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River flow field real-time prediction method in sudden accident state

A sudden accident, real-time prediction technology, applied in the field of environmental modeling, to achieve the effect of improving calculation accuracy

Pending Publication Date: 2022-03-18
HOHAI UNIV
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  • Claims
  • Application Information

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Problems solved by technology

Theoretically, the number of tides can be infinite, but only a limited number are taken in actual analysis and calculation.

Method used

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  • River flow field real-time prediction method in sudden accident state
  • River flow field real-time prediction method in sudden accident state
  • River flow field real-time prediction method in sudden accident state

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Embodiment 1

[0034] A method for real-time prediction of river flow field under emergency conditions, such as figure 1 As shown, the specific steps are as follows:

[0035] (1) Combined with the actual situation, select hydrological stations for prediction, collect long-sequence hydrological data of hydrological stations, collect the terrain elevation of the river sections where they are located, and clarify the distribution of environmentally sensitive points to construct a two-dimensional hydrodynamic model of the Yangtze River.

[0036] In this embodiment, the stations in the middle and lower reaches of the Yangtze River in 2013 in the "Hydrological Yearbook" are used: Baozhen, Lingdian Port, Jiangyin, Zhenjiang, and Ma'anshan stations.

[0037] (2) Calculate the harmonic constants of each hydrological station (i.e. M2, S2, O1, K1, etc.), and use the T-tide tide harmonic analysis and forecast to obtain the tidal level harmonic constants of each hydrological station during the wet season...

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Abstract

The invention discloses a river flow field real-time prediction method in a sudden accident state, and the method comprises the steps: building a two-dimensional hydrodynamic model through collecting the long sequence data of each hydrological (tide level) station and flow station and the runoff data of an upstream hydrological station; on the basis of the constructed hydrodynamic model, in combination with current sea level information, issued by a hydrological department in real time, of the hydrological station, tide level values of the hydrological station in the next few days are calculated through a T-tide tide analysis toolkit; and inputting the predicted tide level value as a boundary condition into the hydrodynamic model to carry out flow field prediction in the next few days, thereby realizing simulation prediction in an unexpected accident state. According to the prediction method, the flow field of the tidal river in several days in the future can be predicted in real time after the sudden water pollution accident, and technical support is provided for pollution emergency decision management.

Description

technical field [0001] The invention belongs to the field of environmental modelling, and in particular relates to a real-time prediction method for river flow field in an emergency state. Background technique [0002] Under sudden accidents, after pollutants enter the tidal river, the degree of impact on the downstream sensitive targets is greatly affected by the flow of the water body (flow velocity, flow direction, flow rate, etc.). The basis for emergency management of tidal river accidents. At present, the prediction methods for river flow field have become more and more mature. Common models such as EFDC model and MIKE21 model can simulate river flow field, but they focus on the simulation of past accidents. The prediction method of river flow field has not yet formed a system. The key point of forecasting the flow field of tidal rivers is to simulate and calculate the entire river flow field through tide level prediction. [0003] Tides represent the total tidal co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06Q10/06G06Q50/26
CPCG06F30/28G06Q10/0635G06Q50/26
Inventor 胡祉冰逄勇胥瑞晨张鹏陈潮
Owner HOHAI UNIV
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