A Confluent Parallel Method for Distributed Hydrological Models
A distributed hydrology and model technology, applied in multi-programming devices, design optimization/simulation, program startup/switching, etc., can solve problems such as inability to solve sub-basin dependencies, inability to directly parallelize calculations, and unsuitable confluence parallel calculations , to achieve the effect of speeding up the calculation speed and improving the calculation efficiency
Active Publication Date: 2020-05-05
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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The confluence module cannot be directly parallelized due to the dependent confluence mechanism
As far as parallel computing of distributed hydrological models is concerned, many scholars have studied parallel methods based on binary tree watershed coding, but there are many hydrological models that use Pfafstetter watershed coding for river network division. It is different, it cannot solve the dependency problem between sub-watersheds by itself, and it is not suitable for confluence parallel computing
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[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0024] The embodiment of the present invention provides a distributed hydrological model confluence parallel method, which is implemented according to the following steps:
[0025] S1. By determining the initial state of the parallel calculation of the confluence, that is, the dependency table of the upstream and downstream of the sub-basin, respectively mark the code number IX of the upstream and downstream sub-basins of the current sub-basin.
[0026] In step S1, the initial preparation for parallel computing needs to obtain the topological relationship table between the sub-basins, the table needs to h...
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The invention discloses a distributed hydrological model confluence parallel method, and relates to the technical field of water resource scheduling. According to the method, a parallel computing solution is provided for a Pfafter basin coded distributed hydrological model confluence module by fully considering a processing method of a dependency relationship between confluence module sub-basins at a coding angle; And OpenMP programming is used for parallel transformation, so that the calculation efficiency of the Pfafstetter coding-based distributed hydrological model confluence module is improved. Therefore, by adopting the method provided by the invention, the problem that the distributed hydrological model confluence process based on Pfafstetter coding cannot directly utilize OpenMP framework parallel computing in the prior art is solved, and the computing speed of the distributed hydrological model confluence process is increased.
Description
technical field [0001] The invention relates to the technical field of water resource scheduling, in particular to a method for converging and parallelizing distributed hydrological models. Background technique [0002] Distributed hydrological model is an effective means to explore and understand the process and mechanism of complex hydrological cycle, and it is also an effective tool to solve many practical problems in hydrology. played an important role in. The distributed hydrological model is computationally intensive, which is mainly reflected in: (1) The hydrological simulation of the watershed is highly complex, including the simulation of the runoff process of different underlying surfaces and the confluence of slopes and rivers. There are many intermediate variables in the calculation process. Data transmission is intensive; (2) Distributed hydrological models involve a large amount of grid or sub-basin data. With the development of remote sensing technology and ...
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IPC IPC(8): G06F30/20G06F9/48
Inventor 周祖昊秦泽宁向东刘佳嘉严子奇牛存稳贾仰文王浩
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES