FLOOD VULNERABILITY BASED ON SOCIAL ECONOMY CONDITION AT FLOOD PRONE AREA IN PURWOREJO REGENCY, CENTRAL JAVA, INDONESIA

Nugroho Fajar Ariyanto, Ir. Suryanto, MSP

2013 | Tesis | S2 Magist.Prnc.Kota & Daerah

Based on geomorphology aspect, some areas in Purworejo Regency are categorized as flood prone areas. One of them is Butuh District which is categorized as high flood prone area. Flood occurs almost every year in this area and results losses to the community. There are four type of vulnerability on community level; two of them are social and economic vulnerability. Social and economic vulnerability is dynamically change influences the community vulnerability. The main objective of this research is to obtain information of social vulnerability. Survey method was used to obtain community information. Designed questionnaire was used to obtain the information from each respondent in community. The sample area was Kedung Agung Village. Respondents were 60 households from 2 sub village (dusun) which have experience on flood in this area. In this research, two analyses methods were used. First, the pairwise comparison method from the analytical hierarchy process (AHP)-approach to obtained weight of social indicators in social vulnerability calculation. The second analysis method was SWOT analysis, and it was used to determine mitigation strategies based on condition in study area. There are eight social indicators analyzed as element at risk of flood disaster. Most of them show that social economy condition of people in study area is in the low level. Based on social vulnerability analysis, flood social vulnerability level from people in study area are: 55 % in high vulnerability, 35 % in moderate vulnerability, and 10 % in low vulnerability. It means if flood occurs more frequently or are more severe, more people will be affected severely. Local people have their own responses to flood disaster. They also have social institution and networking that can be valuable for disaster risk reduction. Flood coping strategy has been applied by community in this village to reduce damage and loss. People make strategies by preparing physical and social way to alleviate the impact based on local knowledge. There are some mitigation strategies (analyzed using SWOT analysis) based on condition in study area can be proposed for reducing impact of flood disaster. The mitigation strategies are expected to be input for government’s program in the future.

Based on geomorphology aspect, some areas in Purworejo Regency are categorized as flood prone areas. One of them is Butuh District which is categorized as high flood prone area. Flood occurs almost every year in this area and results losses to the community. There are four type of vulnerability on community level; two of them are social and economic vulnerability. Social and economic vulnerability is dynamically change influences the community vulnerability. The main objective of this research is to obtain information of social vulnerability. Survey method was used to obtain community information. Designed questionnaire was used to obtain the information from each respondent in community. The sample area was Kedung Agung Village. Respondents were 60 households from 2 sub village (dusun) which have experience on flood in this area. In this research, two analyses methods were used. First, the pairwise comparison method from the analytical hierarchy process (AHP)-approach to obtained weight of social indicators in social vulnerability calculation. The second analysis method was SWOT analysis, and it was used to determine mitigation strategies based on condition in study area. There are eight social indicators analyzed as element at risk of flood disaster. Most of them show that social economy condition of people in study area is in the low level. Based on social vulnerability analysis, flood social vulnerability level from people in study area are: 55 % in high vulnerability, 35 % in moderate vulnerability, and 10 % in low vulnerability. It means if flood occurs more frequently or are more severe, more people will be affected severely. Local people have their own responses to flood disaster. They also have social institution and networking that can be valuable for disaster risk reduction. Flood coping strategy has been applied by community in this village to reduce damage and loss. People make strategies by preparing physical and social way to alleviate the impact based on local knowledge. There are some mitigation strategies (analyzed using SWOT analysis) based on condition in study area can be proposed for reducing impact of flood disaster. The mitigation strategies are expected to be input for government’s program in the future.

Kata Kunci : Flood, social vulnerability, questionnaire survey, AHP analysis, SWOT analysis