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Georgakakos,
Aristidis P.
Georgakakos,
Aristidis P.
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ItemACF River Basin: Climate and Demand Change Impacts and Mitigation Measures(Georgia Institute of Technology, 2011-04) Yao, Huaming ; Georgakakos, Aristidis P.This article presents the potential impacts of climate change on the Apalachicola -Chattahoochee- Flint (ACF) river basin (Figure 1) in the southeast US. The long term future basin inflow sequences corresponding to A1B and A2 climate change scenarios were used to drive a water resources model that incorporates the river network, all storage projects and hydroelectric facilities, water withdrawals and returns, instream flow requirements, and management procedures. The assessment criteria of impacts include reliability of water supply for municipal, industrial, and agricultural users with current demand level (year 2007) and future projection (year 2050); lake levels; environmental and ecological flow requirements; and hydropower generation. Results indicate that, under the climate change scenarios and with the current management procedures, the system will experience severe adverse water resources impacts such as extended reservoir drawdowns (Figure 2), water supply deficits (Figure 3), and frequent violations of instream flow requirements. Adaptive management procedures and modified operation rules are proposed and tested to mitigate the impacts of climate changes. The results indicate that such measures can significantly reduce adverse climate and demand change impacts (Figure 4 and Figure 5), but they need to be institutionalized as part of state and federal agency policies.
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ItemClimate variability and change assessments for the ACF and ACT river basins(Georgia Institute of Technology, 2003-04) Georgakakos, Aristidis P. ; Yao, HuamingClimate variability and potential change have important implications for the management of the ACF and ACT river basins. This article discusses these implications using a decision support system developed by the Georgia Water Resources Institute at Georgia Tech. These assessments are made for historical as well as for potential climates generated by General Circulation Models (GCMs). The most important conclusion is that water resources planning and management decisions, including the water compacts being negotiated, should explicitly recognize and address climate variability and uncertainty by being flexible and adaptive.
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ItemInformation systems for water resources monitoring and planning in the Lake Victoria Region(Georgia Institute of Technology, 1999) Georgakakos, Konstantine P. ; Yao, Huaming ; Brumbelow, James Kelly ; Bourne, Stephen ; De Marchi, Carlo ; Mullusky, Mary ; Artan, Guleid A. ; Sperfslage, Jason A. ; Georgakakos, Aristidis P.
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ItemA Control Model for Hydropower Systems Analysis and Operation(Georgia Institute of Technology, 1995-04) Georgakakos, Aristidis P. ; Yao, Huaming ; Yu, YongqingIn North America, hydropower provides a significant portion of the electrical capacity, ranging from about 60 percent in Canada, to more than 30 percent in Mexico, to about 13 percent in the U.S. (North America Hydroelectric Research and Development Forum, 1992). Among the attractive features of hydropower is that it is renewable, clean, efficient, economical., and domestically produced. In the U.S., the amount of hydroelectric production is equivalent to nearly 500 million barrels of oil annually, which, at today's oil prices, have a value of $9 billion. In addition to meeting electricity demands, hydropower facilities play a critical role in water management, helping to provide flood control and water for irrigation, municipal and industrial uses, navigation, recreation, and fish and wildlife preservation. Improving the way projects are operated is a top research need. It is worth noting that a 1 percent increase in the efficiency of existing hydro plants in the U.S. would provide an additional 3 billion kilowatt-hours of electricity annually, saving the equivalent of 1.4 million tons of coal or 4.9 million barrels of oil (North American Hydroelectric Research and Development Forum, 1992). The primary motivations for this research work are (1) to demonstrate that modem optimization methods can effectively optimize the utilization of hydropower facilities and (2) compare the relative performance of optimization and the more traditional simulation models. In this article, we take up the first task and describe the problems addressed, the models developed, and the results obtained. The second task will be the subject of a panel discussion.
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ItemImprovements to Water Resources Management Due to Climate Forecasts(Georgia Institute of Technology, 1977-08-01) Yao, Huaming ; Georgakakos, Aristidis P.