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Distributed scheduling system and method for gpu watershed runoff simulation

A scheduling method and distributed technology, applied in resource allocation, multi-program device, program control design, etc., can solve the problems of reducing the efficiency of runoff simulation, reduce the amount of data exchange data, improve efficiency, and solve the problem of huge amount of calculation Effect

Active Publication Date: 2021-10-15
CHENGDU UNIV OF INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the iterative calculation of large-scale and high-precision watershed runoff confluence, this method will lead to frequent exchange of a large amount of data between video memory and internal memory, which reduces the efficiency of runoff simulation

Method used

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  • Distributed scheduling system and method for gpu watershed runoff simulation
  • Distributed scheduling system and method for gpu watershed runoff simulation
  • Distributed scheduling system and method for gpu watershed runoff simulation

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Embodiment 1

[0058] In a specific embodiment, the overall thinking adopted by the present invention is as follows: In order to improve the simulation accuracy of runoff and confluence, the present invention adopts a distributed hydrological model. First, the watershed is divided into grid sets with equal area and size according to a certain spatial resolution; on this basis, the process of runoff confluence is divided into time slices with equal time intervals. For each time slice, the grid is used as the unit for confluence calculation. Through the iteration of time slices, the process simulation of runoff and confluence in the watershed is completed. Considering the large amount of computation of the distributed hydrological model and the low performance of the CPU, a general-purpose computation is introduced to improve the computation efficiency.

[0059] In order to solve the problem of frequent video memory and memory data exchange when a single computer simulates the runoff confluen...

Embodiment approach

[0101] In order to improve the simulation accuracy of runoff and confluence, a distributed hydrological model is adopted. First, the watershed is divided into grid sets with equal area and size according to a certain spatial resolution; on this basis, the process of runoff confluence is divided into time slices with equal time intervals. For each time slice, the grid is used as the unit for confluence calculation. Through the iteration of time slices, the process simulation of runoff and confluence in the watershed is completed.

[0102] Considering the large amount of computation of the distributed hydrological model and the low performance of the CPU, a general-purpose computation is introduced to improve the computation efficiency. The runoff and inflow simulation supported by general computing requires that the runoff and inflow results of each grid unit have no influence on other grid units in a time slice, that is, the runoff and inflow calculation of the grid units can...

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Abstract

The present invention provides a GPU watershed runoff simulation distributed scheduling method and system, the method comprising: dividing the watershed data into several sub-blocks, and dividing the runoff confluence calculation process into time slices with equal time intervals; dividing the several sub-blocks The blocks are sent to different computers on the server for general calculation; after receiving a sub-block processing task, the different computers on the server are always responsible for iterative processing of the runoff simulation of the sub-block; in the iterative processing, the sub-block After each iteration, edge data is exchanged with neighboring subblocks. The technical solution of the invention well solves the contradiction between the huge amount of calculation and the CPU performance bottleneck of the traditional model, breaks through the bottleneck of frequent exchange of a large amount of data between video memory and internal memory in GPU block calculation, and improves the efficiency of runoff confluence simulation.

Description

technical field [0001] The invention relates to the field of data simulation processing of runoff in river basins, in particular to a simulation distributed dispatching method and dispatching system of runoff in a river basin supported by general computing. Background technique [0002] my country is one of the countries with the most frequent and severe flood disasters in the world, so the rapid simulation and assessment of rainstorm and flood disasters is of great significance. The hydrological model is the basis of storm risk simulation. Many mature hydrological models have been proposed at home and abroad, including lumped hydrological models such as water tank model, SWMM and PRMS, and semi-distributed or distributed models such as TOPMODEL, SHE and SWAT. . The distributed hydrological model introduces hydrodynamics into the actual confluence simulation, and can study the runoff confluence at the outlet of the watershed or at various points in the watershed. Therefore,...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/48G06F9/50
CPCG06F9/4881G06F9/5066
Inventor 陈军文军
Owner CHENGDU UNIV OF INFORMATION TECH