Remote sensing evaluation method of lake water reserves based on multispectral images

Abstract

The invention provides a remote sensing evaluation method of lake water reserves based on multispectral images. The remote sensing evaluation method includes: according to lake water body spectral response characteristics in different bands of multispectral remote sensing images, extracting water body indexes which reflect lake water surface distribution characteristics; according to the extracted water body indexes, obtaining lake water body boundaries, giving actually-measured lake water level information to the lake water body boundaries, and generating lake equal water level line data sets according to different periods of the lake water body boundaries; according to the lake equal water level line data sets, simulating lake underwater topography; and calculating the lake water reserves in different periods according to the simulated lake underwater topography and actually-measured water level data. According to the remote sensing evaluation method, the lake underwater topography is monitored through utilization of multispectral satellite remote sensing data, the utilized satellite remote sensing data substantially can be obtained for free, and the remote sensing data has the advantages of wide space coverage areas and rapid refreshing speed, so that compared with conventional field actual-measurement methods, the remote sensing evaluation method provided by the embodiment of the invention has the advantages of low monitoring cost, convenient refreshing, and possibility of wide-range popularization and application.

Description

technical field [0001] The invention relates to the fields of satellite remote sensing and earth observation, in particular to a method for remote sensing estimation of lake water storage based on multispectral images. Background technique [0002] Lakes (including natural lakes and artificial ponds) are the most important form of surface water resources. Lake water is the second largest type of surface water resource after glaciers and permanent snow cover, and it is one of the major contributors to global sea level change. Lake evolution is closely related to environmental changes: on the one hand, changes in water volume and sedimentary environment caused by lake level fluctuations can sensitively indicate climate change; influences. However, for a long time, due to the limitations of survey and observation data, simulation and analysis methods, people have been unable to accurately obtain large-scale lake water resources and describe their dynamic changes, which has se...

AI Technical Summary

Problems solved by technology

Although these methods can partially solve the problem of acquisition and update of underwater terrain data, they cannot be widely applied due to the limitation of measurement cycle and cost.

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