ANALISIS PENGGUNAAN LAHAN BAGIAN HULU SUNGAI CILIWUNG DALAM MENGURANGI VOLUME BANJIR JAKARTA DENGAN INTEGRASI CITRA SATELIT DEM SRTM

Abstract

Flooding is a natural disasters phenomenon that often occurs in big cities in
Indonesia, one of them is Jakarta. The Consequences of the floods in Jakarta are lowland
morphology, high rainfall, large surface flow (run-off), river gradient or drainage
gradient is very gentle, tidal influence and siltation of rivers around estuary. Jakarta is a
part of the Ciliwung River downstream part, with a low situation of Jakarta makes the
role of the Ciliwung upstream part become very important. It is connected with a
consequence of the flood runoff that can not be optimally absorbed by the soil, due to
changes in land use are not in accordance with their designation as a protected areas.
The aims of this study to determine the condition of the Ciliwung upstream part
such as changes of land use, condition of morphology and its effect on the volume of
flooding in Jakarta. After knowing the changes and morphology that exist in the area
through satellite imagery, it can be planned arrangement of space that affect the
discharge of water flows into upstream part.
This study is geographically located in 106049'40" - 107000'15" East Longitude
and 6038'15" - 6046'05" South Latitute. Administratively, Ciliwung upstream part covers
30 villages in Bogor Regency there are 2 villages (Sukaraja Subdistrict), 7 villages
(Ciawi Subdistrict), 10 villages (Cisarua Subdistrict) , 11 villages (Megamendung
Subdistrict) and 1 village in the East Bogor Subdistrict. Ciliwung upstream part
watershed area are 14 860 ha.
The method of this study by approach analysis of landforms and land cover. The
main data used are Landsat - 7 ETM +, geological map scale of 1 : 100,000 and the
earth map scale of 1 : 25,000. In addition, for an extra analysis of geological conditions,
also used the image processing results that is Digital Elevation Model. The results used
for the basis of land use planning that expected to be one solution to reduction of rainfall
that disembogue into the Bay of Jakarta.
The analysis results of Landsat satellite imagery with multi-temporal from time to
time there are visible changes in lines vegetation area become more bit and pushed by the
development in various sectors. With the land use planning on the Ciliwung upstream
part, the government is expected to objectify, so the discharge of run-off flowing into
Jakarta is reduced.