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portada Review of the new York City Department of Environmental Protection Operations Support Tool for Water Supply
Type
Physical Book
Publisher
Author
Year
2019
Language
English
Pages
214
Format
Paperback
ISBN13
9780309482790
Categories

Review of the new York City Department of Environmental Protection Operations Support Tool for Water Supply

National Academies Of Sciences Engineeri; Division On Earth And Life Studies; Water Science And Technology Board (Author) · Natl Academy Pr · Paperback

Review of the new York City Department of Environmental Protection Operations Support Tool for Water Supply - National Academies Of Sciences Engineeri; Division On Earth And Life Studies; Water Science And Technology Board

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Synopsis "Review of the new York City Department of Environmental Protection Operations Support Tool for Water Supply "

New York City’s water supply system is one of the oldest, largest, and most complex in the nation. It delivers more than 1.1 billion gallons of water each day from three upstate watersheds (Croton, Catskill, and Delaware) to meet the needs of more than eight million people in the City, one million people in Westchester, Putnam, Orange, and Ulster counties, and millions of commuters and tourists who visit the City throughout the year. The Catskill and Delaware portions, which make up about 90 percent of the supply, receive no filtration or treatment other than disinfection, except for rare instances of high turbidity when a coagulant is added to increase deposition of suspended solids. The remaining 10 percent of the supply comes from the Croton watershed and receives treatment via filtration. The drinking water supply is managed by the Bureau of Water Supply within the New York City Department of Environmental Protection (NYC DEP). To continue to avoid filtration of the Catskill/Delaware portion of the water supply, in 2007, NYC DEP reexamined its control of turbidity in the Catskill portion of the water supply, including both structural improvements to the system and operational changes. The Operations Support Tool (OST) was developed as part of these efforts. OST couples models of reservoir operations and water quality; it uses real-time data on streamflow, snow pack, water quality, reservoir levels, diversions, and releases; and it incorporates streamflow forecastsâ€"all in order to predict future reservoir levels, water delivery to customers, and water quality within the system. These predictions inform the system operators, who then make decisions based on the most current data and forecasts. This report reviews the use of OST in current and future reservoir operations. It considers potential ways in which the City can more effectively use OST, makes recommendations for additional performance measures, and reviews the potential effects of climate change on the City’s water supply to help identify and enhance understanding of areas of potential future concern with regard to the use of OST. Table of ContentsFront MatterSummary1 Introduction2 Description of the Operations Support Tool3 Metrics for the Catskill Turbidity Control Program4 Use of OST Within the Environmental Impact Statement for Modifications to the Catalum SPDES Permit5 Use of OST in a Changing Climate6 Enhancements and Future Uses of OSTAppendix A: Observed Hydrologic TrendsAppendix B: Use of Climate and Hydrologic Models for Projecting Future Water ResourcesAppendix C: Glossary of TermsAppendix D: Biographical Sketches of Committee Members and Staff

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