Method for monitoring vegetation water source conservation amount change

Abstract

The invention relates to a method for monitoring vegetation water source conservation amount change. The method comprises the steps of acquiring global land total water reserve change data, rainfall,actual evapotranspiration, soil water reserve, snow melting amount, snow water reserve, surface water reserve, underground water reserve, water resource amount change amount, dry branch and fallen leaf layer interception amount, average natural water content, maximum water holdup and litter accumulation amount; preprocessing data, and calculating the vegetation canopy water storage variation; calculating interception variation of a dry branch and fallen leaf layer; calculating soil water storage variation; and determining the water conservation variable quantity according to the vegetation canopy water storage variable quantity, the dry branch and fallen leaf layer interception variable quantity and the soil water storage variable quantity. A traditional method for calculating the soil water storage capacity through the product of the soil layer thickness and the non-capillary porosity is abandoned, the soil water content remote sensing data provided by NASA is used for calculating thesoil water storage variable quantity, and new technical support and reference are provided for ecological restoration process, ecological effect evaluation and water conservation evaluation.

Description

technical field [0001] The invention relates to the fields of ecological environment monitoring and water resources utilization, in particular to a method for monitoring changes in vegetation water conservation. Background technique [0002] The change of vegetation water conservation reflects the ecological benefits in the process of vegetation restoration, and reflects the evolution direction of the ecosystem to a certain extent. However, current estimates of vegetation water conservation are calculated using the sum of vegetation canopy water storage, litter interception, and soil water storage. The model has the following limitations: First, the water storage capacity of the vegetation canopy is mainly represented by the maximum interception capacity of the forest canopy, which is inherently inaccurate. Secondly, the calculation model of maximum interception by vegetation canopy is relatively simple, and only the average maximum water holding depth of leaf area, vegetat...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for monitoring changes in vegetation water conservation, so as to solve the technical defects and model blank problems that existing technologies and models are difficult to monitor the temporal and spatial dynamic changes of water conservation in the process of vegetation restoration

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