《供水研究与技术》杂志刊登“综合城市污水模型在河流水质频率分析的应用”

作者：Guangtao Fu and David Butler

刊物：Journal of Water Supply: Research and Technology，2012年，65卷第12期，2112-2117页

关键词：合流下水道溢流；频率分析；综合模型；城市排水系统；水质

摘要：近年来，综合模型被用来模拟整个城市污水系统，包括城市排水系统、污水处理厂和纳污水体。本文用综合城市污水模型分析城市污水系统中纳污水体水质的频率，以此来评估降雨时整个系统的运行情况。纳污水体水质用两个指标来表征：场次平均溶氧浓度和场次平均铵浓度。用10年降雨系列中的降雨资料来推断水质指标能否满足特定的阈值，从而表征系统运行状态的好坏。在所研究的流域，每场降雨的降雨深与相应的合流下水道溢流流量（combined sewer overflow (CSO)）有很强的相关性；同时，降雨强度和降雨历时与合流下水道溢流流量（combined sewer overflow (CSO)）的相关性较弱。频率分析的结果表明，场次平均溶氧浓度和铵浓度在合流下水道溢流以及污水处理厂废水两个排放点的达到阈值的概率有非常不同的特征。总之，模拟的结果展示综合城市污水模型的运行情况，也能对水质管理提供有用信息支撑。

Frequency analysis of river water quality using integrated urban wastewater models

Authors : Guangtao Fu and David Butler

Journal: Journal of Water Supply: Research and Technology，2012.65(12)，2112-2117

keywords: combined sewer overflow；frequency analysis；integrated modelling；urban drainage system；water quality

Abstract: In recent years integrated models have been developed to simulate the entire urban wastewater system, including urban drainage systems, wastewater treatment plants, and receiving waterbodies. This paper uses such an integrated urban wastewater model to analyze the frequency of receiving water quality in an urban wastewater system with the aim of assessing the overall system performance during rainfall events. The receiving water quality is represented by two indicators: event mean dissolved oxygen (DO) concentration and event mean ammonium concentration. The compliance probability of the water quality indicators satisfying a specific threshold is used to represent the system performance, and is derived using the rainfall events from a series of 10 years’ rainfall data. A strong correlation between the depth of each rainfall event and the associated volume of combined sewer overflow (CSO) discharges is revealed for the case study catchment, while there is a low correlation between the intensity/duration of the rainfall event and the volume of the CSO discharges. The frequency analysis results obtained suggest that the event mean DO and ammonium concentrations have very different characteristics in terms of compliance probabilities at two discharging points for CSO and wastewater treatment plant effluent, respectively. In general, the simulation results provide an understanding of the performance of the integrated urban wastewater system and can provide useful information to support water quality management.

原文链接: http://www.iwaponline.com/wst/06512/wst065122112.htm