Development of Flash Flood Hazard Map in Bima City (NTB) using Analytical Hierarchy Process

Humanosphere Science School 2017; 7th International Symposium for a Sustainable Humanosphere

地球科学;经济学

Romdani, R.P.^1 ; Tamamadin, M.^1 ; Susandi, A.^1 ; Pratama, A.^1 ; Wijaya, A.R.^1

Faculty of Earth Sciences and Technology, Institut Teknologi Bandung, Ganesa 10, Bandung, West Java

4013, Indonesia^1

关键词: Analytic hierarchy process (ahp);    Analytical Hierarchy Process;    Decision making models;    Heavy rainfall;    Local government;    Rainfall factor;    Stream channels;    Weighted linear combinations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/166/1/012035/pdf
DOI  :  10.1088/1755-1315/166/1/012035

来源: IOP

【 摘 要 】

Flash flood is one of the hydro-meteorological hazards that often occurs in Indonesia. Some major factors affecting this hazard are high topography and weak soil structure. Every incident of flash flood has caused losses in the form of damage to infrastructure, victims, and the other losses. Therefore, flash flood hazard areas should be mapped so that community and local government can anticipate the event during heavy rainfall. This study developed a flash flood hazard index using a decision-making model, with approach of the Analytic Hierarchy Process (AHP). With this method, four parameters were calculated, namely the distance to the stream channels, slope, cover and soil types. The weight and rank values were assigned to the layers and classes of each layer respectively. A hazard map was obtained using an algorithm that combines factors in weighted linear combinations. The index of flash flood hazard zone with rainfall factor was analysed with sensitivity analysis shows better result since 13 of 16 flash flood points (81.25%) are in high vulnerability to flooding.