Department of Civil Engineering and Mechanics, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, USA.
Environ Manage. 2011 Feb;47(2):201-17. doi: 10.1007/s00267-010-9591-2. Epub 2010 Dec 12.
Runoff coefficients are usually considered in isolation for each drainage area with resulting large uncertainties in the areas and coefficients. Accurate areas and coefficients are obtained here by optimizing runoff coefficients for characteristic Geographic Information Systems (GIS) subareas within each drainage area so that the resulting runoff coefficients of each drainage area are consistent with those obtained from runoff and rainfall volumes. Lack of fit can indicate that the ArcGIS information is inaccurate or more likely, that the drainage area needs adjustment. Results for 18 drainage areas in Milwaukee, WI for 2000-2004 indicate runoff coefficients ranging from 0.123 for a mostly residential area to 0.679 for a freeway-related land, with a standard error of 0.047. Optimized runoff coefficients are necessary input parameters for monitoring, and for the analysis and design of in situ stormwater unit operations and processes for the control of both urban runoff quantity and quality.
径流量系数通常被单独考虑用于每个排水区域，这导致区域和系数存在较大的不确定性。通过对每个排水区域内的特征地理信息系统 (GIS) 子区域的径流量系数进行优化，从而获得准确的区域和系数，使得每个排水区域的径流量系数与从径流量和降雨量获得的结果一致。不匹配可能表明 ArcGIS 信息不准确，或者更有可能是排水区域需要调整。对威斯康星州密尔沃基的 18 个排水区域在 2000-2004 年的研究结果表明，径流量系数范围从主要为住宅区的 0.123 到与高速公路相关的土地的 0.679，标准误差为 0.047。优化后的径流量系数是监测以及原位雨水单元操作和过程分析与设计的必要输入参数，用于控制城市径流量的数量和质量。
