Integrated modelling of stormwater treatment systems uptake
Authored by A C Castonguay, M S Iftekhar, C Urich, P M Bach, A Deletic
Date Published: 2018
DOI: 10.1016/j.watres.2018.05.037
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Model Documentation:
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Abstract
Nature-based solutions provide a variety of benefits in growing cities,
ranging from stormwater treatment to amenity provision such as
aesthetics. However, the decision-making process involved in the
installation of such green infrastructure is not straightforward, as
much uncertainty around the location, size, costs and benefits impedes
systematic decision-making. We developed a model to simulate decision
rules used by local municipalities to install nature-based stormwater
treatment systems, namely constructed wetlands, ponds/basins and
raingardens. The model was used to test twenty-four scenarios of
policy-making, by combining four asset selection, two location selection
and three budget constraint decision rules. Based on the case study of a
local municipality in Metropolitan Melbourne, Australia, the modelled
uptake of stormwater treatment systems was compared with attributes of
real-world systems for the simulation period. Results show that the
actual budgeted funding is not reliable to predict systems' uptake and
that policy-makers are more likely to plan expenditures based on
installation costs. The model was able to replicate the cumulative
treatment capacity and the location of systems. As such, it offers a
novel approach to investigate the impact of using different decision
rules to provide environmental services considering biophysical and
economic factors. (C) 2018 Elsevier Ltd. All rights reserved.
Tags
Agent-based modelling
Infrastructure
Transitions
Adoption
Optimization
diffusion
Cost-benefit analysis
urban water management
Australia
Strategies
Framework
Exploratory modelling
Water infrastructure planning
Water sensitive
urban design
Melbourne