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Lake Tuscaloosa, an artificial impoundment that serves as a public water supply, is located in Tuscaloosa and Fayette counties in the State of Alabama, in the Southeastern United States. Recent studies and monitoring of the lake show high levels of E.coli bacteria in the upper parts of the lake (near the main stream entrances) during periods of high stream flow. These high levels of E.coli are a concern for many different interested parties in the area. The city is under pressure to strengthen its management, monitoring, and control of existing and future pollutant sources (mostly land development) around the lake that is in its jurisdiction. Additionally, the city has to consider other sources of bacteria in the watershed outside of its jurisdiction as potential causes of these elevated bacteria levels.The decision analysis framework and modeling schemes developed as part of this research examine flow, E.coli sources and transport issues, along with potential solutions. The decision analysis framework assisted at different stages of the project during the collection and management of the information that helped in the analysis of the problems and solutions. The flow and E.coli watershed models assisted in the analysis of the available data for the watershed to identify locations, seasons, and flow ranges

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Water is one of the most vital elements needed for life. In many countries water supplies, especially for critical drinking water, are either being depleted or polluted. Too often these problems are magnified due to the lack of reliable drainage systems that provide proper stormwater and sanitary sewage collection and treatment of human generated wastewater. These problems cause health concerns and impact the quality of life. Solutions in one country are not necessarily transferable to another, as every community is unique; each community has special needs for water and drainage systems. Too often in the past, countries have tried to implement systems that are not suitable to their local needs and concerns. Consequently, there is a global need to create a systematic decision analysis tool to provide strategies for finding sustainable water resources and drainage systems solutions. A new sustainable decision analysis system is developed to address these problems and concerns. This paper serves as an introduction for future more fully developed examinations of various urban water use and drainage issues worldwide, such as water supplies polluted with arsenic, and water reuse in arid regions.