Abstract:
To facilitate flood control facilities construction in the Sanjiang Plain Region and mitigate agricultural losses caused by flooding disasters,we established a comprehensive disaster risk assessment model.This model aimed to delineate specific disaster risk levels and recommend region-tailored disaster prevention measures.To construct the agricultural flood disaster risk assessment index system,we incorporated data spanning from2010 to 2020,covering hydrological,geographical,meteorological,and socio-economic aspects of the Sanjiang Plain Region.The risk assessment values were determined using the Analytic Hierarchy Process(AHP) and Weighted Geometric Mean Method.Additionally,ArcGIS was employed to partition the flood risk levels at the county level and conduct risk assessment zoning.Our findings indicated that the hazard risk was relatively low in the western part of the Sanjiang Plain.Vulnerability of disaster-receiving bodies decreased from the northeast to the southwest.Furthermore,disaster-prone environments demonstrated higher susceptibility in the southwest direction compared to the northeast.Overall,the region exhibited weak disaster prevention and mitigation capabilities.The comprehensive risk level of agricultural flood disasters was relatively low in the central part of the Sanjiang Plain,while it was higher in the eastern and western regions.Based on a thorough analysis of causative factors,disaster-receiving bodies,and disaster-prone environments,we proposed flood disaster response measures.By establishing the agricultural flood disaster risk index system and employing spatial analysis models to outline the risk levels,the results of flood risk zoning serve as valuable theoretical references for local government decision-making regarding flood control measures in the Sanjiang Plain Region.