River water reduction and dehydration identification method and system

Abstract

The invention discloses a river water reduction and dehydration identification method and system. The method comprises the following steps: acquiring remote sensing image data in a covered river channel in different periods, wherein the different periods comprise a dry season and a wet season; calculating an MNDWI synthesis index based on the remote sensing image data in different periods; extracting water body information in different periods according to the MNDWI synthesis index, and determining water body areas in different periods based on the water body information in different periods; obtaining a relation curve of the river flow and the water body area; determining the river flow in different periods based on the relation curve and the water body areas in different periods; and recognizing the water reduction and dehydration of the river channel based on the river channel flow in different periods. According to the method, remote sensing image data covering a riverway is collected and preprocessed, MNDWI in the dry season and the wet season is generated, river water body information in the dry season and the wet season is effectively and efficiently extracted, water reduction and dehydration analysis is conducted on the target riverway, the ecological flow satisfaction degree of the target riverway is determined, and the method is used for supervising and managing the 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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