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不同目标函数对水文工程中心降雨径流模型的精度影响分析

发表时间:2011-11-15  浏览量:1119  下载量:384
全部作者: 韩继伟,孔凡哲,宋晓猛,赵磊
作者单位: 中国矿业大学资源与地球科学学院
摘 要: 以水文工程中心降雨径流模型(hydrologic engineering center hydrologic modeling system,HEC-HMS)为例,采用HEC-HMS参数自动优化模型,选定5种不同目标函数[洪峰权重的均方根误差(peak-weighted root mean square error, PRMSE)、残差平方和(sum of squared residuals, SSR)、绝对残差和(sum of absolute residuals, SAR)、洪峰误差百分比(percent error in peak flow, PEPF)和洪量误差百分比(percent error in volume, PEV)]进行模型参数优化并比较模型模拟结果。由结果分析可知:洪峰权重的均方根误差、残差平方和,以及绝对残差和对整体影响显著,洪峰误差百分比和洪量误差百分比分别对洪峰误差和洪量误差影响显著。综合比较各目标函数优化的模拟结果可知:以残差平方和为目标函数优化参数得到的模拟效果最佳。
关 键 词: 水文学;水文工程中心降雨径流模型;目标函数;参数优化;拟合精度
Title: Effects of different objective functions on the performance of HEC-HMS model
Author: HAN Jiwei, KONG Fanzhe, SONG Xiaomeng, ZHAO Lei
Organization: School of Resource and Earth Science, China University of Mining and Technology
Abstract: Taking the hydrologic engineering center hydrologic modeling system (HEC-HMS) as an example, this paper used the parameter optimization model in the HEC-HMS model and chose five objective functions, such as peak-weighted root mean square error (PRMSE), sum of squared residuals (SSR), sum of absolute residuals (SAR), percent error in peak flow (PEPF) and percent error in volume (PEV), to calibrate and simulate the hydrological processes. The results showed that the objective functions based on the PRMSE, SSR and SAR had a highlighted effect on the entire hydrological processes while the PEPF and PEV put more emphasis on the error of peak flow and volume respectively. And also the simulation results based on the objective function of SSR are best goodness-of-fit for all the events.
Key words: hydrology; hydrologic engineering center hydrologic modeling system; objective function; parameter optimization; goodness-of-fit
发表期数: 2011年11月第21期
引用格式: 韩继伟,孔凡哲,宋晓猛,等. 不同目标函数对水文工程中心降雨径流模型的精度影响分析[J]. 中国科技论文在线精品论文,2011,4(21):1994-1999.
 
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