Mountainous area reservoir area riverway water surface width estimation method

Abstract

The invention relates to a mountainous area reservoir area riverway water surface width estimation method. Further development is made on the basis of a river width model constructed under the naturalcondition, the relative reasonable and reliable mountainous area reservoir area riverway width estimation method is provided, the distributed model confluence calculation accuracy is improved, the problem about estimation of the small and medium-sized basin mountainous area reservoir area riverway width lake of observational data is solved, important essential data are provided for reservoir flood control regulation, hydraulic power generation, channel improvement and the like, the reservoir regulation scientificity is improved, and safety of downstream zones can be better and practically protected. The mountainous area reservoir area riverway water surface width estimation method is mainly applied to a drainage basin digital elevation model, data sources are stable and reliable, the computational efficiency is high, the result is objective and reasonable, automation generation of drainage basin riverway width and direct calling of a distributed hydrologic forecasting model are facilitated, and the development of digital hydrology, the distributed hydrologic forecasting model and reservoir scientific management is promoted.

Description

technical field [0001] The invention relates to the technical field of hydrology, in particular to a method for estimating the water surface width of a mountainous reservoir area. Background technique [0002] The drainage area of ​​our country is 200 to 3000km 2 There are nearly 9,000 small and medium-sized watersheds in China. Most of these small and medium-sized watersheds are located in mountainous areas. The water and soil conditions along the coast of the watershed are good, with a lot of cultivated land and dense population. Once a flood occurs, it will seriously threaten the safety of people's lives and property. Under the new historical conditions, carrying out the management of small and medium-sized rivers and improving the flood control capacity of small and medium-sized rivers has become a major problem that needs to be solved urgently. The construction of reservoirs is an important method to improve the flood control capacity of small and medium-sized rivers. ...

AI Technical Summary

Problems solved by technology

[0004] Reservoirs are often built upstream in small and medium-sized watersheds in mountainous areas, and the water level rises significantly during the impoundment period, resulting in an increase in the width of the river channel in the reservoir area, which does not meet the river phase relationship under natural conditions. The inaccurate estimation of the channel width in the mountainous reservoir area limits the channel The application of the width parameter in distributed modeling is not conducive to the development of domestic distributed hydrological models

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