同济大学学报（自然科学版）2011，Vol.39Issue(10)：1506-1509,1527,5.DOI:10.3969/j.issn.0253-374x.2011.10.017
流量折减系数对雨水系统设计标准的影响
Impact of Attenuation Coefficient on Urban Storm Sewer System Desining
摘要
Abstract
Based on the Code for Design of Outdoor Wastewater Engineering, calculating storm sewer design flow (Q) with an attenuation coefficient (m) leads to a lower design flow than that of projects abroad, and reduces the capacity for disaster resistance of urban storm sewer system for the same design standard. This manuscript focuses on discussing the impacts of flow attenuation coefficient (m) on storm sewer system design. Based on appropriate assumptions, the mathematical expressions of the relationship between return periods with m = 1 and m = 2 were deduced, which lays the theoretical foundation for the analysis of the relationship among return periods. According to several examples, it is confirmed that the design flow rates defined bym = 1, design return period at one year (P = 1) and with same time intervals,could reach the same level as in the case with P = 1. 531 ~ 4. 028 years when m = 2 is taken. Reversely,when m = 2 and P = 1 year, the design flows are approximately equivalent to the values in situations with m = 1 and P = 0. 69 ~0. 393 years. In conclusion, the research suggests that the use of an attenuation coefficient would result in substantial reduction in storm sewer system design criteria and consequently increase the risk of waterlogging in urban regions in China.关键词
雨水系统/设计标准/折减系数/重现期Key words
storm sewer system/ design standard/ attenuation coefficient/ return period分类
建筑与水利引用本文复制引用
周玉文,翁窈瑶,汪明明..流量折减系数对雨水系统设计标准的影响[J].同济大学学报（自然科学版）,2011,39(10):1506-1509,1527,5.基金项目
国家自然科学基金(50678009) （50678009）
“十一五”国家科技支撑计划(2006BAJ16B04) （2006BAJ16B04）
欧盟第七框架国际合作项目-CORFU资助项目 （）
