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A Prediction Method of Sand Peak Propagation Time in Three Gorges Reservoir Flood Season

A forecasting method and technology of propagation time, applied in forecasting, data processing applications, instruments, etc., can solve the problems of large amount of data, difficult forecasting, and time-consuming data collation, etc.

Active Publication Date: 2018-12-21
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide a rapid prediction method for the propagation time of sand peaks in the flood season of the Three Gorges Reservoir. Calculations are very inconvenient

Method used

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  • A Prediction Method of Sand Peak Propagation Time in Three Gorges Reservoir Flood Season
  • A Prediction Method of Sand Peak Propagation Time in Three Gorges Reservoir Flood Season
  • A Prediction Method of Sand Peak Propagation Time in Three Gorges Reservoir Flood Season

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Embodiment 1

[0021] The annual average runoff and sediment discharge of Cuntan Station account for about 80% and 90% of the Three Gorges dam site, so the Cuntan Hydrological Station at the tail stream of the Three Gorges Reservoir is selected as the Shafeng Ingress Station, and the Shafeng Outbound Station is selected as the Huanglingmiao hydrological station located 12km downstream of the dam;

[0022] On July 24, 2012, sand peaks entered the reservoir at Cuntan Station of the Three Gorges Reservoir, and the daily average sand concentration of sand peaks measured at Cuntan Station was collected. 寸 2.33kg / m 3 , the average daily water level in front of the dam on the day when the sand peak appeared at Cuntan Station was 157.16m, and the corresponding flood detention storage capacity V 起始 24.2688 billion m 3 , at the same time, the average daily flow Q of entering Cuntan Station and leaving Huanglingmiao Station on the day when the sand peak appeared at Cuntan Station was also collected ...

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Abstract

The invention discloses a method for quickly predicting sediment peak propagation time of the three gorges reservoir in a flood season. The method comprises the steps of 1, selecting a reservoir tail main stream control hydrological station of the three gorges reservoir as an inflow control station, and selecting a nearest main stream control hydrological station of the downstream part of a dam of the three gorges reservoir as an outflow control station; 2, collecting sediment content S<inflow> of daily mean sediment peak of the inflow control station, flood detention storage capacity V<initial> corresponding to daily mean water level before dam on the day when the sediment peak occurs in the inflow control station, and daily mean flow Q<inflow>1 and Q<outflow>1 of the inflow control station and the outflow control station on the day when the sediment peak occurs in the inflow control station; and 3, performing calculation according to a formula defined in the specification to obtain propagation time T<outflow and inflow> of the sediment peak from the inflow control station to the outflow control station. According to the method for quickly predicting the sediment peak propagation time, the sediment peak propagation time of a reservoir area can be quickly predicted, so that a favorable sediment sluicing opportunity can be seized and the sediment sluicing efficiency can be improved; and moreover, a riverway terrain, inflow and outflow water and sediment processes, a water-level-before-dam process and a water and sediment transport mathematic model are not needed, little data is needed and is easy to obtain, the calculation is simple and convenient, and the precision is relatively high.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a method for quickly predicting the propagation time of sand peaks in the flood season of the Three Gorges Reservoir. Background technique [0002] According to the statistics of actual measurement data, after the water storage of the Three Gorges Reservoir is put into use, the time for the incoming flood peak to reach the front of the dam has been shortened from about 54 hours before the water storage to about 6 to 12 hours, while the time for the incoming sand peak to reach the front of the dam has been shortened. Then it was extended from about 2 to 3 days before water storage to about 3 to 8 days. The dissimilation of water-sediment phase makes the peak of sand passing through the reservoir lag behind the peak of flood, the hydrodynamic conditions of sand transport from the reservoir weaken, the sand peak attenuates along the way, and the sand discharge ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04
CPCG16Z99/00Y02A10/40
Inventor 黄仁勇王敏蔺秋生崔占峰胡德超葛华赵瑾琼毛冰申康邓春艳元媛范北林张细兵张杰宫平黄莉黄卫东刘同宦杨光荣李荣辉赵燕
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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