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STUDY OF SURFACE RUNOFF BY USING GEOGRAPHIC INFORMATION SYSTEM CASE STUDY: DAS (WATERSHEDS) POLEANG – RORAYA

Journal: International Journal of Engineering Sciences & Research Technology (IJESRT) (Vol.7, No. 3)

Publication Date:

Authors : ; ;

Page : 151-161

Keywords : Debit Flow; Rainfall; Rational Method; Geographic Information System; ArcGIS.;

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Abstract

Hydrological analysis still a very dominant part of the analysis and require careful handling and calculation of top debit is a very important element in flood control. Rainfall, catchment area, as well as geographic information such as slope and land cover is a parameter for estimating debit by using rational method. The purpose of this study is Estimating thedebit flow based on the rainfall data in the Poleang-RorayaRiver Region using open-source software-based Geographic Information System (GIS). In this study calculated rainfall plans to return period of 2 years, 5 years, 10 years, and 25 years with the method of Log Pearson Type III distribution. By using the ArcGIS softwaredebit flow obtained was 377.05 m3 / sec on a return period of 2 years; 448.17 m3 / sec on a return period of 5 years; 482.00 m3 / sec on a return period of 10 years; and 512.49 m3 / sec on a return period of 25 years.

Last modified: 2018-03-08 20:26:19