A Simulation Method of Terrain Humidity Index Based on Vector Network

A technology of terrain humidity index and vector network, which is applied in the field of simulation of terrain humidity index based on vector network, can solve the problem that the simulation algorithm of terrain humidity index cannot meet the accuracy requirements, etc.
CN107944194BActive Publication Date: 2020-07-10WUHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV
Publication Date
2020-07-10

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Abstract

The invention discloses a method for simulating a terrain humidity index based on a vector network. First a DEM is used to generate a vector network of regular triangular planes, and then a triangulation network TFN algorithm is used to obtain the water accumulation amount from the vector network; a novel algorithm is used to obtain the slope direction and slope from the vector network, and finally the unit catchment area SCA obtained by calculating the water accumulation amount and the slope direction is combined with the slope to simulate the terrain humidity index. Not only is the novel slope direction and slope calculation method provided, but also the method is combined with a TFN algorithm to obtain the novel terrain moisture index simulation method, which improves the simulation accuracy of the terrain humidity index, ensures the reasonable distribution of soil moisture, and meets the accuracy requirements in practical applications.
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Description

technical field

[0001] The invention belongs to the technical field of digital terrain analysis, in particular to a method for simulating terrain humidity index based on a vector network. Background technique

[0002] Beven and Kirkby (Reference 1) proposed topographic moisture index, which is a commonly used topographic index to describe the spatial distribution characteristics of soil moisture and surface saturation by quantifying catchment accumulation and local topographic slope. Since the topographic moisture index was proposed, it has been widely used in hydrology (Documents 2, 3), agriculture (Documents 4, 5), ecology (Documents 6, 7) and other fields (Documents 8, 9). The simulation accuracy of topographic humidity index is very important in practical applications, and many researchers are still working on improving the simulation accuracy of topographic humidity index.

[0003] The simulation of topographic moisture index mainly includes the simulation of unit catc...

Claims

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