Utilization Landsat to know Effect of Drought Against Tobacco Planting Pattern Territory Bojonegoro using Motion Flow Weir

Water is a key resource in support of human life, both for the fulfillment of their daily needs as well as a supporter of human activity. Bojonegoro with an area of 230 706 ha is the region with the condition of difference rainfall is quite clear, during the dry season and the rainy season. Genesis El-Nino became one of the factors of drought which can be categorized into a meteorological drought that resulted in inadequate water availability and to overcome the limitations of water resources, the government is building a dam to drain water Gerak Bojonegoro Solo River to the paddy fields.The purpose of this study was to determine the level of the drought that occurred from rainfall for 30 years using SPI (Standardized Precipitation Index) in the year of El Nino (1991, 1997, 2002, 2009 and 2015) were also reviewed drought conditions of the analysis of Landsat imagery and associated with the availability of water weir Gerak Bojonegoro on cropping patterns tobacco. Then obtained the drought conditions in the year of El Nino are more likely to show increased and the average peaked in September according to the supervised analysis of Landsat images. While the cultivation of tobacco in optimizing in 2002 and 2009 with drought conditions, farmers still optimizing through shifting planting along streams and rivers. Whereas in 2015 in the time of drought is very high, the availability of water is reduced to make farmers more likely to pay attention to the time of planting to reduce water availability constraints or prefer emptied while the existing land (fallow