Analisa Runoff Pada Sub DAS Lematang Hulu
Sari: Runoff is one of the
factors that can cause landslides. This phenomenon occurs in Lematang watershed especially in upstream
region. The purpose of this research is to determine runoff that occur in
LematangHulu sub-watershed. In the analysis of runoff, LematangHulu watershed was divided into 5
sub-watershed, namely Sub DAS L Hulu 1 – Sub DAS L Hulu 5.
The method used in analyzing this runoff is Rational one. It considers
runoff coefficient, the intensity of
rainfall and catchment area. All
parameters runoff’s calculation obtained by using spatial interpretation of
satellite images for land use (C),boundary / area in the drainage (A) from
analysis of DEM ( Digital Elevation Model ), and the distribution of rainfall
intensity (I) using Algebra Average & Mononobe formula.
The result show that in Sub DAS L Hulu 3, one of the sub-watershed should
receives extra attention because it yields high runoff which is equal to 679,8
m3/s. It may cause flood or landslide in the future.
Penulis: Gina Putri Verrina,
Dinar Dwi Anugerah, Helmi Haki
Kode Jurnal: jptsipildd130062
