Kafi Mounira, Gasperi J, Moilleron R, Gromaire M C, Chebbo G
Laboratoire de Génie Urbain, Environnement et Habitat, Bâtiment Lavoisier, Université de Marne la Vallée, 5, Bd Descartes-Cité Descartes, 77454 Marne la Vallée Cedex 2, France.
Water Res. 2008 Feb;42(3):539-49. doi: 10.1016/j.watres.2007.08.008. Epub 2007 Aug 12.
An on-site observatory of urban pollutant loads in combined sewers has been created in Paris in order to investigate wet weather pollutant loads at different spatial scales. This observatory is composed of six urban catchments, covering areas from 41 to 2581ha. For a wide range of parameters including suspended solids (SS), volatile suspended solids (VSS), chemical oxygen demand (COD), biochemical oxygen demand (BOD5), total organic carbon (TOC), total Kjeldahl nitrogen (TKN), metals (Cd, Cu, Pb, Zn), aliphatic hydrocarbons and polycyclic aromatic hydrocarbons (AHs and PAHs), this article serves to evaluate the potential scale effect on wet weather flow (WWF) quality. Although the extensive data set compiled herein has emphasized the high variability in WWF quality from one rain event to the next, no scale effect could be observed for a given rain event on pollutant concentrations, distributions between dissolved and particulate phases, pollutant contents and loads. Such results are of prime importance since they suggest (i) no spatial scale influence on WWF quality for the considered catchments and (ii) similar dominant sources and transfer processes at the various spatial scales.
为了研究不同空间尺度下的雨天污染物负荷，巴黎建立了一个合流制下水道城市污染物负荷现场观测站。该观测站由六个城市集水区组成，覆盖面积从41公顷到2581公顷不等。对于包括悬浮固体（SS）、挥发性悬浮固体（VSS）、化学需氧量（COD）、生化需氧量（BOD5）、总有机碳（TOC）、凯氏氮总量（TKN）、金属（镉、铜、铅、锌）、脂肪烃和多环芳烃（AHs和PAHs）在内的一系列参数，本文旨在评估对雨天径流（WWF）质量的潜在尺度效应。尽管本文汇编的大量数据集强调了不同降雨事件之间WWF质量的高度变异性，但对于给定降雨事件，在污染物浓度、溶解相和颗粒相之间的分布、污染物含量和负荷方面未观察到尺度效应。这些结果至关重要，因为它们表明：（i）对于所考虑的集水区，WWF质量不受空间尺度影响；（ii）在不同空间尺度上，主要来源和传输过程相似。
