Method for quantificationally measuring forest land vegetation ecosystem water demand based on evapotranspiration

Abstract

The invention discloses a method for quantificationally measuring forest land vegetation ecosystem water demand based on evapotranspiration. The method comprises the following steps of (1) forest landvegetation acreage determination; (2) potential evaporation determination; (3) vegetation coefficient determination, wherein the ratio of water demand to the potential evaporation determination is determined according to a vegetation type; (4) soil moisture correction coefficient determination, wherein a soil moisture correction coefficient is determined according to a forest land vegetation sitecondition difference; (5) forest land vegetation ecosystem water demand quota determination; and (6) forest land vegetation ecosystem water demand quantum calculation. The method for quantificationally measuring the forest land vegetation ecosystem water demand based on the evapotranspiration has the advantages that a vegetation coefficient and a soil moisture coefficient are used for the correction of the forest land vegetation ecosystem water demand, the influence of vegetation type, site condition and other factors on the forest land preparation main water consumption item is effectively reduced, the forest land vegetation ecosystem water storage is measured quantificationally, and the method has important significance for region water resource management and ecological environmental protection.

Description

technical field [0001] The invention relates to a method for quantitatively measuring and calculating the ecological water demand of woodland vegetation based on evapotranspiration, and belongs to the field of techniques and methods for quantitatively measuring the water demand of vegetation ecosystems. Background technique [0002] Due to the deteriorating ecological environment due to the shortage of water resources, people pay more and more attention to the ecological environment in arid areas. Different climate conditions and underlying surface conditions lead to differences in precipitation, resulting in changes in the amount of surface water resources in different regional backgrounds. Atmospheric precipitation is firstly utilized by natural vegetation and then forms surface runoff before it can be managed and utilized by humans to meet economic and ecological water demands. Focusing on the problems of ecological water demand, ecological water consumption and ecologic...

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Problems solved by technology

[0005] The present invention mainly aims at the problem that it is difficult to quantitatively measure the ecological water demand of woodland vegetation, analyzes the influence of factors such as vegetation types and site conditions on the main water consumption items of woodland vegetation, and proposes a method of using correction coefficients to calibrate the potential of vegetation under different types and site conditions. The method of evapotranspiration can quantitatively measure the ecological water demand of forest land vegetation, which is of great significance to regional water resource management and ecological environment protection

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