Estimasi Kerugian Ekonomi Akibat Banjir Sungai Pesanggrahan di Pemukiman Kedoya Selatan Jakarta Barat
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The overflow of Pesanggrahan river is one of the main cause of flood in Kebon Jeruk area, West Jakarta. It causes loss that affects people in the impacted area. There for, the government has conducted river normalization program. This program needs additional land, thus, residents in the area need to be relocated. Most of people are objected to be relocated, and it becomes serious problem for the program. Based on the explanation, the objective of this research are to study residents’ perception towards Pesanggrahan river flood danger risk, to estimate direct and tangible financial loss value in housing sector, and to identify factors that influence residents’willingness to be relocated. Cross section data is obtained through survey that is conducted to 70 respondents in South Kedoya, and multistage random sampling is applied to choose the respondent from all population. Data analytical method consists of Spearman corelation, Stage Damage Function (SDF) application, and logistic regression analysis. The result shows that there is a weak corelation between people’s perception towards the consecuencies happened in the future, with people’s perception in conducting flood mitigations. Beside that, the loss value that have to be bear by each family in the riverside, and in South Kedoya, during January 17th – 19th, 2013 are IDR 3 936 332 and IDR 4 070 167 288 accordingly. If it was assumed that Pesanggrahan river’s normalization program could decrease flood’s depth up to 50%, so total losses value will decrease to 14 %. Aside that, if it was assumed that this normalization program could decrease flood’s duration up to 50%, so total losses value will decrease to 31 %. The number of respondent who agrees to be relocated is 57.1%, and 42.9% refuses. The factors that affect resident willingness to be relocated are house width and the number of family member.