Parallel programming and modular method based distributed hydrologic model calibration method

A distributed hydrology and hydrological model technology, applied in the direction of instrumentation, design optimization/simulation, calculation, etc., can solve the problems of long time consumption, low accuracy and low efficiency of distributed hydrological model, and achieve the objective and accurate parameter determination process. High, avoids subjectivity effect

Active Publication Date: 2017-05-24
ZHEJIANG UNIV
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Problems solved by technology

[0005] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a distributed hydrological model calibration method based on parallel programming and module method, to solve the problem of time-consuming, low efficiency and low precision in the calibration process of distributed hydrological models. advanced questions

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  • Parallel programming and modular method based distributed hydrologic model calibration method
  • Parallel programming and modular method based distributed hydrologic model calibration method
  • Parallel programming and modular method based distributed hydrologic model calibration method

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. In order to highlight the advantages of the present invention, the variable infiltration capacity model VIC proposed by the University of Washington is used as a case for specific implementation.

[0046] Such as figure 1 As shown, a kind of distributed hydrological model calibrating method based on parallel programming and module method of the present invention comprises the following steps:

[0047] Use arcgis to extract and process the geographic information system data and digital elevation model data of the target watershed, and obtain data such as watershed DEM, flow direction and outline, and the grid size is 5×5.

[0048] Prepare the vegetation parameter, soil parameter and meteorological parameter files required by the model, and the resolution of the file is 5×5.

[0049] The vegetation type adopts the global 1km soil cover classifica...

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Abstract

The invention discloses a parallel programming and modular method based distributed hydrologic model calibration method and aims to improve calibration efficiency and simulation precision of a basin hydrologic model. The method includes: 1) on the basis of a parallel programming environment constructed based on MPICH, coupling a source program of the open-source distributed hydrologic model with a multi-objective optimization algorithm; 2) calibrating the hydrologic model aiming at a daily runoff sequence and a peak value sequence respectively, and establishing corresponding model frames; 3) adopting a modular method for combining runoff outputs of the models to form recombined simulation runoff. The parallel programming and modular method based distributed hydrologic model calibration method has advantages that by parallel multi-objective operation, calibration efficiency of the distributed hydrologic model can be effectively improved while calibration time is shortened; the modular method takes full advantages of a peak value model and a daily runoff model, and accordingly simulation precision can be improved remarkably.

Description

technical field [0001] The invention relates to the technical field of hydrological models, in particular to a distributed hydrological model calibrating method based on parallel programming and module method. Background technique [0002] With the intensification of urban expansion and climate change, natural disasters such as floods and droughts occur more and more frequently, which seriously threaten the national economy and the safety of people's lives and property. Use the basin hydrological model to accurately simulate and forecast the process of floods and droughts important for disaster relief. [0003] Hydrological model parameter calibration is an important step in hydrological simulation, and the calibration of model parameters directly affects the forecast performance of hydrological model. The distributed hydrological model involves many parameters, and the calibration is complicated. Manual parameter adjustment is not only inefficient, but also consumes a lot ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 刘莉许月萍白直旭马迪
Owner ZHEJIANG UNIV
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