Aboveground vegetation ecological water estimation method based on airborne LiDAR (Light Detection And Ranging) and Sentinel-2A data

An ecological water and vegetation technology, applied in the research field of vegetation ecological water, can solve the problems of large workload, inability to study vegetation ecological water, low sample collection efficiency, etc., and achieve the effect of improving accuracy
CN110378926AActive Publication Date: 2019-10-25CHENGDU UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHENGDU UNIVERSITY OF TECHNOLOGY
Publication Date
2019-10-25

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Abstract

The invention relates to an aboveground vegetation ecological water estimation method based on airborne LiDAR and Sentinel-2A data, solves the hydrological effect problem of vegetation from a macroscopic level, undoubtedly is beneficial exploration and attempt, and comprises the following steps: step S10, selecting a research area, and collecting field sample plot survey data; s20, 18 characteristic indexes are extracted from Sentinel-2A remote sensing data, and a vegetation canopy ecological water model is constructed; s30, according to the field survey data, a nonlinear model is adopted to construct a coniferous tree and broad-leaved tree breast height-tree height conversion model; step S40, acquiring single-tree vertical structure information through airborne LiDAR data; s50, constructing an airborne LiDAR vegetation stem and branch ecological water inversion model; and step S60, combining the Sentinel-2A vegetation canopy ecological water with airborne LiDAR vegetation stem and branch ecological water to obtain an above-ground vegetation ecological water reserve result. Compared with a single passive remote sensing source, the above-ground vegetation ecological water reserve result has the advantage that the accuracy of the above-ground vegetation canopy, stem and branch ecological water estimation technology is greatly improved.
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Description

technical field

[0001] The invention relates to the technical field of research on vegetation ecological water, in particular to a method for estimating aboveground vegetation ecological water based on airborne LiDAR and Sentinel-2A data. Background technique

[0002] The invention relates to the technical field of research on vegetation ecological water, and belongs to a method for estimating aboveground vegetation ecological water based on airborne LiDAR and Sentinel-2A data.

[0003] Ecological water (layer) refers to the water body closely related to the vegetation body, specifically, the amount of water conserved or intercepted by the vegetation leaf surface, root system, humus layer, surface root soil layer, and vegetation body. Ecological water (layer) can be divided into three parts: the water intercepted in different forms of precipitation by the vegetation layer (leaf surface, root system, humus layer) with vegetation as the main body; The unsaturated water retain...

Claims

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