Predicting the temporal transferability of model parameters through a hydrological signature analysis

查看全文 作　　者：Dilhani Ishanka [1]JAYATHILAKE;Tyler [1,2]SMITH 机构地区：[1]Institute for a Sustainable Environment,Clarkson University,Potsdam,NY 13699,USA;[2]Department of Civil and Environmental Engineering,Clarkson University,Potsdam,NY 13699,USA 出　　处：《Frontiers of Earth Science》索引2020年第14卷第1期,共14页 基　　金：We acknowledge the National Oceanic and Atmospheric Administration for making available the Model Parameter Estimation Experiment(MOPEX)data that was used for this study and S.Razavi for providing free access to the VARS toolbox.We thank the two anonymous reviewers for their contributions toward the improvement of this manuscript.Funding for this research was provided through a graduate scholarship from Clarkson University awarded to D.Jayathilake. 摘　　要：Attention has recently increased on the use of hydrological signatures as a potential tool for assessing the fidelity of model structures and providing insights into the transfer of model parameters.The utility of hydrological signatures as model performance/reliability indicators in a calibration-validation testing scenario(i.e.,the temporal transfer of model parameters)is the focus of this study.The Probability Distributed Model,a flexible conceptual hydrological model,is used to test the approach across a number of catchments included in the MOPEX data set We explore the change in model performance across calibration and validation time periods and contrast it to the corresponding change in several hydrological signatures to assess signature worth.Results are explored in finer detail by utilizing a moving window approach to calibration and validation time periods.The results of this study indicated that the most informative signature can vary,both spatially and temporally,based on physical and climatic characteristics and their interaction to the model parameterization.Thus,one signature could not adequately illustrate complex watershed behaviors nor predict model performance in new analysis periods. 关 键 词：streamflow HYDROLOGICAL SIGNATURE VALIDATION testing model CALIBRATION