Watershed similarity discrimination method based on watershed attribute distance

A discrimination method and watershed technology, applied in character and pattern recognition, image data processing, instruments, etc., can solve the problems of lack of watershed attribute optimization system, great subjective arbitrariness, low efficiency, etc., to achieve stable and reliable data sources, guaranteeing The effect of objective rationality
CN111985389AActive Publication Date: 2020-11-24POWERCHINA CHENGDU ENG +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
POWERCHINA CHENGDU ENG
Publication Date
2020-11-24

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Abstract

The invention relates to a hydrological analysis technology in water conservancy and hydropower engineering, and discloses a watershed similarity discrimination method based on watershed attribute distance to improve comprehensiveness, objectivity and rationality of reference watershed selection. The method comprises the following steps: firstly, performing nested watershed division and watershedattribute optimization based on high-resolution multi-source massive satellite remote sensing attribute raster data; secondly, extracting attribute raster data of each nested watershed according to the mask layer of each nested watershed; calculating a basin attribute distance of each nested basin through a generalized distance capable of comprehensively reflecting a basin attribute factor and a basin nested structure; and finally, calculating the basin similarity of each nested basin based on the basin attribute distance, and performing basin similarity judgment according to similarity grading. According to the method, the accuracy and accuracy of basin similarity judgment are effectively improved, important technical support is provided for reasonably selecting the reference basin in hydrological analysis of water conservancy and hydropower engineering in regions lack of data, and the selection of the reference basin is more comprehensive, objective and reasonable.
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Description

technical field

[0001] The invention relates to hydrological analysis technology in water conservancy and hydropower engineering, in particular to a watershed similarity discrimination method based on watershed attribute distance. Background technique

[0002] Basic hydrological data are the basis of hydrological analysis and calculation of water conservancy and hydropower projects, and their importance is self-evident. Today, the overall development of water conservancy and hydropower in the basin is showing a development trend from areas with data to areas without data; and the local area often lacks long series of hydrological data that can meet the requirements of the "Code for Hydrological Calculation of Water Conservancy and Hydropower Engineering (SL 278-2002)" (the length of the series should be within over 30 years). Therefore, the shortage or scarcity of basic hydrological data is a common problem faced by hydrological analysis and calculation of water conservancy...

Claims

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