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Coupling method of lumped hydrological model and two-dimensional hydrodynamic model

A hydrological model and hydrodynamic technology, applied in instrumentation, design optimization/simulation, calculation, etc., can solve the problems of small time step, complex calculation process, low efficiency of fine calculation of hydrodynamic model, etc., to reduce errors and Uncertainty, computationally simple effects

Active Publication Date: 2018-12-28
PEKING UNIV +1
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Problems solved by technology

but cannot be coupled with hydrodynamic models at the basin-wide scale
The two-way coupling method is based on the simultaneous calculation of the hydrological model and the hydrodynamic model, and exchanges boundary values ​​at each time step; its disadvantage is that the calculation process of the hydrodynamic model is relatively complicated, and the time step is small, which is different from that of the hydrological model. There are differences in time and space scales, and special treatment is required in the coupling process; at the same time, when calculating large-scale watersheds, due to the low efficiency of hydrodynamic models for fine calculations, there are limitations in practical applications

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[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0029] The invention proposes a coupling method of a lumped hydrological model and a two-dimensional hydrodynamic model, which can couple the outlet section runoff process calculated by the lumped hydrological model with the whole basin calculation process of the two-dimensional hydrodynamic model. The coupling framework for the lumped hydrological model and the two-dimensional hydrodynamic model is not limited to a certain hydrological model / hydrodynamic model, and has certain universality.

[0030] Such as figure 1 As shown, t...

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Abstract

The invention provides a coupling method of a lumped hydrological model and a two-dimensional hydrodynamic model, 1, data processing: acquiring and proces that basic data required by the lumped hydrological model and the two-dimensional hydrodynamic model, wherein the computing grid of the hydrodynamic model and the grid data of the land use raster are adopt with the grid data of the DEM raster data of the elevation data, and the grid data of the DEM raster data of the land use raster are used with the DEM raster data; 2, constructing a hydrological model and calculating: construct a lumped hydrological model based on basic data; 3, a coupling method: adopting a downscaling method to make that obtain runoff process consistent with the temporal and spatial scales of the hydrodynamic model;4, constructing and calculating that hydrodynamic model: reading the downscaled runoff grid data into the hydrodynamic model for calculation, and obtaining the spatial distribution of flood eigenvalue. The invention has relatively low data requirements and can be applied to regions with little or no data. The coupling part is simple and reduces the errors and uncertainties in numerical computation.

Description

technical field [0001] The invention relates to the technical field of coupling calculation of a hydrological model and a hydrodynamic model, in particular to a coupling method of a lumped hydrological model and a two-dimensional hydrodynamic model. Background technique [0002] The lumped hydrological model is an important tool in the current study of flood forecasting in river basins. The mathematical equations used in the lumped hydrological model usually do not consider the spatial differences of the characteristics of the underlying surface of the basin, the hydrological process, and the input variables of the model. Some hydrological processes in the model are usually described by some simplified hydraulic formulas or empirical formulas , so the lumped watershed hydrological model belongs to the category of conceptual models. The lumped hydrological model takes the system as the research object. Although the physical meaning of some parameters is not clear and often h...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20Y02A10/40
Inventor 杨小柳王月玲
Owner PEKING UNIV
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