The

 

Knowledge

store

Climate Change 

Flow modelling of urban water distribution systems using water conservation fittings

Reference: 18/CL/12/3
ISBN: 1 84057 849 1
Published Date: 10/02/2018

The aim of this work was to assess the impact of water conserving fixtures and fittings on UK building drainage (wastewater collection) systems of up to 100mm diameter, ranging from the point where the appliance discharges into the collection drain to the connection to the common sewer.

This involved taking an inventory of water conserving devices currently available, and to quantify the effect that these could have on wastewater collection systems in terms of increased solids residence times and creation of downstream blockages caused by solid waste deposition or other flow problems.

Price: £50  

Rainfall Intensity for Sewer Design - Stage 2

Reference: 17/CL/10/17
ISBN: 1 84057 842 4
Published Date: 13/09/2017

This research and its data products make use of a new Met Office 1.5km climate length model simulation of the United Kingdom. This is important because the model can resolve convective processes that produce the heavy rain seen in all seasons which affects the functioning of urban drainage systems. The data products are optimised for use in the planning of urban drainage networks and the analysis of surface water flooding.

The two data products, aimed at urban drainage and storm water management professionals are: 

1.            Estimated changes in design storm uplifts, covering three different regions of the UK.

2.            A time series perturbation tool that allows rainfall time series to be adjusted to reflect estimated future rainfall conditions.

Estimated changes to design storms show similar or higher changes to those currently used by the water industry - this could have significant impacts on the resilience of sewer networks in the future, triggering different adaptive responses to protect customers and communities from flooding. The time series tool allows analysis of future changes to the operation of combined sewer overflows (CSOs) and wet weather loadings on treatment plants. 

Note: The software tool for this project can be downloaded from the 'Supporting Documents' CD.

Price: £250  

Demand Side Energy Management

Reference: 15/CL/11/7
ISBN: 1 84057 782 7
Published Date: 30/07/2015

Demand side responses to electricity supply are being incentivised by HM Government and the National Grid to manage restricted grid capacity. UKWIR investigated the potential for demand side energy management in the UK water industry and its challenges and constraints. The principal challenge to water companies in deploying demand side management is that diurnal peak demands for water and electricity coincide.

The UK Water sector needs to proactively pursue and systematically implement value recovery from power use to maximise benefits available. An estimate of benefits of demand management deployment based on interventions in water and wastewater tested in this study produced a sector benefit total of £84million per annum for England and Wales. This opportunity for TOTEX reduction for both water companies and the water sector will require a shift in priorities towards investment in improved flexibility, controllability and energy efficiency to optimise processes and plant.

Price: £300  

Planning for, and Responding to, the Mean and Extremes of Weather - Technical Report

Reference: 15/CL/01/23
ISBN: 1 84057 779 7
Published Date: 23/07/2015

This project sought to establish quantifiable links between extreme weather events and their impact on operations and assets in relation to service. Following a series of consultation exercises, literature review and voting, 15 perceived linkages between weather and performance were analysed.

Of the 15 linkages analysed, 13 demonstrated that the hypothesis of weather impacting performance was true, 8 resulted in the development of algorithms and 1 resulted in an algorithm with good predictive potential without further analysis. All linkages would benefit from further analysis with more data (performance and weather), and further investigation into weather-driven and non-weather-related causal factors for the responses.

Correlations have been compared with climate change projections from the latest available science to provide an indication of how the performance in these linkages might change in the future. For one linkage, a worked example has been prepared that illustrates how the predictive model can be used to make estimates of energy costs in the future using the UKCP09 Weather Generator.

Price: £400