An evaluation of the benefits of source control measures at the regional scale

Coombes, Peter J; Kuczera, George; Kalma, J. D.; Argue, John R.

doi:10.1016/s1462-0758(02)00028-6

Cited by 65 publications

(39 citation statements)

References 2 publications

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“…The setting of the weights helps to identify optimal solutions among all Pareto solutions in a multi-objective problem. The objective function of the spatial planning model is to minimize the highest depth (D i ) and duration (T i ) of inundation among all sub-catchments as well as the number of inundated points (H) in the watershed after implementing LID, as shown in Equation (3), and the constraints are expressed in Equations (4)- (8). ω D , ω T , and ω H are weights.…”

Section: Lid Spatial Planning Modelmentioning

confidence: 99%

Low Impact Development Planning and Adaptation Decision-Making under Climate Change for a Community against Pluvial Flooding

Chen

Tung

2017

Water

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This study integrates and develops methods, namely low impact development (LID) selection method and an LID spatial planning model, to enable decision-making to minimize pluvial flooding for a community. The objective is to minimize the flood risk under the worst case of the design storm within the budget constraints. Design storms in current and future climate scenarios are analyzed as input to the Storm Water Management Model (SWMM). Then, LID practices are selected based on the proposed procedure and a spatial planning model is built to identify the optimal LID layouts using the simulated annealing (SA) algorithm. The lower and upper bounds of the generated rainfall intensities of a five-year 1-h duration design storms for the Hadley Centre Global Environment Model version 2 for the atmosphere and oceans (HadGEM2-AO), the Norwegian Earth System Model (NorESM1-ME), and the CSIRO-Mk3.6.0 Atmosphere-Ocean GCM (CSIRO-Mk3.6.0) during 2021-2040 are derived. The LID selection helps efficiently identify appropriate LID. Results show that nearly no flood occurs under the optimal LID layouts found by the LID spatial planning model. Moreover, it is more optimal to invest in LID in the lower sub-catchments in LID planning when the budget is limited. These methods are generally applicable for a community using LIDs as adaptation measures against pluvial flooding.

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Section: Lid Spatial Planning Modelmentioning

confidence: 99%

Low Impact Development Planning and Adaptation Decision-Making under Climate Change for a Community against Pluvial Flooding

Chen

Tung

2017

Water

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“…Distributed local options, such as SBs, are installed and operate throughout existing centralized water cycle systems to modify the cumulative demand for traditional services and improve the behaviour of a more diverse water system (Coombes et al 2002;Coombes 2005). Analysis of the impact of distributed options within centralized systems requires adequate detail to capture the variable changes in behaviour that are driven by spatial and temporal variations in climate, demographic, socio-economic, topographic, ecological and infrastructure considerations.…”

Section: Understanding Boundary Conditions Of Economic Analysis Of Sbmentioning

confidence: 99%

“…In addition, Coombes (2007) found that widespread installation of rainwater harvesting at residential dwellings generates net present value savings in the provision and operation of large-scale water infrastructure, for the period 2010-2050, ranging from $57 to $6371 for each dwelling with a rainwater harvesting system. Building scale solutions can provide substantial improvements in the security of urban water supplies that defer requirement for augmentation (Coombes et al 2002;Coombes 2005;Coombes and Barry 2014).…”

mentioning

confidence: 99%

Resolving boundary conditions in economic analysis of distributed solutions for water cycle management

Coombes¹,

Smit²,

MacDonald³

2016

Australian Journal of Water Resources

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Over the last 30 years leading thinkers have taken us beyond mechanistic and reductionist analysis into systems theory and the critical boundary judgements that are fundamental to systems analysis. In defining and discussing boundary conditions, we also redefine values and facts imposed on hydrological and economic analysis that underpins decisions about government policy in water resources. The repeal of legislation for distributed interventions (water-efficient appliances and rainwater harvesting) that was previously enacted to improve the security of a regional water supply system is examined as a case study. The results of the analysis were defined by the costs and benefits that are inside or outside of the boundaries of legitimate and recognized consideration. This paper refers to those differences as boundary conditions and considers how those boundary conditions affect the outcome of analysis. Setting of boundary conditions (what is included, what is excluded and assumptions) in engineering and economic analysis dominates outcomes of decisions about government policy. These insights have general application to development of government water policy. The investigations outlined in this paper were combined to create an enhanced version of a systems analysis of a policy for setting targets for water savings on all new dwellings. It was established, using appropriate boundary conditions, that a 40% target for water savings is feasible for South East Queensland (SEQ) and provides a cost-benefit ratio of 2.1. These results indicate that a policy of mandating targets for sustainable buildings would provide substantial benefits to the state of Queensland, water utilities and citizens.

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“…This includes Water Sensitive Urban Design (WSUD) which recognizes the role rainwater harvesting can have in substituting and/or supplementing reticulated urban water supply from centralised water supply facilities (Mitchell, 2004). In addition rainwater harvesting has the potential to reduce the volume of stormwater discharge and reduce peak run off rates (Coombes et al, 2002). Research has also demonstrated the economic viability of rainwater harvesting systems at both local and regional scales (Coombes et al, 2000).…”

Section: The Use Of Rainwater Harvesting Systems In Developed Countriesmentioning

confidence: 99%

The perceived barriers to the inclusion of rainwater harvesting systems by UK house building companies

Parsons¹,

Goodhew²,

Fewkes³

et al. 2010

Urban Water Journal

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This work investigates the barriers that exist to deter the implementation of rainwater harvesting into new UK housing. A postal questionnaire was sent to a selection of large, medium and small house-builders distributed across the UK. Questions were asked concerning potential barriers to the inclusion of rainwater harvesting in homes separated into five sections; (1) institutional and regulatory gaps, (2) economic and financial constraints, (3) absence of incentives, (4) lack of information and technical knowledge, and (5) house-builder attitudes. The study concludes that although the knowledge of rainwater systems has increased these barriers are deterring house-builders from installing rainwater harvesting systems in new homes. It is further acknowledged that the implementation of rainwater harvesting will continue to be limited whilst these barriers remain and unless resolved, rainwater harvesting's potential to reduce the consumption of potable water in houses will continue to be limited.

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An evaluation of the benefits of source control measures at the regional scale

Cited by 65 publications

References 2 publications

Low Impact Development Planning and Adaptation Decision-Making under Climate Change for a Community against Pluvial Flooding

Low Impact Development Planning and Adaptation Decision-Making under Climate Change for a Community against Pluvial Flooding

Resolving boundary conditions in economic analysis of distributed solutions for water cycle management

The perceived barriers to the inclusion of rainwater harvesting systems by UK house building companies

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