IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 33rd Congress - Vancouver (2009) : Special Seminars : Evaluating the impacts of climate change on water supplies: approaches and examples
Evaluating the impacts of climate change on water supplies: approaches and examples
Author : Richard N. Palmer
There is evidence that long-term climate changes have begun to alter streamflow patterns throughout the world. This talk will focus on the changes that are taking place in the Northwestern portions of the US in the Puget Sound Region. Here, changes have been particularly noticeable during spring and summer months, and these changes will likely continue throughout the 21st century. This talk explores our ability to evaluate such changes in general and the ability of regional water supply systems to meet future demands in the face of such changes. For the purposes of this study, three general circulation models (GCMs) were identified as appropriate to capture future potential climate change for the Pacific Northwest region. Using GCM output and historic weather records, extended meteorological sequences of 76 years were created to represent the climate of the years 2000, 2025, 2050, and 2075. These climate impacted meteorological sequences were then used to drive a set of hydrology models which in turn generated streamflows usable in water supply models to explore future regional water supply capabilities, including the impacts of population growth and climate change. These models simulate the water supplies of the cities Seattle, Everett, Tacoma, and Bellevue. These cities lie in a metropolitan region that has a combined population of 3.2 million people. Given alternative climate conditions, forecasted demands, and current system operating procedures, the four water supply simulation models are used to explore the future of water supply in the Puget Sound Region. The performance of each water supply system is characterized. Alternative operating procedures that considering shifting the hydrological patterns are suggested as one of many approaches to mitigating the impacts of climate change.
File Size : 28,895 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 33rd Congress - Vancouver (2009)
Article : Special Seminars
Date Published : 09/08/2009
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