MAP ANALYSIS OF LAND USE IN KHILAU SUB-SUB WATERSHED, WAY BULOK SUB-WATERSHED, WAY SEKAMPUNG WATERSHED, LAMPUNG PROVINCE
DOI:
https://doi.org/10.11113/mjce.v35.19779Keywords:
ArcView GIS MAP, Surface flow coefficient, Khilau Sub-Sub Watershed, Land Use, WatershedAbstract
An increase in population impacts conditions of forest, soil, and water resources in watersheds through land use change. One of the hydrological components in the watershed influenced by this change is the surface flow coefficient (C). This study aimed to analyze the land characteristics of the Khilau Sub-Sub Watershed, Bulok Sub-Watershed, Sekampung Watershed, Lampung Province. The research methods involved taking aerial photos and field observation with an application called ArcView GIS MAP as the research tool. The analysis results signify that the land use in the watershed was divided into 6 main types with a total area of 671.6776 Ha. The surface flow coefficient value (Ctotal) was 0.1412, which indicates that all rainwater falling into the watershed was well infiltrated into the soil so that the land use was categorized as good. It was found out that, with the use of the GIS application, the land use in the Khilau Sub-Sub Watershed comprises 6 main types, i.e. mixed gardens, forests, annuals, shrubs, settlements, and rice fields. The mixed garden type of land use has the highest coefficient (C) value of surface flow runoff, so it Therefore, the rainwater in the watershed area is well infiltrated into the soil so that it is safe to categorize the land use as good.
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