Riverway type reservoir underwater terrain modeling method independent of measured data

Abstract

The invention discloses a riverway type reservoir underwater terrain modeling method independent of measured data. Based on the publicly acquired DEM and reservoir distribution data, the rapid reconstruction of the underwater terrain of the reservoir can be realized. According to the method, known elevation information of upstream and downstream of a reservoir is utilized to speculate the longitudinal section of a river channel in a reservoir area, the longitudinal section is used as a terrain skeleton to generate a series of river channel cross sections, and known elevation information of twosides of the reservoir is utilized to speculate elevation information of underwater areas of the river channel cross sections. And finally, the method includes generating the underwater terrain of the reservoir based on the elevation prediction point of the reservoir area. The method is independent of field measured data, can quickly reconstruct the underwater topography of the reservoir, can beapplied to dynamic change monitoring of the reservoir capacity of the large-area-scale reservoir, and can provide method support for hydrology and water resource science research, reservoir information supervision and the like under the global change background.

Description

Technical field [0001] The invention belongs to the field of hydrology and geomorphology, and particularly relates to a river-type reservoir underwater terrain modeling method independent of actual measurement data. Background technique [0002] Reservoir is an important facility for water resources management, and it usually has multiple functions such as flood blocking, water flow regulation, and hydroelectric power generation. According to the International Commission on Large Dams Groups, there are more than 58,000 reservoirs worldwide, and the number is still increasing. Especially in the second half of the 20th century, developing countries set off a peak of reservoir construction. Newly built reservoirs promoted the efficient use of water resources, but also brought a series of ecological and environmental problems (vanBemmelen et al., 2016; Yigzawet al. ,2018). [0003] Mastering the spatial information of the reservoir is an important foundation for the efficient utiliza...

AI Technical Summary

Problems solved by technology

The existing direct measurement method and spatial extrapolation method both need the support of field measurement data, which limits their application in data-missing areas, and it is difficult to support large-scale or even global-scale research.

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