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Title: INVESTIGATING THE OPTIMAL MANAGEMENT OF THE HELPS ROAD DRAIN URBAN STORMWATER HARVESTING SYSTEM WITHIN THE CITY OF SALISBURY, SOUTH AUSTRALIA USING CONDITIONAL VALUE-AT-RISK

Author: P. Thomas, P.G. Howlett and J. Piantadosi

Year: 2009

Publisher: European Water Resources Association (EWRA)

Description:

We have created an SVG simulation tool for the analysis of urban stormwater harvesting systems and applied it to model the proposed Helps Road Drain scheme in the City of Salisbury, South Australia. The scheme consists of 5 inline storage facilities and an aquifer storage and recovery (ASR) system. The captured stormwater is harvested and may be subsequently pumped to consumers according to a contracted demand. We investigate a number of scenarios, such as extended wet or dry periods and reduced pumping, to evaluate the system’s performance. We use Conditional Value-at-Risk (CVaR) as a measure for comparing the scenarios with regards to overflow and supply shortfall from the system. Across all of the investigations we observed that reducing the pumping rates at the storages resulted in more feasible amounts of water being stored in the aquifer whilst maintaining flows and satisfying demand for stormwater. The simulations of the scheme highlighted some possible issues with the system and some suggestions were made to resolve them and improve its performance.