MANAGEMENT OF FLOOD HAZARD AREAS IN PASAMAN RIVER BASIN OF WEST PASAMAN REGENCY WEST SUMATRA PROVINCE
Keywords:Flood, River basin, Policy, Management, Flood hazard areas
Floods have caused many losses to human life. Indonesia has around 30 percent of its area is flood hazard. If the disaster hazard areas occupied by the low capacity of society, this condition will cause a high risk of disaster. Arranging the river basin management policy is one of the flood mitigation efforts. This study aims to determine the arrangement of river basin management policy in Pasaman. Geographic Information System (GIS) approach is used to determine the flood hazard areas in the Pasaman river basin. Indicators in determining flood hazard areas are slope, rainfall, land type, land use, and landform. In arranging the policy directives of the Pasaman river basin management, this research used Interpretative Structural Modeling (ISM) approach. In setting the directives policy, twenty experts from relevant stakeholders work together. The results show that around 25 percent of river basin areas in Pasaman is a high flood hazard risk areas. The result also set a priority to reduce sedimentation in rivers in the Pasaman river basin management policy.