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Distributed hydrological model parallel computing method based on flow direction

A distributed hydrology and parallel computing technology, applied in design optimization/simulation, special data processing applications, etc., can solve the problems of unable to meet the real-time simulation and forecast requirements of distributed hydrological models, large amount of calculation, waste of resources, etc., to achieve Effects of Model Computational Efficiency

Pending Publication Date: 2022-05-10
HOHAI UNIV
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Problems solved by technology

However, complex calculations lead to a large amount of calculations and intensive calculations in large watersheds with long warm-up periods and high resolutions. It takes a lot of time to generate forecast results, which also leads to a waste of resources.
Therefore, the traditional serial computing method can no longer meet the real-time simulation and forecasting requirements of the distributed hydrological model in the above situation

Method used

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  • Distributed hydrological model parallel computing method based on flow direction
  • Distributed hydrological model parallel computing method based on flow direction
  • Distributed hydrological model parallel computing method based on flow direction

Examples

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Embodiment 1

[0045] Example 1: In this example, an experiment is carried out on the calculation of the grid Xin'anjiang model in the Tunxi River Basin of Anhui Province. The model split and calculation process are as follows: figure 2 , image 3 and Figure 4 shown, including the following steps.

[0046] In this implementation, the Tunxi River Basin in Anhui Province is selected, and the grid Xin'anjiang model is serially calculated according to different warm-up periods to obtain the running time of the model. On the basis of the original model, the grid Xin'anjiang model is improved by adopting the parallel algorithm (GFD) based on grid flow direction division proposed by the present invention. Get the parallel computing time and compare the serial computing time

[0047] In step S1, the model is uniformly constructed, and the parameters of the distributed hydrological model are described based on NetCDF. For the calculation function of the module, the components are divided, and the...

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Abstract

The invention discloses a distributed hydrological model parallel computing method based on a flow direction. The distributed hydrological model parallel computing method comprises the following steps: providing a parameter description method based on a NetCDF (Network Common Data Format); standardized construction of the distributed hydrological model is realized; realizing watershed discretization and grid construction; according to the river relation and the confluence relation, a parallel calculation sequence is extracted, and distributed hydrological model parallel calculation is achieved; according to the method, the traditional serial calculation mode of the distributed hydrological model is changed, and the model calculation efficiency is improved based on the grid flow division (GFD).

Description

technical field [0001] The invention belongs to hydrological model prediction technology, in particular to a parallel computing method for a distributed hydrological model based on flow direction. Background technique [0002] The hydrological model is an important tool for flood forecasting and hydrological mechanism research. It uses mathematical methods to describe, simulate and reproduce the hydrological cycle process, and simulates the rainfall runoff formation process within the basin scale to achieve the purpose of determining the hydrological response of the basin. The hydrological model provides important decision-making support for flood forecasting and flood control scheduling. [0003] According to the description of the hydrological process, combined with the characteristics of the watershed, the hydrological model can be divided into a lumped hydrological model and a distributed hydrological model. The lumped hydrological model is expressed by ordinary diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 张洋铭万定生余宇峰
Owner HOHAI UNIV
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