Distributed hydrological model parallel operation method

Abstract

The invention provides a distributed hydrological model parallel operation method. The method includes the steps that the initial state of a circulation time period is determined, the initial state mainly includes the number of upstream dependency sub-streams and the cumulative sum of simulation time needed by all the sub-streams on circuits from all the sub-streams to steam outlets; stream segments with the longest cumulative operation time and without upstream dependency steam segments are selected, a node sub-course is established, and parallel simulation is conducted; parallel simulation is conducted on the sub-course through nodes, confluence operation simulation of the whole sub-streams is completed, and when confluence operation simulation is over, one is subtracted from the number of the upstream dependency sub-streams of direct downstream sub-streams of the whole sub-streams; the dynamic distribution process and the node simulation process are executed in a circulation mode until all the sub-streams are simulated, and simulation is conducted in a next circulation time period. According to the distributed hydrological model parallel operation method, the parallel efficiency of a hydrological model is improved, and the sub-stream consuming the longest time can be simulated in priority.

Description

technical field [0001] The invention belongs to the field of hydrological models, in particular to a parallel computing method for distributed hydrological models. Background technique [0002] With the increase of the application scale of the distributed hydrological model, the number of basic computing units is increasing, and the running time required for model operation is also increasing. Multi-threaded parallel computing has become an important method to improve the speed of model computing. In terms of model parallel computing, many scholars have conducted research and proposed different parallel computing methods, involving static / dynamic parallel task allocation schemes, time / space parallel allocation schemes, etc. The existing parallel computing methods assume that each sub-basin has basically the same running time, and the optimization efficiency for different sub-basins with different running times is not high. When encountering the problem of variable time step...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a parallel computing method for distributed hydrological models, aiming at solving the problem that the existing parallel computing dynamic allocation technology can only handle all sub-basins in a single simulation cycle of the same model and the same sub-basin in different simulation cycles. Cases with the same simulation operation time

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