Finite element control based modeling method for distributed hydrological model

Abstract

The invention provides a finite element control based modeling method for a distributed hydrological model. The method comprises the steps of basin finite element division, finite element model generation and finite element control based distributed hydrological model generation. In the finite element division, linear scale of a basin hydrological phenomenon is considered from control density of a basin precipitation station, underlying surface attributes and basin flow concentration characteristics. A finite element model is a physical hydrological model with same or similar underlying surface attributes, and the finite element control based distributed hydrological model is formed through concentration of river networks according to river network distribution of basin. The change of the underlying surface attributes of the basin caused by human activities is adjusted by utilizing a finite element distribution control switch, and the change of water-holding capacity of the basin caused by the human activities is adjusted by a finite element model parameter control switch, thereby meeting hydrological simulation and forecasting requirements under the condition of human activity influence. The method has the advantages of short calculation time, easiness for parameter calibration, high adaptability, high calculation result precision and the like.

Description

technical field [0001] The invention relates to the field of hydrology, in particular to a distributed hydrological model modeling method controlled by finite elements. Background technique [0002] Aiming at the nonlinear problem of precipitation and runoff in watersheds, many distributed hydrological models have been proposed in the field of hydrology. The grid of the existing distributed hydrological model is the basis for dealing with the nonlinear problem of precipitation and runoff in the watershed. It converts the dispersion and discontinuity (mainly non-gradual change and abrupt change) of the change of the underlying surface of the watershed into gradual and continuous changes in the grid. , in order to use the linear method to deal with the nonlinear problem of precipitation and runoff in the watershed. [0003] At present, most distributed hydrological models only consider the lower limit of the linear scale of the watershed (that is, the grid is small enough) an...

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Problems solved by technology

[0007] The purpose of the embodiments of the present invention is to provide a modeling method of a distributed hydrological model controlled by finite elements, aiming to solve the problem that the same technology cannot effectively deal with the impact of changes in the underlying surface on the flow generation and confluence of the watershed, and the parameter calibration is difficult and the calculation time is long. question

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