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
