Remote sensing inversion method and system for water meter salinity of estuary region based on satellite-ground collaboration,

Abstract

The invention provides a remote sensing inversion method and system for the water meter salinity of an estuary region based on satellite-ground collaboration, on one hand, high-precision ground actual measurement data of the estuary region are utilized, synchronous ground actual measurement site actual measurement data serve as output data to construct a model, and the inversion precision of the remote sensing inversion model is improved; on the other hand, the situation that a traditional remote sensing inversion model inverts the water meter salinity only through spectral information or indirect water quality parameters is improved, geographic grid information is added to serve as input parameters, and the longitude and latitude information of a ground actual measurement site and a remote sensing image and the data characteristic of spatial continuity of the remote sensing image are fully utilized; and the method and system are especially suitable for realizing high-precision inversion of the salinity of the water meter in the complex estuary region.

Description

technical field [0001] The invention relates to the field of water environment monitoring, and more specifically, to a remote sensing retrieval method and system for water surface salinity in an estuary area based on satellite-ground coordination. Background technique [0002] Salt tide is a unique natural phenomenon in the estuary area. Salt tide intrusion refers to the phenomenon that the high salt water outside the estuary is transported and mixed upward along the estuary with the ebb and flow of the tide, causing the water body in the upstream channel to become salty. In recent years, due to factors such as dry winter water in the Pearl River Basin, sea level rise, and river incisions, salt tides have occurred frequently in the Pearl River Estuary, endangering people's production / living safety and the surrounding water ecological environment, and seriously affecting the Guangdong-Hong Kong-Macao Greater Bay. water security in the area. Effective monitoring of water sali...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of strong experience and poor universality of the above-mentioned water surface salinity retrieval model based on optical remote sensing, and propose a remote sensing retrieval method of water surface salinity in the estuary area based on satellite-ground coordination. The relatively high ground measured data in the estuary area improves the inversion accuracy of the remote sensing inversion model; on the other hand, the traditional remote sensing inversion model is improved to invert the water surface salinity only through spectral information or indirect water quality parameters, and the geographic grid information is added. As an input parameter, it makes full use of the spatially continuous data characteristics of remote sensing images to achieve high-precision inversion of water surface salinity in the estuary area

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