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Calculation method for inquiring into river channel local inflow

A calculation method, the technology of the river course, applied in the direction of calculation, instrumentation, electrical digital data processing, etc.

Inactive Publication Date: 2015-03-25
WUHAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] When the current method is used to calculate the interval inflow, the estimated value of the interval inflow obtained when the calculation period is short (such as one hour) will appear negative

Method used

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  • Calculation method for inquiring into river channel local inflow
  • Calculation method for inquiring into river channel local inflow
  • Calculation method for inquiring into river channel local inflow

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Embodiment Construction

[0023] Compared with the traditional method, the present invention can select a shorter calculation period step (one hour) to calculate the interval inflow, make full use of all the observed water level information, and establish the continuity equation of the interval inflow (that is, the interval flow in this period is approximately equal to the previous One-period interval flow) as the state equation; at the same time, considering the error of the observed water level at the downstream station, the observation equation is established; based on the state equation and observation equation, the state (interval inflow) is estimated using the data assimilation technology considering constraints, and the river interval avoiding negative values ​​is obtained flow process. At the same time, more accurate parameters can be obtained by assimilating Muskingum parameters as model state variables.

[0024] like figure 1 As shown, the technical solution of the present invention specific...

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Abstract

The invention discloses a calculation method for inquiring into river channel local inflow. Water level observation data and the like of upstream stations and downstream stations serve as bases, and according to an established state equation and an established observation equation, the inquiry into the local inflow process is conducted through a data assimilation algorithm. The method can be applied to inquiring into the local inflow, compared with the prior art, smoothness of the local inflow can be guaranteed through the method, negative values and other abnormal data of flow are avoided, parameters of a Muskingum method can be accurately estimated, and the estimation accuracy of the local flow is improved.

Description

technical field [0001] The invention relates to the technical field of hydrological measurement, in particular to a calculation method for estimating the inflow of a river course interval. Background technique [0002] The inflow of river intervals is the basic data for hydrological forecasting and reservoir scheduling. For example, in the process of flood forecasting, the study of the impact of interval inflows on downstream flood peaks is of great significance for understanding the formation of downstream flood peaks and formulating engineering measures and countermeasures for downstream flood control points. Due to the limitation of the lack of hydrological data, the interval flow data cannot be directly obtained; and there are great uncertainties in the estimation of the interval inflow, which makes it difficult to guarantee the accuracy of the hydrological forecast results. Accurate interval flow data is also the cornerstone of correct reservoir flood control dispatchi...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 邓超刘攀张旺李泽君
Owner WUHAN UNIV