{"title":"Assessment of the Sensitivity of Streamflow Simulations to Changes in Patch Resolution Using GIS Based Hydro-Ecologic Model","authors":"S. Mengistu, Melkamu Ali, Fuad Yassin","doi":"10.4236/OJMH.2016.62007","DOIUrl":null,"url":null,"abstract":"Eight different patch configurations were investigated to analyze the effect of patch characterization/formation in streamflow simulation, using the Regional Hydro-Ecologic Simulation Systems (RHESSys) model. It is investigated for eight different patch configurations of a subcatchment of the Turkey Lakes Watershed, Ontario. The model’s hydrological parameters are calibrated for each of these patch configurations and the performance of the simulations is evaluated. Results indicate that both the nature of the flow simulation and the calibrated parameter values are sensitive to patch configuration. The best simulation results were obtained for the patch configuration with the highest spatial variation of climate, stream network and hillslope conditions across the subcatchment. Different patch configurations also lead to markedly different calibrations of the model’s hydrological parameters (54.26 < k < 119.13; and 1.02 < m < 2.28), which has implications for the physical interpretation and transferability of the calibrated parameter values.","PeriodicalId":70695,"journal":{"name":"现代水文学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2016-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"现代水文学期刊(英文)","FirstCategoryId":"1089","ListUrlMain":"https://doi.org/10.4236/OJMH.2016.62007","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3
Abstract
Eight different patch configurations were investigated to analyze the effect of patch characterization/formation in streamflow simulation, using the Regional Hydro-Ecologic Simulation Systems (RHESSys) model. It is investigated for eight different patch configurations of a subcatchment of the Turkey Lakes Watershed, Ontario. The model’s hydrological parameters are calibrated for each of these patch configurations and the performance of the simulations is evaluated. Results indicate that both the nature of the flow simulation and the calibrated parameter values are sensitive to patch configuration. The best simulation results were obtained for the patch configuration with the highest spatial variation of climate, stream network and hillslope conditions across the subcatchment. Different patch configurations also lead to markedly different calibrations of the model’s hydrological parameters (54.26 < k < 119.13; and 1.02 < m < 2.28), which has implications for the physical interpretation and transferability of the calibrated parameter values.
利用区域水文生态模拟系统(RHESSys)模型,研究了8种不同的斑块构型,分析了斑块表征/形成对河流模拟的影响。它是调查了土耳其湖流域,安大略省的一个子集水区的八个不同的补丁配置。模型的水文参数针对每一种斑块配置进行了校准,并评估了模拟的性能。结果表明,流动模拟的性质和标定的参数值都对贴片结构敏感。气候、水系和坡面条件空间变化最大的斑块构型模拟结果最好。不同的斑块配置也导致模型水文参数的标定差异显著(54.26 < k < 119.13;和1.02 < m < 2.28),这对校准参数值的物理解释和可转移性有影响。