Method for evaluating influence of polar ecological retreat on water conservation function based on InVEST model

Abstract

The invention belongs to water conservation function influence evaluation, and particularly relates to a method for evaluating the influence of polar ecological retreat on a water conservation function by integrating an InVEST model and a multivariate statistical method. The method comprises the following steps: 1), performing type information division on a wetland remote sensing image, and detecting and analyzing a quantitative relationship between wetland type changes and water conservation; 2), carrying out hydrological and geomorphic classification on the wetland according to the wetland coating remote sensing data; 3), establishing an InVEST model; 4), calculating the water conservation amount before and after the spatial pattern change of a regional landscape to be evaluated by usingthe InVEST model; and 5), according to the calculation result, obtaining the degree of the shadow of the landscape space pattern change on the water conservation function by utilizing the principal component and a clustering analysis method. According to the method, an InVEST model is adopted, and the yield is evaluated by comparing the water yields before and after each change coating project isimplemented. In addition, the land cover change characteristics of the wetland are determined, and the influence of the water conservation function is evaluated by considering the land cover, the climate change and the landscape pattern. Accurate and scientific evaluation is carried out on the influence on the water conservation function in the polar ecological retreat project, valuable referenceis provided for the polar ecological retreatproject, and the result provides guidance for regional ecological restoration and ecosystem function evaluation of the government.

Description

technical field [0001] The invention belongs to the impact evaluation of water source conservation function, and in particular relates to a method for evaluating the influence of ecological poplar retreat on water source conservation function based on the InVEST model. Background technique [0002] The water conservation function is the main focus of lake wetland ecosystem function evaluation. Its function not only ensures the environmental habitat quality of the wetland, but also is the key condition for maintaining the nutrient and water vapor cycle of the wetland ecosystem. Wetland protection refers to the comprehensive performance of various hydrological processes and their impact on wetland ecosystems. Its intensity is closely related to factors such as land cover grade, vegetation fraction, litter composition, soil thickness, and soil physical properties. In addition, water conservation plays an important role in soil and water conservation, reducing flood peaks, puri...

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However, the existing methods for evaluating water conservation function cannot ev...

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