Analisis Run-Off Sebagai Dampak Perubahan Lahan Sekitar Pembangunan Underpass Simpang Patal Palembang dengan Memanfaatkan Teknik GIS
Abstrak: The amount of surface
run off is influenced by land use, soil type, and slope. To analyze the impact of the changes in land
use on the runoff , it is needed to know
the amount of coverage or the area to be analyzed, elevation plans, and soil
conditions. The elevation changes in an area can cause the changes of catchment
area on it. So that, the runoff and the direction that occur also changes. The
purpose of this study is to analyze the change and amount of runoff around Underpass Simpang Patal Palembang by
using GIS method, and to analyze the capacity of drainage plan on Underpass
Simpang patal.
The method that is used in this study using Geographic Information System
(GIS) method, that is DEM analysis to catchment area changes, land use data
overlay, and to analyze the amount of runoff from the area plan rainfall. This
study used the existing elevation data (spotheight data), rainfall data of Palembang in the past 10 years, the height
plan data of Underpass Simpang Patal, and land use data from Peta Garis Kota
Palembang with the scale 1:1000.
The analysis of the results showed that the elevation change in Underpass
Simpang Patal construction site cause the catchment area around that location
is changed. The smallest percentage of land change to the runoff that will
occur is 0.159%, and the biggest percentage of land change to the runoff that
will occur is 90.022%. The analysis of the drainage plan capacity of Underpass
Simpang Patal Palembang show that the drainage plan is able to accept the
runoff predictions that will happen, but it’s not economic. The economic
dimention is 45 cm x 90 cm.
Penulis: Riani Muharomah
Kode Jurnal: jptsipildd140245
