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Evaluation on Ecosystem Function Degradation Threaten in Upstream of Yangtze River Based on GIS

Yang Cun-jian

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Abstract

A 4-level index system structure was built based on the 4 ecological systems,forest,grassland,farmland and wetland in the researched zone.Then InVEST model,AHP method,Data Standardization method,GIS and RS technology were applied to evaluate the ecosystem function degradation threaten of which the grid cell size was 100 m× 100 m.Final evaluation results showed that the degradation status along upper Yangtze River was developing from scattered to centralized distribution.

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What this paper is about

A 4-level index system structure was built based on the 4 ecological systems,forest,grassland,farmland and wetland in the researched zone.Then InVEST model,AHP method,Data Standardization method,GIS and RS technology were applied to evaluate the ecosystem function degradation threaten of which the grid cell size was 100 m× 100 m.Final evaluation results showed that the degradation status along upper Yangtze River was developing from scattered to centralized distribution.

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Available abstract

A 4-level index system structure was built based on the 4 ecological systems,forest,grassland,farmland and wetland in the researched zone.Then InVEST model,AHP method,Data Standardization method,GIS and RS technology were applied to evaluate the ecosystem function degradation threaten of which the grid cell size was 100 m× 100 m.Final evaluation results showed that the degradation status along upper Yangtze River was developing from scattered to centralized distribution.

Key concepts: Analytic hierarchy process, Yangtze river, Upstream (networking), Environmental science, Wetland, Ecosystem, Functional ecology, Grassland degradation

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