KAJIAN PENGARUH PERUBAHAN TATAGUNA LAHAN TERHADAP FLUKTUASI DEBIT DAS JANGKOK PROVINSI NUSA TENGGARA BARAT

TL;DRAbstract

A change in land use will affect characteristics of the watershed (DAS), and also its hydrological system. The change in the hydrological system also impacts on the availability of water in the watershed. These changes include surface runoff, interflow, and groundwater flow. The analysis of fluctuation in the watershed was conducted based on the effect of changing land use in different years, in rainy conditions of 2000 and 2006, by using SK. Ministry of Forestry of 2001 and software modeling of HEC- HMS (Hydrologic Modeling System). The model was used to estimate the flow of a rain catchment system, especially on low flow. The research was carried out through calibration process based on rainfall data, discharge, and evapotranspiration of same year and also reviewing some representative parameters for the watershed. The further process is simulations based on these parameters with the same rainy conditions scenario toward the different land uses. This process is tailored to research a

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