Pengaruh Perubahan Penggunaan Lahan Hutan di Sub Daerah Aliran Sungai Setail Hulu terhadap Persediaan Air Irigasi Pengairan Genteng Banyuwangi Jawa Timur = The Influence of the Land Use Change Forest in Upper Catchment .

The research area is situated in the upper sub watershed of Setail and the Genteng Irrigation in Banyuwangi Regency, East Java. The main obyectives of this research are : (1) to analyze the influence of forest land use change in the upper Setail sub watershed on discharge flow of Setail river and, (2) to find out the water supply of Genteng irrigation as an impact of the forest change in upper Setail sub catchment area. The methods employed in this research is aerial photographic interpretation combined with field work. Aerial photograph of 1983, 1993 and land use map of 2001 were used to locate the area of land use change, while field work was conducted using the pusposive sampling technique. The primary data consists of discharge flow of irrigation canals and soil samples drawn on the basis of the land use unit. The secondary data which was collected from the government institution were AWLR, climate, discharge flow of Genteng irrigation. Flow condition was analyzed using discharge flow method of moving average, while irrigation requirement was analyzed using agrohidrology method. The influence of land use change in the upper Setail sub watershed ... Keywords: land use change, condition flow discharge, water requirement, supply irrigatio