Analisis Perubahan Penggunaan Lahan Terhadap Karakteristik Hidrologi Di Das Bulok

Abstract

Land use is one of the factors that have an effect on water system function of a watershed. The characteristic of hidrological condition at Bulok Watershed was degraded. This reaserch was carried out by analyzing data of rainfall, stream discharge, observation land use map, fluctuations of stream discharge and coefficient runoff at 2001, 2006, and 2011. The results of analysis were linked tabulated results with land use in descriptively. The results of this research showed by land use change, which were decreasing forests and mixed dryland farming area, increasing residential area and dryland farming area, which were decreasing forests and mixed dryland farming area, increasing residential area and dryland farming area was caused that the fluctuatoin of stream discharge in 2001 was to 12,45 and increased in 2006 was 51,27 and more increased in 2011 was 129,96. The coefficient runoff of Bulok Watershed has increased in 2001 was to 6% and increased in 2006 was 35% and more increased 2011 amounted to 41%. The increased fluctuation of stream discharge and coefficient runoff 2001-2011 showed that Bulok Watershed was degraded. Keywords : hydrologic characteristic, land use, watershed