STORMWATER HARVESTING AS A WATER SOURCE FOR SOUTH-EAST QUEENSLAND

摘要

Recent droughts in South-East Queensland (SEQ) and other Australian cities have driven investigations into alternative sources of supply to assist with water security. The capture and use of stormwater is one source that can be used to replace potable supplies and thereby take pressure off central supplies. At the same time the environmental impact of urban run-off has led to improved stormwater management practices. These two drivers are leading to new practices and design approaches for stormwater management.rnTo facilitate the uptake of stormwater harvesting the Queensland Water Commission (QWC) commissioned a consultancy to investigate Stormwater Infrastructure Options to Achieve Multiple Water Cycle Outcomes.rnThrough assessment of case studies in SEQ, the consultancy provided:rn1. Cost and performance details of stormwater infrastructure for key types of greenfield developments to meet supply, quality and flow outcomesrn2. Analysis of the influence of key variables on cost and performance of infrastructure such as slope, rainfall, development type/intensity, demand, and storagern3. Identification of development scenarios where supply volumes beyond the water savings target could be achieved.