River flow continuous measurement method based on satellite big data

Abstract

The invention discloses a river flow continuous measurement method based on satellite big data. The method comprises a flow test reach determination method, a satellite big data river channel section reconstruction method, a multi-satellite information coupling real-time water level calculation method and a flow calculation and reorganization method. According to the invention, the problem of difficult test or continuous measurement of river flow in an unmanned area can be solved, the blank of a satellite flow test method based on a river dynamics principle is filled, and the range and density of river flow test can be greatly improved.

Description

technical field [0001] The invention relates to a method for measuring river flow by satellite, in particular to a method for continuously measuring river flow based on satellite big data, and belongs to the technical field of hydrological test applications. Background technique [0002] At present, satellite remote sensing and surveying and mapping technology have been widely used in various fields of the national economy, and in the field of hydrological survey, there are also applications in water level and flow monitoring. Existing satellite flow measurements mostly use the water level or water surface width observed by satellites, and are calculated through the relationship between water level and flow or water surface width and flow relationship with existing hydrological stations on the ground. Therefore, no matter what kind of satellite is used for flow measurement, the measurement information of existing ground hydrological stations is required for calibration or ve...

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Problems solved by technology

[0003] In recent years, the plane or vertical resolution of satellites has been further improved. Altimeters such as lasers and radars installed on satellites can measure water levels with accuracy within 10cm, and the plane resolution of high-precision panchromatic orthophotos can reach within 50cm. However, the two types of satellite plane and elevation information are often not available at the same time or the resolution is low

With the launch of surveying and mapping satellites such as the Resource Series and Gaofen Series, and the implementation of future plans such as surface water or ocean terrain satellites (SWOT), the ability to monitor the elevation and slope of surface water is already available and the accuracy will gradually increase, but the plane and vertical The resolution is tens of meters, and it cannot meet the requirements of river flow measurement when used alone

At the same time, no matter what kind of satellites can only carry out plane or elevation information observation above the water surface, they cannot obtain section or terrain data below the water surface

[0004] For a large number of rivers without existing hydrological stations and lack of underwater section information, especially in many uninhabited areas in western my country, there is currently no mature satellite flow measurement method

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