Prediksi Bahaya Erosi Dengan Metode USLE Menggunakan SIG Pada Wilayah DAS Vatutela Kelurahan Tondo Kecamatan Mantikulore

SUMMARY
MOHAMMAD RIZAL IQWALDI - L 131 15 120, Prediction of Erossion
Hazards by USLE Method using GIS in Watutela Watershed, Tondo Village,
Mantikulore District, Supervised by Dr.Ir.H. Hamzari, M.sc.
Watutela watershed is a watershed in Tondo sub-district of Mantikulore
sub-district with ID DAS 183419 which has an area of 923.01 Ha. In this study
using the USLE method with Geographic Information System Technology, this
study aims to know the erosion hazard that occurs inWatutela watershed and is
expected to be useful as basic information about erosion conditions in Watutela
watershed and consideration in planning management of Watutela watershed,
especially in the area district that spans the river basin.
This research was conducted for 3 months, from February to April 2020,
the method used in this study is the USLE method computed with the application
of ARCGIS
Data analysis was performed utilizing GIS with the projection and
coordinate system used is the Universal Transverse Mercator (UTM), the unit is a
meter to enable analysis that requires information such as distance and area by
map overlay and then calculated using the general equation of the maximum soil
loss formula developed by (Wichmeir and Smith, 1978) i.e. A = RKLS.CP. by
utilizing the Field Calculate, Calculate Geometry and select by attribute (query)
facilities to find out the Erosion Hazard Class. Stages of data analysis include:
Overlay, data attribute editing, tabular analysis and graphic (spatial) presentations.
The results of this study concluded that in the Watutela watershed known
erosion in the erosion hazard class IV criteria with a heavy classification is in the
shrub land unit in the unit land I ie shrub classified as erosion hazard class IV
(weight) erosion in the land unit of 231.02 tons ha- 1 th-1 with a land area of
115.86 Ha. while the lowest is in land unit VII with a low classification is in the
use of dry land agricultural land amounting to 21.159872 tons ha-1 th-1, dry land
agriculture has the lowest erosion value because apart from the limited area of dry
land agriculture there are conservation measures and treatment of how to plant cut
contour lines so that it affects good erodibity.