Research on the Risk and Impact of Mountain Flood Disasters in Ninghai County Based on GIS-AHP
The occurrence of mountain flood disaster is mainly affected by rainfall,elevation,slope and other factors,and the severity of disaster is mainly related to factors such as population density,arable land area,and industrial production value.Therefore,based on the analysis of the previous results,this study used the Analytic Hierarchy Process to evaluate the mountain flood risk in various townships in Ninghai County.By adding weights to indicators such as rainfall,terrain,and slope that affect the occurrence of mountain flood disasters,a hazard index map of mountain flood disasters is obtained.The vulnerability index chart is obtained by adding weights to indicators such as population density,arable land area,and unit area industrial production value.Finally,the normalized risk index of mountain flood disasters in Ninghai County is calculated by multiplying the risk level and vulnerability level,and the risk index map is obtained.Compared with the situation of important villages affected by mountain flood disasters,the risk index map of mountain flood disasters calculated based on the Analytic Hierarchy Process has a certain degree of rationality and objectivity.
Analytic Hierarchy Processdangervulnerabilityrisk index
万方数据
维普
