Authors

D.S. Jarman, M.G. Faram, D. Butler, G. Tabor, V.R. Stovin, D. Burt and E. Throp

Abstract

Computational Fluid Dynamics (CFD) can be applied to gain insights into most fluid processes and associated phenomena and so presents potential to add value in the analysis of urban drainage systems. This paper presents a review of CFD studies carried out in this field, with the objective of developing an appreciation of how and where it can be applied. Existing work has tended to focus around the analysis of four types of urban drainage structure, including Combined Sewer Overflows (CSOs), storage and attenuation systems, stormwater sediment interceptors and sewerage conveyance structures. Within the respective studies, the prediction of flowfields, particulate behaviour, water surface profiles and Residence Time Distributions (RTDs) are found to form the main focus, and as such, these are considered in most detail in the paper. It is concluded that CFD presents a number of opportunities in urban drainage system analysis, and that the scope of this opportunity will further develop as both computational hardware and software resources become more advanced.

Authors

Robert Y.G. Andoh,Michael G. Faram and Kwabena Osei

Abstract

Globally, the water and wastewater industry faces major challenges, both in developed and developing world regions. The developed world has enjoyed the benefits of the foresight of prior generations, with major strides gained in public health simply from innovations such as the humble sewer which has contributed more to human health than all developments in the medical field. Challenges faced in different regions are diverse in nature, magnitude and scale. Some are local in nature but others such as the impacts of Climate Change are truly global. The paper examines the status and evolution of innovations within urban water management (with particular reference to stormwater management) including impacts of regulation, barriers to innovation, current trends and paradigms. It is argued that there is a need to change the way we approach urban water management challenges, particular if the goal is to achieve more sustainable development in an increasingly urbanizing world.

Author

A.G.Stephenson

The problems surrounding how we deal with stormwater run-off and issues such as drought, flooding and water pollution have been well publicised in recent years fuelled, to great extent, by the growing consciousness of climate change. The summer floods of 2007 throughout the UK also led to the publication of several reports such as Sir Michael Pitt’s Interim Review and the more recent Flooding report from the House of Commons Environment Food and Rural Affairs Committee. DEFRA have also published Future Water, the Government’s water strategy for England and all of these documents have heightened awareness of the benefits of sustainable drainage and the contribution that can be made to reduction of flood risk. There are many methods available and approaches in the SUDS ‘toolbox’ but all too often designers are restricted to ‘soft’ or natural options or what have become known as traditional SUDS, failing to consider some of the innovative proprietary solutions that have been used for many years which have provided very robust, cost effective and reliable answers. This paper will use an interesting case study to demonstrate how these systems have been used in conjunction with traditional SUDS options resulting in a complimentary, holistic solution helping create a whole sustainable community.

Authors

A.G. Stephenson, S. Boots

Abstract

The problems surrounding how we deal with stormwater run-off and issues such as drought, flooding and water pollution have been well publicised in recent years fuelled, to great extent, by the growing consciousness of climate change. This has lead to an increasing number of guidance documents and initiatives which help explain how we can adopt a sustainable and more holistic approach to stormwater management. There are many methods available and approaches in the SUDS ‘toolbox’ but all too often designers are restricted to ‘soft’ options or what have become known as traditional SUDS, failing to consider some of the innovative proprietary solutions that have been used for many years which have provided very robust, cost effective and reliable answers. This paper will use an interesting case study to demonstrate how these systems have been used in conjunction with traditional SUDS options resulting in a complimentary, holistic solution helping create a whole sustainable community.