基于均匀设计法的VIC模型参数率定
Calibration of parameters for VIC model based on uniform design method

【目的】用新方法对大尺度分布式水文模型VIC的参数进行率定，为水文模型参数率定提供新的思路。【方法】采用均匀设计理论对传统的率定区间进行重构，确定最优组合，并对渭河流域的林家村、张家山以及流域出口断面水文站的径流进行模拟调试。【结果】将基准期需要率定的6个参数转化成一个6因素10水平的组合，仅通过10次率定就使各站的Nash系数达到0.85以上，总量精度误差控制在5%以内，能够满足工程精度要求。【结论】与其他参数率定方法相比，均匀设计原理在保证模拟效果的同时可以极大地减少工作量。
【Objective】Calibration of parameters for large-scale distributed hydrological model VIC was conducted with a new method to provide new ideas for the calibration of hydrologic model parameters.【Method】The optimal combination was determined using uniform design theory to reconstruct traditional calibration intervals and runoffs at hydrological stations including Linjiacun,Zhangjiashan and the export section of Weihe River basin were simulated.【Result】The six parameters required by calibration in the baseline period were converted to a combination of six factors and 10 levels.Only 10 times of calibrations were needed to make the Nash coefficients of all stations reach >0.85 with the total accuracy error of <5%,meeting the engineering precision.【Conclusion】Uniform design principle greatly reduced the workload while ensuring the simulation results compared to other parameter adjustment methods