Reduction method of natural average daily water and sediment process of reservoir dam site
A technology for reservoirs and dam sites, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of large time scale and low calculation accuracy
Active Publication Date: 2017-02-08
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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[0004] The main technical problem to be solved by the present invention is to provide a method for restoring the natural daily average water-sediment process of a large-scale river-type reservoir dam site based on a water-sediment mathematical model, which can solve the problems of large time scale and low calculation accuracy in the prior art
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[0043] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.
[0044] A method for restoring the natural daily average water-sediment process of a large-scale river reservoir dam site based on a water-sediment mathematical model, which includes the following steps:
[0045] Step 1. Collect data on the process of water and sediment flowing into the reservoir, the process of water and sediment leaving the reservoir, the process of water level in front of the dam, the relationship between the water level and flow of the river section and the section at the dam site, etc.;
[0046] Step 2. Establish a one-dimensional unsteady flow hydrodynamic model of the reservoir. According to the flow in and out of the reserv...
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The invention discloses a reduction method of the natural average daily water and sediment process of a reservoir dam site. The reduction method comprises the following steps of: S1: collecting data including a reservoir main stream and tributary inflow water and sediment process, an outflow water and sediment process, a water-level-before-dam process, the stage-discharge relationship of a river section, the stage-discharge relationship of a dam site section and the like; 2: establishing a one-dimensional unsteady flow hydrodynamic model of the reservoir, and adopting a method of the day-by-day evolution calculation of water flow hydrodynamic force to obtain an average daily inflow discharge process of a reservoir interval according to inflow and outflow discharge and the water-level-before-dam process; 3: establishing a one-dimensional unsteady flow water and sediment mathematical model of the reservoir, controlling a model outlet boundary by the stage-discharge relationship of the dam site section, and aiming at the inflow water and sediment process and the average daily inflow discharge process of the interval to adopt a mathematical model to carry out calculation to obtain the natural average daily water and sediment process of the dam site under a hypothesis that no reservoirs are in the presence. By use of the reduction method, the natural average daily water and sediment process of the large reservoir dam site can be reduced, and a technical support can be provided for evaluating the influence of reservoir construction on the water and sediment process.
Description
technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a method for restoring the natural daily average water and sediment process at a reservoir dam site. Background technique [0002] my country is rich in hydropower resources, and there are many reservoirs in the main and tributary streams. The construction of reservoirs has a great impact on the water and sediment process downstream of the dam, especially the large comprehensive reservoirs built on the main stream. The impact of large-scale reservoirs on river water and sediment processes is directly related to the scientific regulation of reservoirs, decision-making for flood control downstream of dams, and river management. Carrying out the restoration calculation of the natural water and sediment process at the dam site of a large reservoir can obtain the water and sediment process at the dam site under the assumption that the dam site does not have a res...
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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 黄仁勇
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION