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Water Scarce City - A Green Future for Urban Water Supply?

Philip Kruse
Research Associate at Institute for Spatial Planning (IRPUD), TU Dortmund

Water seems to be ubiquitous on our planet, but freshwater is in fact very limited. Its uneven distribution results in 40% of the global population being affected by water scarcity. (United Nations, 2017) In the face of growing cities and increasing freshwater-related risks of climate change (IPCC, 2014), water supply in semi-arid regions appears to be a hopeless endeavor. However, Low Impact Development (LID) controls used for rainwater harvesting might offer relief, as they might contribute to increase drought resilience of the urban water supply through freshwater substitution.
The East Village neighborhood of San Diego, a growing and highly urbanized part of the driest region of the US, is applied as a case study (SANDAG, 2013; Garfin et al., 2014). The neighborhood’s water supply system is enhanced for modeling purposes by applying green roofing to flat roofs and bioretention areas to open spaces. The assessment is being made by looking into the volumes of stormwater retained and its quality after being treated by LID controls.

The poster of this colloquium can be found here.