Coupling urban event-based and catchment continuous modelling for combined sewer overflow river impact assessment

Author:

Andrés-Doménech I.,Múnera J. C.,Francés F.,Marco J. B.

Abstract

Abstract. Since Water Framework Directive (WFD) was passed in year 2000, the conservation of water bodies in the EU must be understood in a completely different way. Regarding to combined sewer overflows (CSOs) from urban drainage networks, the WFD implies that we cannot accept CSOs because of their intrinsic features, but they must be assessed for their impact on the receiving water bodies in agreement with specific environmental aims. Consequently, both, urban system and the receiving water body must be jointly analysed to evaluate the environmental impact generated on the latter. In this context, a coupled scheme is presented in this paper to assess the CSOs impact on a river system in Torrelavega (Spain). First, a urban model is developed to statistically characterise the CSOs frequency, volume and duration. The main feature of this first model is the fact of being event-based: the system is modelled with some built synthetic storms which cover adequately the probability range of the main rainfall descriptors, i.e., rainfall event volume and peak intensity. Thus, CSOs are characterised in terms of their occurrence probability. Secondly, a continuous and distributed basin model is built to assess river response at different points in the river network. This model was calibrated initially on a daily scale and downscaled later to hourly scale. The main objective of this second element of the scheme is to provide the most likely state of the receiving river when a CSO occurs. By combining results of both models, CSO and river flows are homogeneously characterised from a statistical point of view. Finally, results from both models were coupled to estimate the final concentration of some analysed pollutants (biochemical oxygen demand, BOD, and total ammonium, NH4+), within the river just after the spills.

Publisher

Copernicus GmbH

Subject

General Earth and Planetary Sciences,General Engineering,General Environmental Science

Reference31 articles.

1. Adams, B. J., Fraser, H. G., Howard, C. D. D., and Hanafy, M. S.: Meteorological data analysis for drainage system design, J. Environ. Eng.-ASCE, 112(5), 824–847, 1986.

2. Adams, B. J. and Papa, F.: Urban stormwater management planning with analytical probabilistic method, John Wiley & Sons, Inc, New York, USA, 358 pp., 2000.

3. Andrés-Doménech, I. and Marco Segura, J. B.: Multivariate rainfall distributions for stormwater detention tank sizing using probabilistic and single-event approaches, A comparison between northern and eastern Spain, Proceedings of the 11th International Conference on Urban Drainage, (CD-ROM), Edinburg, Scotland, UK, 2008.

4. Andrés-Doménech, I., Montanari, A., and Marco, J. B.: Stochastic rainfall analysis for storm tank performance evaluation, Hydrol. Earth Syst. Sci., 14, 1221–1232, https://doi.org/10.5194/hess-14-1221-2010, 2010.

5. Bachoc, A., Sanchez, Y., Le Guennec, B., Chebbo, G., Laplace, D., and Lin, H.: Bilan scientifique et technologique du programme de recherche sur les solides en réseaux d'assainissement, TSM-L'EAU, 10, 537–541, 1993.

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3