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Objective

Scenarios of Global Municipal Water Use Demand Projections over the 21st Century. Objective Estimate how large future global municipal water use will be by year 2100, and which factors (population, income, technology, or efficiency) dominate the direction of change in different regions.

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Objective

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  1. Scenarios of Global Municipal Water Use Demand Projections over the 21st Century • Objective • Estimate how large future global municipal water use will be by year 2100, and which factors (population, income, technology, or efficiency) dominate the direction of change in different regions. • Establish water demand capabilities in the Climate Change Assessment Model (GCAM). • Approach • Incorporate the global municipal water use model endogenously in GCAM in an internally consistent fashion with all existing GCAM system components. • Reconcile data on water use, price, technology, income, and others from various sources to construct a global model with regional specificity. Growth in total municipal water withdrawal by the end of the 21st century for each of the 14 GCAM regions. • Impact • The global total water withdrawal increases from 466 km3/year in 2005 to 1098 km3/year in 2100 under the reference scenario, while withdrawals in the high and low tech scenarios are 437 km3/ year and 2000 km3/ year, respectively. • Enable the integrated assessment modeling community to tackle water issues. Hejazi M, J Edmonds, V Chaturvedi, E Davies, and J Eom. 2012 “Scenarios of Global Municipal Water Use Demand Projections over the 21st Century.” Hydrological Sciences Journal . In press.

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