Evaluation And Restoration Strategy Of Ecological Environment Vulnerability In The Upper Reaches Of Taizi River Section

1.Indicator selection and data extractionAccording to the actual situation in the study area,select the appropriate indicators;collect,count,mine and process the indicator data.The data of this research index is that the remote sensing data(vector data or raster data)is the basic unit of the grid unit;the second is the social statistical data,with the administrative division as the basic unit;the third is the monitoring point data,with the point As the basic unit,and comprehensive analysis of these indicators,explore the impact of each indicator on the ecological environment of the study area.2.Assessment of ecological environment vulnerabilityThe range data of the collection and spatial extraction were standardized by the range method;the weighted value of the standardized data was weighted by the analytic hierarchy process(AHP);and the comprehensive index method was used to evaluate the ecological environment vulnerability of the upper reaches of the Taiziheshan section.According to the evaluation results,the ecological environment vulnerability and main stress factors in the upper reaches of the Taiziheshan section are analyzed.3.Ecological environment restoration strategyAccording to the evaluation results of ecological environment vulnerability in the upper reaches of the Taizi river section,the problem of ecological environment vulnerability is obtained,and a feasible ecological environment restoration strategy is proposed for the existing problems.main conclusion:1.According to the ecological environment vulnerability index(EVI)of the upper reaches of the Taizi river section,the ecological environment in the upper reaches of the Taizi river section is relatively good in 2016,and the vulnerable area is only 8.63%,mainly distributed in the north of the alkali plant town and Nandian Town;medium-and medium-fragile areas account for 47.37%,and mild and slightly vulnerable areas account for 44%;2.Among the evaluation indicators,sensitivity,average water level difference,altitude and slope index;pressure,river blocking,farmland area and population density;state,vegetation coverage,aquatic biological status and habitat quality Status indicators;response,environmental protection investment and enclosed forest area indicators;the above indicators have a greater contribution to the ecological environment vulnerability,indicating a greater impact on the ecological environment.3.Overall,the low-altitude and mid-altitude regions are mainly dominated by medium-and moderately vulnerable areas,and the fragile areas in the slightly fragile areas are mainly distributed in high-altitude areas,and the fragility in high-altitude areas is slightly lower than that in the middle and low-altitude areas.The focus of the restoration should focus on the middle and low altitude areas.4.According to the river geography and land use characteristics of the upper reaches of the Taizi river section,and the evaluation results of ecological environment vulnerability,the theoretical and technical methods for the restoration of river aquatic community and the restoration of river water ecological function are carried out,and the upper reaches of the Taizi river section is proposed.Ecological environment restoration strategy.