding Author (Sartika Laban)


150 Soil and Water Engineering ABS-101

Land Use Change Effect on Erosion Prediction Results using SWAT Model in Lisu Watershed, South Sulawesi
Try Ardiansah1,a), Mahmud Achmad2, Roland A. Barkey3

1Regional Planning and Development Study Program, Hasanuddin University Graduate School
2Faculty of Agriculture, Hasanuddin University
3Faculty of Forestry, Hasanuddin University

a) tryardiansah[at]gmail.com


Abstract

Lisu watershed in South Sulawesi Province is included in the second priority watershed with the carrying capacity recovery. To minimize the adverse effect of soil erosion on human society and infrastructure, concerted efforts are required for planning and implementation of soil and water conservation practices at a sub-watershed scale. Using the SWAT model, the effect of land use changes on erosion rates in the Lisu watershed will be studied. The land management scenario used in this study is a regional spatial plan scenario (RTRW) to simulate hydrological condition of Lisu watershed by the regional planning of Barru Regency government. The study indicates that SWAT model had a good performance to simulate flow discharge with R2 and NSE values in calibration process of 0.72 and 0.5 respectively. The results of the study showed that spatial plan scenarios were able to reduce soil loss severity classes very high 97.66 % from the actual scenario.

Keywords: Land Use Change, Erosion, SWAT Model

Share Link | Plain Format | Corresponding Author (Try Ardiansah)


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