CLASSIFICATION OF DROUGHT LEVEL IN BONE WATERSHED
Based on SK.328 / Menhut-II / 2009, the Limboto Bone Bolango River Basin (DAS) is designated as a watershed in critical condition and requires priority handling. This study aims to determine the level of vulnerability of Bone watershed to drought. This research was conducted at Bone River Basin (DAS). The method used is SWAT Method (Soil and Water Assessment Tool) by using ArcSwat software. This research is included in non-experimental research by using direct observation in the field. The input data in the SWAT Model is the slope, the type of land cover, climate, and soil type. The parameter that is the output of SWAT Model used in determining the level of vulnerability of the watershed, is the value of SW (Soil Water) for the determination of drought. Research has shown that Bone watershed has a susceptibility to dryness, 21.7% of the watershed area is susceptible to susceptible drought classification, while 78.5% are in the non-vulnerable category. This percentage is spread in 15 and 50 sub watershed/Small watershed. The decrease in productivity of one agricultural commodity shows that the Bone watershed which is administratively located in Bone Bolango Regency is related to the existing drought levels.