A parameter calibration method and device suitable for large-scale hydrological simulation

Abstract

The invention provides a parameter calibration method and device suitable for large-scale hydrological simulation, and the method and device can improve the optimization speed. The method comprises the steps that according to the upstream and downstream confluence relation between sub-basins and whether observation result data exist in the sub-basins or not, a to-be-studied basin is divided into blocks, a block area relation graph of the to-be-studied basin is obtained, and each block contains and only contains one sub-basin with the observation result data; According to the inter-block dependency relationship in the block region relationship graph, the block region relationship is calculated; The upstream block and the downstream block are arranged in order. Based on a parallel computingtechnology, multi-stage parallel parameter calibration is carried out by taking a block as a unit, parameter calibration tasks of a plurality of blocks without upstream and downstream dependency relationships are distributed to a plurality of processor cores in parallel for execution in an outer-layer parallel manner, and the parameter calibration tasks of a single block are subjected to task decomposition in an inner-layer parallel manner and then are executed in parallel by using the plurality of processor cores. The invention relates to the field of hydrological simulation.

Description

technical field [0001] The invention relates to the field of hydrological simulation, in particular to a parameter calibration method and calibration device suitable for large-scale hydrological simulation. Background technique [0002] Hydrological simulation, as the pillar of water resource development and utilization, flood control and disaster reduction, reservoir management, road construction, urban planning, point source pollution assessment, basin response to human activities, etc., is closely related to human survival. However, parameter calibration is an important link that directly affects the accuracy of hydrological simulation results. How to improve its calibration speed and accuracy under the background of large spatial scale, long time scale, fine grid division, and high-dimensional parameter hydrological simulation has always been a hydrological Hot issues in the field of research. The goal of parameter calibration is to find an "optimal" model parameter set...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a parameter calibration method and calibration device suitable for large-scale hydrological simulation, so as to solve the parameter calibration problem of "calibrating a sub-basin from top to bottom" existing in the prior art. The problem of dependence on the observation data of each sub-basin in the strategy and the slow speed of serial execution parameter calibration

Images