A method and system for identification of dehydration in river course

Abstract

The invention discloses a method and system for identifying dehydration of a river course. The method includes: obtaining remote sensing image data covering the river in different periods; different periods include dry season and wet season; calculating MNDWI composite index based on remote sensing image data in different periods; extracting water body information in different periods based on MNDWI composite index The water body information determines the water body area in different periods; obtains the relationship curve between river flow and water body area; determines the river flow in different periods based on the relationship curve and the water body area in different periods; identifies the dehydration of the river based on the river flow in different periods. The present invention collects and preprocesses the remote sensing image data covering the river, generates MNDWI in the dry season and the wet season, effectively and efficiently extracts the river water information in the dry season and the wet season, analyzes the dehydration of the target river, and realizes that the ecological flow of the target river satisfies The degree of determination is used for the supervision and management of ecological flow.

Description

technical field [0001] The invention relates to the technical field of river and lake ecological flow supervision and management, in particular to a method system for identifying dehydration of river courses. Background technique [0002] In recent years, with the growth of population and economic development, due to the limitation of natural endowment conditions, irrational development and utilization, and global climate change, the conflicts between life, production and ecological water use in some basins are still prominent, and the ecological flow of rivers and lakes is difficult to guarantee. Problems such as river cut-off, lake shrinkage, biodiversity loss, and decline in ecological service functions are still severe. Strengthening the supervision and management of ecological flow and ensuring the healthy development of rivers and lakes is an important basic work for the conservation, development, utilization, protection, allocation and regulation of water resources, a...

AI Technical Summary

Problems solved by technology

[0004] Due to the wide range of ecological flow and the huge workload, the traditional water resources investigation methods and dynamic monitoring technology are time-consuming and costly. Provide effective technical support

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