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应用生态学报 ›› 2016, Vol. 27 ›› Issue (11): 3659-3666.doi: 10.13287/j.1001-9332.201611.030

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基于SWMM模型的城市排水区域降雨及地表产流特征

熊丽君1,2, 黄飞1, 徐祖信1*, 李怀正1, 龚玲玲3, 董梦珂1   

  1. 1同济大学长江水环境教育部重点实验室, 上海 200092;
    2上海市环境科学研究院, 上海 200233;
    3上海世博城市最佳实践区商务有限公司, 上海 200011
  • 收稿日期:2016-04-29 出版日期:2016-11-18 发布日期:2016-11-18
  • 通讯作者: E-mail: xzx@stcsm.gov.cn
  • 作者简介:熊丽君,女,1977年生,高级工程师,博士研究生.主要从事面源污染模拟、低影响开发、生态环境规划等研究.E-mail: xionglj@saes.sh.cn
  • 基金资助:
    本文由国家水体污染控制与治理科技重大专项(2013ZX07304-002)和上海市科委科研项目(13210701001,13231201402)资助

Characteristics of rainfall and runoff in urban drainage based on the SWMM model.

XIONG Li-jun1,2, HUANG Fei1, XU Zu-xin1*, LI Huai-zheng1, GONG Ling-ling3, DONG Meng-ke1   

  1. 1Ministry of Education Key Laboratory of Yangze River Water Enviornment, Tongji University, Shanghai 200092, China;
    2Shanghai Academy of Environmental Sciences, Shanghai 200233, China;
    3World Expo Urban Best Practice Area Business Co., Ltd, Shanghai 200011, China
  • Received:2016-04-29 Online:2016-11-18 Published:2016-11-18
  • Contact: E-mail: xzx@stcsm.gov.cn
  • Supported by:
    This work was supported by China’s Major Science and Technology Project on Water Pollution Control and Treatment (2013ZX07304-002) and the Shanghai Department of Science (13210701001, 13231201402).

摘要: 以上海市中心城区典型排水区域为研究对象,基于SWMM模型连续模拟2009—2011年降雨径流,分析区域235场降雨及地表径流特征.结果表明: 该区域发生频率较高的降雨具有雨量小、强度低的特点,雨量为0~10 mm、平均降雨强度为0~5 mm·h-1、降雨峰值为0~10 mm·h-1的降雨发生频率最大,分别占所有研究降雨场次的66.4%、88.8%和79.6%,这对于该区域应用低影响开发措施削减小雨量或低强度降雨下的径流和面源污染具有重要意义;径流量总体随着降雨量增大而增大,区域降雨产流临界值不仅与降雨量有关,还与平均降雨强度和降雨历时有关,2 mm以下的降雨基本不产流;2~4 mm的降雨如降雨强度在1.6 mm·h-1以下,产流量不到1 mm,当降雨量在4 mm以上、平均降雨强度大于1.6 mm·h-1时,区域基本产流.基于SWMM径流模拟结果,建立适合该区域的径流量与降雨因子的回归方程,其调整R2均大于0.97,能较好反映该区域径流量与降雨因子的关系.研究结果可为该区域更好地规划低影响开发措施和削减排水系统溢流污染提供计算基础,并为类似区域的径流研究提供参考.

关键词: 降雨, 回归分析, 径流, SWMM, 低影响开发

Abstract: The characteristics of 235 rainfall and surface runoff events, from 2009 to 2011 in a typical urban drainage area in Shanghai were analyzed by using SWMM model. The results showed that the rainfall events in the region with high occurrence frequency were characterized by small rainfall amount and low intensity. The most probably occurred rainfall had total amount less than 10 mm, or mean intensity less than 5 mm·h-1,or peak intensity less than 10 mm·h-1, accounting for 66.4%, 88.8% and 79.6% of the total rainfall events, respectively. The study was of great significance to apply low-impact development to reduce runoff and non-point source pollution under condition of less rainfall amount or low mean rainfall intensity in the area. The runoff generally increased with the increase of rainfall. The threshold of regional occurring runoff was controlled by not only rainfall amount, but also mean rainfall intensity and rainfall duration. In general, there was no surface runoff when the rainfall amount was less than 2 mm. When the rainfall amount was between 2 to 4 mm and the mean rainfall intensity was below 1.6 mm·h-1, the runoff was less than 1 mm. When the rainfall exceeded 4 mm and the mean rainfall intensity was larger than 1.6 mm·h-1, the runoff would occur generally. Based on the results of the SWMM simulation, three regression equations that were applicable to regional runoff amount and rainfall factors were established. The adjustment R2 of the three equations were greater than 0.97. This indicated that the equations could reflect well the relationship between runoff and rainfall variables. The results provided the basis of calculations to plan low impact development and better reduce overflow pollution in local drainage area. It also could serve as a useful reference for runoff study in similar drainage areas.

Key words: SWMM, runoff, rainfall, low impact development, regression analysis