A method and device for calculating river water level and flow combined with groundwater infiltration

Abstract

The embodiment of the invention provides a method and a device for calculating the water level and discharge of a river course in combination with groundwater infiltration, wherein the method comprises the following steps: determining each calculation section in the river course; collecting cross-sectional parameters corresponding to the calculated cross-sections; inputting section parameters corresponding to each calculation section into a preset calculation model to obtain water level and discharge information of each calculation section at a preset time; calculating a water level dischargeof the river based on the water level discharge information of each of the calculated sections at a preset time. Through the calculation method provided by the embodiment of the invention, the groundwater infiltration is separately considered from the side inflow on the basis of the Saint Venant equation system, the interaction relationship between the river flow and the groundwater is reflected from the physical mechanism, and the precision of the simulation result can be further improved by increasing the groundwater infiltration term. Moreover, the parameters needed in the simulation calculation are easy to collect, which makes the method easy to be realized and applied.

Description

technical field [0001] The invention relates to the technical field of hydrodynamics, in particular to a method and device for calculating river water level and flow combined with groundwater infiltration. Background technique [0002] At present, Saint-Venant's equations are widely used in the simulation of river flow. In the simulation process, groundwater infiltration is usually not considered separately, but is calculated as side inflow. On the one hand, the physical mechanism of groundwater infiltration is ignored, and it is difficult to reflect The interaction between river flow and groundwater; on the other hand, the simulation effect is not good for river sections with active groundwater infiltration or small floods. In fact, in recent years, intense human activities have caused great changes in the underlying surface conditions of the basin, and the river flow behavior has also changed accordingly. In order to better simulate the river flow, groundwater infiltration...

AI Technical Summary

Problems solved by technology

[0005] Deficiency 1. The traditional Saint-Venant equations calculate the groundwater infiltration item as a side inflow, which is difficult to reflect the interaction between surface water and groundwater from a physical mechanism;

[0006] Defect 2. Based on the coupling of Horton's infiltration formula with Maskin's heel method or St. Venant's equations, it is easy to implement and apply. However, because Horton's formula is empirical, the physical mechanism of the coupling model is weak, and due to the steady seepage rate is difficult to obtain, so the application effect needs to be further improved

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