North Sea Region countries depend heavily on flood protection infrastructure, such as dikes, dams... more North Sea Region countries depend heavily on flood protection infrastructure, such as dikes, dams, sluices and flood gates. Knowledge on where, when and how much to invest to ensure functioning is of crucial importance for asset owners and operators. This requires asset management approaches that are adaptable, respond to feedback and function within various contexts. The FAIR (Flood defense infrastructure Asset management & Investment in Renovation, adaptation, optimisation and maintenance) project has developed a unique framework to ensure that asset management processes are adaptive, comprehensive and make effective connections across strategic, tactical and operational contexts. The framework has for the first time informed an assessment of maturity of five flood protection asset management organisations in the North Sea Region, using a seven-factor maturity assessment model. This paper describes the self-assessment process and the self-reported maturity changes during the proje...
The acoustic attenuation, relative sound pressure levels and the equivalent Nikuradse wall roughn... more The acoustic attenuation, relative sound pressure levels and the equivalent Nikuradse wall roughness under variable flow conditions in a 600 mm concrete sewer pipe are experimentally investigated. The values of the acoustic attenuation are obtained in the case of airborne sound propagation in the dry pipe. A range of values of the equivalent wall roughness is artificially generated by deploying a periodical array of engineering bricks. A novel method of rapid evaluation of the acoustic attenuation is proposed. The method relies upon sound reflections from the adjacent manholes. The results demonstrate that the acoustic attenuation depends strongly on the value of the equivalent wall roughness. This work can pave the way to the efficient methodology for the in-situ, physical evaluation of the equivalent hydraulic roughness of new and existing sewer networks.
Large existing sewers are considerable assets which wastewater utilities will require to operate ... more Large existing sewers are considerable assets which wastewater utilities will require to operate for the foreseeable future to maintain health and the quality of life in cities. Despite their existence for more than a century there is surprisingly little guidance available to manage these systems to minimise problems associated with in-sewer solids. A joint study has been undertaken in the UK, to refine and utilise new knowledge gained from field data, laboratory results and Computational Fluid Dynamics (CFD) simulations to devise cost beneficial engineering tools for the application of small invert traps to localise the deposition of sediments in sewers at accessible points for collection. New guidance has been produced for trap siting and this has been linked to a risk-cost-effectiveness assessment procedure to enable system operators to approach in-sewer sediment management pro-actively rather than reactively as currently happens.
Proceedings of the Institution of Civil Engineers - Engineering Sustainability, 2019
Resilience towards climate and socio-economic changes can be increased by means of flexible adapt... more Resilience towards climate and socio-economic changes can be increased by means of flexible adaptation. In contemporary adaptation planning, building resilience is considered together with objectives such as sustainability, productivity and transformations. An adaptation planning process (termed water-sensitive city adaptation planning process (WSCapp)) may be used to incorporate flexibility or incremental flexible adaptation measures in a comprehensive adaptation strategy, such as when planning water-sensitive cities. This paper applies WSCapp in the context of adapting to urban flooding in Melbourne, Australia, which aspires to become a water-sensitive city. Application of WSCapp – through nine steps of analysis – has helped identify appropriate adaptation measures and economic adaptation pathways. In the case of Melbourne, of the three adaptation measures considered, the combination of rainwater tanks at the household level and the flood-proofing of households was found to be the...
A project funded by UKWIR is under way in the UK to develop a relatively simple methodology where... more A project funded by UKWIR is under way in the UK to develop a relatively simple methodology whereby the effects of the introduction of extended in-sewer storage at CSOs on downstream sewerage and treatment can be assessed. Recent legislation (UK and European) has compelled many sewer system operators to introduce systems which increase in-sewer retention times, and also retain more flow and load within sewer networks. The project has reviewed existing knowledge about the interaction between in-sewer flow and treatment plants, together with available models. The study is utilising a “benchmark” of 3 configurations of treatment plant and dynamic simulation using the WRc STOAT software, with minor modifications to ensure that effects on odour generation and nutrient removal processes are adequately modelled. As no existing sewer flow quality model can represent the range of conditions possible in sewer networks, a combined application of the Hydroworks model and a new model developed a...
Proceedings of the Institution of Civil Engineers - Water Management, 2017
Sustainable drainage systems (SuDS) can bring a wide range of benefits in addition to reductions ... more Sustainable drainage systems (SuDS) can bring a wide range of benefits in addition to reductions in flood risk. However, there is limited quantified evidence of the value of these benefits. To help address this, the Construction Industry Research and Information Association led a project to develop the Benefits of SuDS Tool (Best). The approach presented in this paper shows how scenario planning can be used in Best to evaluate longer term benefits in the face of future uncertainty. Three case studies are presented, showing how this can inform robust decisions and the selection of SuDS options for maximum value.
North Sea Region countries depend heavily on flood protection infrastructure, such as dikes, dams... more North Sea Region countries depend heavily on flood protection infrastructure, such as dikes, dams, sluices and flood gates. Knowledge on where, when and how much to invest to ensure functioning is of crucial importance for asset owners and operators. This requires asset management approaches that are adaptable, respond to feedback and function within various contexts. The FAIR (Flood defense infrastructure Asset management & Investment in Renovation, adaptation, optimisation and maintenance) project has developed a unique framework to ensure that asset management processes are adaptive, comprehensive and make effective connections across strategic, tactical and operational contexts. The framework has for the first time informed an assessment of maturity of five flood protection asset management organisations in the North Sea Region, using a seven-factor maturity assessment model. This paper describes the self-assessment process and the self-reported maturity changes during the proje...
The acoustic attenuation, relative sound pressure levels and the equivalent Nikuradse wall roughn... more The acoustic attenuation, relative sound pressure levels and the equivalent Nikuradse wall roughness under variable flow conditions in a 600 mm concrete sewer pipe are experimentally investigated. The values of the acoustic attenuation are obtained in the case of airborne sound propagation in the dry pipe. A range of values of the equivalent wall roughness is artificially generated by deploying a periodical array of engineering bricks. A novel method of rapid evaluation of the acoustic attenuation is proposed. The method relies upon sound reflections from the adjacent manholes. The results demonstrate that the acoustic attenuation depends strongly on the value of the equivalent wall roughness. This work can pave the way to the efficient methodology for the in-situ, physical evaluation of the equivalent hydraulic roughness of new and existing sewer networks.
Large existing sewers are considerable assets which wastewater utilities will require to operate ... more Large existing sewers are considerable assets which wastewater utilities will require to operate for the foreseeable future to maintain health and the quality of life in cities. Despite their existence for more than a century there is surprisingly little guidance available to manage these systems to minimise problems associated with in-sewer solids. A joint study has been undertaken in the UK, to refine and utilise new knowledge gained from field data, laboratory results and Computational Fluid Dynamics (CFD) simulations to devise cost beneficial engineering tools for the application of small invert traps to localise the deposition of sediments in sewers at accessible points for collection. New guidance has been produced for trap siting and this has been linked to a risk-cost-effectiveness assessment procedure to enable system operators to approach in-sewer sediment management pro-actively rather than reactively as currently happens.
Proceedings of the Institution of Civil Engineers - Engineering Sustainability, 2019
Resilience towards climate and socio-economic changes can be increased by means of flexible adapt... more Resilience towards climate and socio-economic changes can be increased by means of flexible adaptation. In contemporary adaptation planning, building resilience is considered together with objectives such as sustainability, productivity and transformations. An adaptation planning process (termed water-sensitive city adaptation planning process (WSCapp)) may be used to incorporate flexibility or incremental flexible adaptation measures in a comprehensive adaptation strategy, such as when planning water-sensitive cities. This paper applies WSCapp in the context of adapting to urban flooding in Melbourne, Australia, which aspires to become a water-sensitive city. Application of WSCapp – through nine steps of analysis – has helped identify appropriate adaptation measures and economic adaptation pathways. In the case of Melbourne, of the three adaptation measures considered, the combination of rainwater tanks at the household level and the flood-proofing of households was found to be the...
A project funded by UKWIR is under way in the UK to develop a relatively simple methodology where... more A project funded by UKWIR is under way in the UK to develop a relatively simple methodology whereby the effects of the introduction of extended in-sewer storage at CSOs on downstream sewerage and treatment can be assessed. Recent legislation (UK and European) has compelled many sewer system operators to introduce systems which increase in-sewer retention times, and also retain more flow and load within sewer networks. The project has reviewed existing knowledge about the interaction between in-sewer flow and treatment plants, together with available models. The study is utilising a “benchmark” of 3 configurations of treatment plant and dynamic simulation using the WRc STOAT software, with minor modifications to ensure that effects on odour generation and nutrient removal processes are adequately modelled. As no existing sewer flow quality model can represent the range of conditions possible in sewer networks, a combined application of the Hydroworks model and a new model developed a...
Proceedings of the Institution of Civil Engineers - Water Management, 2017
Sustainable drainage systems (SuDS) can bring a wide range of benefits in addition to reductions ... more Sustainable drainage systems (SuDS) can bring a wide range of benefits in addition to reductions in flood risk. However, there is limited quantified evidence of the value of these benefits. To help address this, the Construction Industry Research and Information Association led a project to develop the Benefits of SuDS Tool (Best). The approach presented in this paper shows how scenario planning can be used in Best to evaluate longer term benefits in the face of future uncertainty. Three case studies are presented, showing how this can inform robust decisions and the selection of SuDS options for maximum value.
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