Flood disaster risk system at bengawan solo river in east java region using fuzzy method

In Indonesia, East Java is one of the province in Java Island which is often hit by floods. Flooding in this area caused by Solo River that is pass the north area of East Java. Each year there would be flooding as much as 37 times with the average incidence is 4–5 times. The flooding that hit the area resulted the disruption of public health, economic activities, and urban infrastructure damaging. So that it takes information to face the danger of flooding. In this research is developed a decision support system to determine the risk level of floods by using fuzzy method. The system generates a risk map that is divided into three levels of risk, namely low, medium and high. The object of research is focused on 36 districts that is passed by Solo River in East Java. The results of the evaluation of the risk level of floods by using fuzzy method has a 77% accuracy rating.