Riparian zone vegetation coverage extraction method based on mountain river classification

A technology of vegetation coverage and extraction method, which is applied in the field of extraction of vegetation coverage of riparian zones based on classification of mountainous rivers, can solve the problems of high cost and low precision, and achieve the effects of avoiding manpower and material resources, improving precision, and wide applicability

Active Publication Date: 2020-02-28
HOHAI UNIV
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Problems solved by technology

[0003] Purpose of the invention: In order to overcome the deficiencies of the prior art, the present invention provides a riparian zone vegetation coverage extraction method based on mountainous river classification, which can solve the

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  • Riparian zone vegetation coverage extraction method based on mountain river classification
  • Riparian zone vegetation coverage extraction method based on mountain river classification
  • Riparian zone vegetation coverage extraction method based on mountain river classification

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Embodiment Construction

[0033] The invention discloses a method for extracting riparian zone vegetation coverage based on classification of mountainous rivers. The method classifies mountainous rivers according to the Strahler encoding method, obtains remote sensing images of the watershed for many years, and extracts the riparian zone of each river section by using the method of ENVI supervision and classification. For vegetation information, the length of the river is weighted and averaged to obtain the vegetation coverage of the riparian zone of the entire river, and then the spatial distribution and temporal dynamics of the vegetation coverage are analyzed. Such as figure 1 As shown, specifically, the following steps are included:

[0034] Step 1. Analysis of the hydrological characteristics of the watershed

[0035] Obtain the DEM raster data of the required mountainous rivers, and use ArcGIS to analyze the hydrology of the basin according to the relationship between slope, aspect and topograph...

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Abstract

The invention discloses a riparian zone vegetation coverage extraction method based on mountain river classification, and the method comprises the steps: obtaining the gradient, slope direction, change rate and elevation of each point of a mountain river required by a model, and extracting the features of a water system; grading the rivers in the required mountainous area; cutting the preprocessedremote sensing data image by adopting a boundary corresponding to the drainage basin area to obtain a remote sensing data image of the whole required mountainous area river drainage basin; obtainingthe vegetation coverage of each river reach, and calculating the vegetation coverage of the riparian zone of the required mountainous river; and estimating the vegetation coverage change trend according to the watershed vegetation coverage multi-year change rate. The method can conveniently and quickly obtain the vegetation coverage of the riparian zone of the mountainous river, avoids consuming too much manpower and material resources, improves the precision, can reflect the ecological environment of different river sections of the mountainous river, belongs to an important part of ecologicalriver evaluation, and is very high in practicality and wide in applicability.

Description

technical field [0001] The invention relates to the technical field of remote sensing applications, in particular to a method for extracting vegetation coverage in riparian zones based on classification of rivers in mountainous areas. Background technique [0002] Vegetation is an important part of the geographical environment. Understanding the temporal and spatial variation characteristics of vegetation coverage in mountainous watersheds and analyzing the relationship between mountain river structure and vegetation is not only conducive to forest protection and rationalization in mountainous areas, but also contributes to the restoration of vegetation in the riparian zone and the ecology of the watershed. Environmental improvement provides technical and theoretical support. The existing vegetation coverage measurement methods have the disadvantages of low precision and high cost. With the popularization of DEM data and the development of satellite remote sensing technology...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/32G06K9/46G06K9/62
CPCG06V20/182G06V20/188G06V10/25G06V10/40G06F18/24Y02A10/40
Inventor 董增川王诗韵任黎马克迪金大伟张璐贾晴雯
Owner HOHAI UNIV
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