Method for simulating flood routing by solving Saint-Venant equations through channel storage increment relationship

A technique of incremental relationship and equation system, applied in the field of flood control and disaster reduction science, which can solve the problems of difficult detailed analysis of the complex water flow situation and main characteristics of river channels, difficult time and space distribution, dynamic simulation of flood evolution process, rough generalization, etc.

Inactive Publication Date: 2011-01-26
湖北省汉江河道管理局
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Problems solved by technology

The disadvantages are: ① the generalization is relatively rough, and it is difficult to analyze the complex flow regime and main characteristics in the river channel in detail; ② it is difficult to provide the time and space distribution of the water level in the river section and dynamically simulate the evolution process of the flood in the river section

Method used

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  • Method for simulating flood routing by solving Saint-Venant equations through channel storage increment relationship
  • Method for simulating flood routing by solving Saint-Venant equations through channel storage increment relationship
  • Method for simulating flood routing by solving Saint-Venant equations through channel storage increment relationship

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Embodiment 1

[0046] according to figure 1 The comparison chart of the calculated and measured water level process line of the Dujiatai Gate in 1983 obtained by using the method of solving the Saint-Venant equations to simulate the flood evolution by using the relationship between the storage and storage increment described above, and analyzing the flood in 1983 from the Dujiatai Gate to the Zhoubang River section Roughness coefficient when

[0047] The section from Dujiatai Gate to Zhoubang River (ie Hongdao) is about 21km long, and the starting and ending points are Dujiatai Gate and Zhoubang respectively.

[0048] Using 28 cross-sections of the flood channel measured in 1998, the measurement sections are numbered from 1 to 28, the measurement accuracy is at the level of IV, and the elevation of the sections is the base level of the Yellow Sea.

[0049] The observed water level under Dujiatai Sluice and around it is the frozen Wusong base, and the conversion relationship is: frozen Wuso...

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Abstract

The invention relates to a method for simulating flood routing by solving Saint-Venant equations through a channel storage increment relationship, which comprises the following steps of: simplifying Saint-Venant basic simultaneous differential equations into a water balance equation and dynamic equations in delta t time interval, and respectively calculating the channel storage increment of a reach according to the water balance equation and the dynamic equations, namely calculating the channel storage increment according to the water balance equation and calculating the channel storage increment according to two dynamic equations at the beginning of and at the end of the time interval. The channel storage increments of the reach calculated by the two methods are equal, so a new and reliable method is provided for simulating the flood routing by solving the Saint-Venant equations by a hydraulic method and plays an important role in the aspects of reasonable determination of flood control project scale, flood forecasting, scientific flood dispatching and the like in river channels, channels, flood diversion and storage areas and reservoirs.

Description

technical field [0001] The invention relates to the scientific and technical field of flood control and disaster reduction, in particular to a method for simulating flood evolution by solving St. Venant's equations according to the relationship between the water balance equation and the storage increment of the dynamic equation. Background technique [0002] my country is a country where floods occur frequently. 1 / 2 of the country's population, 1 / 3 of the arable land and major cities are below the flood level of rivers. The industrial and agricultural output value of areas threatened by floods accounts for 2 / 3 of the country. In order to achieve the purpose of mitigating flood disasters and using water resources to serve national economic and social development, a mathematical model for simulating flood evolution is established, and the scale of flood control projects, flood forecasting, and scientific flood dispatching are reasonably determined in river courses, channels, fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B1/00E02B3/00
CPCY02A10/11
Inventor 杜佐道杜曲
Owner 湖北省汉江河道管理局
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