By Ken Howard; Dubravka Pokrajac

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The dilution effects of mains leakage have also previously been noted. 3 THE CHALLENGES FOR MODEL REPRESENTATION OF URBAN AQUIFERS Many cities are developed beside rivers or on aquifers. Although such locations have obvious benefits, one drawback is that the waste produced by the high density human (and animal) occupation is likely to enter the main water source. Minimizing water quality deterioration whilst maximizing available water yield is the principal task of all water planners, but the water quality constraint is particularly acute for urban aquifers.

As in most other groundwater modelling contexts, stochastic modelling is often an attractive way to attempt to indicate such uncertainties. When considering the evolution of the groundwater system in a city, or comparing present-day systems in developing cities with those in more established cities, continually advancing technologies and changing social systems mean that the key to the future does not necessarily lie in the past. This is not to say that history is not fundamental to understanding present-day groundwater flow and quality in a given urban aquifer: each urban system is unique – not just because every aquifer has a different physico-chemical composition, but because of the unique history of impacts that heavily concentrated human activity has on the underlying aquifer.

Optimization 2. Hydrologic Model(s) 3. Demand Forecasting 4. Feedback/Adaptive Permit Compliance Models Output Production Schedule Graphics, etc. 10 Components of the decision support system as envisioned by Hosseinipour Source: Hosseinipour, 2002 2002). Tampa Bay Water’s member governments include the cities of New Port Richey, St. 10), serving more than 2 million residents in the Tampa Bay region. 24 Urban groundwater systems modelling The OROP is a customized computer tool that uses forecasted surface water availability, rainfall data and current water-level conditions and operating constraints to determine how to rotate production among available well-field supplies to meet demands in an environmentally sound manner, for example, preventing wetland deterioration and sea water intrusion.

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