ANALYSIS OF DISTRIBUTION PATTERNS OF RAIN STATION IN MEDAN CITY Sarra Rahmadani, Denny Meisandy
Universitas Negeri Medan
Abstract
Floods often occur, one of the causes is rainfall. The distribution of rain should be well patterned, taking into account the density and minimizing errors in recording rain data. This study analyzes the distribution of rain stations in Medan City, including Stamar Belawan, Helvetia Station and BBMKG Medan. The aim is to find out the pattern of placement between rain stations and evaluate the conditions and distribution between rain stations. The results of the mapping pattern using Thissen Polygon and ArcGIS 10.82 state that Helvetia station is located at longitude coordinates 98.63 and 3.60 latitude with the largest area of influence, which is 28.30 Km2 or 71% on a total area of 39.85 Km2. Density analysis There is no identification of density values between stations that meet the WMO standard. So it is necessary to rationalize using the Kagan-Rodda method to meet WMO standards.
