Dresden University of Technology, Institute for Urban Water Management, 01062 Dresden, Germany.
Water Sci Technol. 2011;63(10):2294-9. doi: 10.2166/wst.2011.167.
Exfiltration of waste water from sewer systems represents a potential danger for the soil and the aquifer. Common models, which are used to describe the exfiltration process, are based on the law of Darcy, extended by a more or less detailed consideration of the expansion of leaks, the characteristics of the soil and the colmation layer. But, due to the complexity of the exfiltration process, the calibration of these models includes a significant uncertainty. In this paper, a new exfiltration approach is introduced, which implements the dynamics of the clogging process and the structural conditions near sewer leaks. The calibration is realised according to experimental studies and analysis of groundwater infiltration to sewers. Furthermore, exfiltration rates and the sensitivity of the approach are estimated and evaluated, respectively, by Monte-Carlo simulations.
污水从下水道系统中渗出会对土壤和含水层造成潜在的危害。常用的模型是基于达西定律建立的，这些模型通过更详细或更简略的方式来考虑泄漏的扩张、土壤特性和堵塞层等因素，以描述渗出过程。但是，由于渗出过程非常复杂，这些模型的校准存在很大的不确定性。本文提出了一种新的渗出方法，该方法考虑了堵塞过程的动态变化以及下水道泄漏附近的结构条件。通过实验研究和对地下水渗透到下水道的分析，对模型进行了校准。此外，还通过蒙特卡罗模拟分别对渗出率和方法的敏感性进行了估计和评估。
