Ecological Sensitivity Analysis And Ecosystem Service Evaluation Of Ganfu Plain Irrigation Area

The Ganfu Plain Irrigation Area in Jiangxi Province is located in the triangle area of the Fu River and the lower reaches of the Ganjiang River.It is an important water diversion irrigation project in Jiangxi Province and a typical “human-society-nature” complex ecosystem.However,with the rapid economic and social development,population growth,and urbanization level in irrigation areas in recent years,water pollution problems have become increasingly prominent in some areas,soil erosion has become increasingly severe,and the ecological environment has been deteriorating.Ecological environmental issues have gradually become the main factor restricting the healthy development of irrigation areas in the Ganfu Plain.Therefore,conducting ecological sensitivity analysis and ecosystem service assessment on the Ganfu Plain Irrigation Area can provide guidance for the formulation of regional ecological environment protection policies and the rational implementation of regional ecological construction.Therefore,this article takes the Ganfu Plain Irrigation Area as the research area and conducts relevant research work.The main work and conclusions are as follows:(1)The Analytic Hierarchy Process(AHP)and Projection Pursuit Dynamic Clustering(PPDC)combination weight method used in this article was determined by comprehensively comparing the advantages and disadvantages of the two research methods.(2)Nine sensitive factors were selected,and each sensitive factor was divided into ecological sensitivity grades,and a single factor ecological sensitivity grade distribution map was obtained,which laid the foundation for the subsequent comprehensive evaluation and analysis of ecological sensitivity in irrigation areas.(3)Three methods(Analytic Hierarchy Process,Projection Pursuit Dynamic Clustering,and AHP-PPDC Combination Weighting)were used for ecological sensitivity analysis.The results indicate that the ecological sensitivity of the northwest region of the Ganfu Plain irrigation area is relatively high,while the ecological sensitivity of the southwest and northeast regions of the irrigation area is relatively low.The results calculated by different methods are also different.The results calculated by the analytic hierarchy process are more concentrated,while the results calculated by the projection pursuit dynamic clustering method are more statistical dispersion.The application of the combination weight method is both discrete and combined with the opinions of experts,so the ecological sensitivity evaluation results of irrigation areas based on the AHP-PPDC combination weight method can better reflect the actual situation.(4)Select water source conservation and carbon storage as the dominant ecosystem service functions in the irrigation area,conduct an evaluation of the ecosystem services in the irrigation area,and guide the irrigation area to reasonably divide ecological functional areas based on the overall evaluation results of the ecosystem services in the irrigation area.