Analysis Of Functional Degradation Factors Of Riverside Wetland Of Han River

Wetlands,forests and oceans are collectively known as the world's three major ecosystems.Wetlands are known as the "kidney of the earth".It has flood control and water storage,climate regulation,degradation of pollution and other functions,it not only provides people with production,living resources,but also an important environment for people to survive..However,with the increasing population pressure,the rapid development of the global economy,and the continuous acceleration of urbanization,human's demand for soil resource radically expanded.The environmental concerns caused by predatory development and utilization of wetland resources as well as water pollution not only led to the loss of wetland biodiversity and the deterioration of wetland environment,but also greatly reduced the stability of the ecosystem,resulting in wetland become one of the most seriously degraded ecosystems.So,people are paying more attention to the protection and exploitation and utilization of the wetland.Riverside wetland of Han River is located in the upper reaches of the Han River(section in Shaanxi province),and is the core water source in the middle route of the South-to-North Water Diversion Project in China and the source of water diversion from “Han” to “Wei” works cited in Shaanxi province.In recent years,due to the lack of protection of the han river and riverside wetland management,result in the han river riverside wetland degradation is serious,the wetland area is reducing year by year,the ecological environment destruction.In consequence,it is very urgent to investigate and restore the degeneration of the riverside wetland of Han River.This study mainly analyzed the degradation factors of the riverside wetland of Han River from three aspects: literature research on wetland degradation factors,case analysis of typical wetland restoration and wetland resource evaluation.The results are as follows:1)Based on a literature survey of 51 degraded wetlands across the country,7general characteristics of wetland degradation and 12 main factors affecting wetland degradation were identified,and these degradation factors were classified into four categories: A,B,C,and D by statistical research methods.In result,an evaluation system of the degradation of wetland functions was constructed.2)On account of the comparative analysis of four typical cases of riverside wetland restoration in China,the general restoration measures of riverside wetland were summarized in this paper by referring to the relevant restoration experience.3)Through the establishment of index system of the han river riverside wetland resources,to comprehensive evaluation of the han river riverside wetland wetland resources.Firstly,the wetland evaluation index system is divided into three layers,including the target layer,the criterion layer and the indicator layer.Then the criterion layer is divided into 5 parts and the indicator layer is divided into 17 indicators.Fuzzy analytic hierarchy process(FAHP)was used to determine the weight of each level and each index.Combining with expert points the way,through the corresponding matrix to calculate and determine the corresponding evaluation index,through the analysis of the evaluation results accordingly,and concluded the status quo of the han river riverside wetland resources.4)Combined with the previous research,comprehensive analysis of the factors of riverside wetland of Han River degradation and the corresponding restoration strategies were expounded.