Global analysis of sensitivity of bioretention cell design elements to hydrologic performance

查看全文 作　　者：Yan-wei [1]SUN;Xiao-mei [1]WEI;Christine A. [2]POMEROY

机构地区：[1]College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling 712100, P. R. China;[2]Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, UT 84112, USA

出　　处：《Water Science and Engineering》索引2011年第4卷第3期,共12页

摘　　要：Analysis of sensitivity of bioretention cell design elements to their hydrologic performances is meaningful in offering theoretical guidelines for proper design. Hydrologic performance of bioretention cells was facilitated with consideration of four metrics: the overflow ratio, groundwater recharge ratio, ponding time, and runoff coefficients. The storm water management model (SWMM) and the bioretention infiltration model RECARGA were applied to generating runoff and outflow time series for calculation of hydrologic performance metrics. Using a parking lot to build a bioretention cell, as an example, the Morris method was used to conduct global sensitivity analysis for two groups of bioretention samples, one without underdrain and the other with underdrain. Results show that the surface area is the most sensitive element to most of the hydrologic metrics, while the gravel depth is the least sensitive element whether bioretention cells are installed with underdrain or not. The saturated infiltration rate of planting soil and the saturated infiltration rate of native soil are the other two most sensitive elements for bioretention cells without underdrain, while the saturated infiltration rate of native soil and underdrain size are the two most sensitive design elements for bioretention cells with underdrain. 关键词：设计元素性能指标单元设计灵敏度分析滞留生物水文敏感性分析

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Global analysis of sensitivity of bioretention cell design elements to hydrologic performance

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