Integrated land use and multiple water supply-demand modelling framework: a peri-urban case study

Abstract

The South Creek catchment with an area 620 km2 confronts increased competition between potable water, irrigation and environmental flows. Peri-urban areas also generate a large volume of effluent and stormwater and can often meet some or all the irrigation and industrial water needs provided adequate infrastructure is available. An adequate harmonisation of these multiple supplies and land use using a total system analysis approach leads to a better understanding and evaluation of the limitation and opportunities to enhance the overall performance of the system. This paper descriers the developed modelling framework to simulate water supplies and forecast future demands and integrate supplies and demands in finding water allocations with different climate change and land use scenarios. The integrated model is applied to the South Creek catchment to plan future land use and water supply in an environment of water scarcity under system harmonisation water resources management concept.