Effect of Environmental Change on Water Supplies of Waterfront Groups.


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Newport News Waterworks Effect of Environmental Change on Water Supplies of Seaside Groups Brian L. Ramaley, P.E. Executive, Newport News Waterworks and President, Relationship of Metropolitan Water Organizations (AMWA) World Water Week 21 August 2008
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Newport News Waterworks Impact of Climate Change on Water Supplies of Coastal Communities Brian L. Ramaley, P.E. Chief, Newport News Waterworks and President, Association of Metropolitan Water Agencies (AMWA) World Water Week 21 August 2008

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Comprises the biggest openly claimed U.S. metropolitan water frameworks Members give drinking water to more than 127 million individuals in the U.S. Concentrate on the U.S. Congress, the Administration and Management Issues confronting metropolitan water suppliers. New center: Climate Change and International Outreach and Knowledge Exchange. AMWA – Leaders in Water

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Expand and improve AMWA\'s worth to US metropolitan drinking water utilities through access and engagement with comparable metropolitan utilities in different nations. Trade experience and information with utility administrators abroad and to give chances to distributed trade of thoughts and aptitudes. Universal learning trade on environmental change matters is of most prominent significance . AMWA’s International Involvement

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Presentation Outline Background on Newport News Waterworks Specific Impacts of Climate Change Conclusions for the Future

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Newport News Waterworks Municipally claimed framework that serves drinking water to more than 400,000 individuals 3 urban communities, two provinces, numerous army installations Mid-Atlantic area at mouth of Chesapeake Bay In beach front plain, normal rise < 10 meters

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Month Avg. High Avg. Low Mean Avg. Precip Jan 47°F 32°F 39°F 4.08 in. Feb 49°F 34°F 42°F 3.60 in. Deface 57°F 41°F 49°F 4.73 in. Apr 66°F 49°F 57°F 3.35 in. Might 73°F 58°F 66°F 4.03 in. Jun 81°F 67°F 74°F 3.44 in. Jul 85°F 72°F 79°F 4.86 in. Aug 84°F 71°F 77°F 4.74 in. Sep 78°F 65°F 72°F 4.84 in. Oct 68°F 53°F 61°F 3.45 in. Nov 60°F 44°F 52°F 3.35 in. Dec 51°F 36°F 44°F 3.43 in. Newport News Climate Information

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Newport News - Location Stockholm –> Atlantic Ocean Newport News Virginia North Carolina

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Newport News, VA Waterworks System and Water Sources Interconnected pumped stockpiling repositories and one waterway admission Chickahominy River is significant water source Surface water - 57 mgd safe yield taking into account 75-year record Groundwater desalination - 6 mgd yield 1 mgd = 3,785 cubic meters for each day 10,000 cubic meters for every day = 2.64 mgd

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Chickahominy River/Intake

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Brackish Groundwater Desalting

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Climate Change Impacts to Coastal Water Supplies Warmer temperatures Changing precipitation examples Rising ocean level

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Warmer Temperatures Higher dissipation/lower yield Higher interest Increased organic movement and effects on water quality/treatability

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Changing Precipitation Patterns More exceptional precipitation occasions/tempests Increased turbidity/residue/treatment obliged Faster repository refill – shoreline disintegration Spillways must pass more water Storm harm to offices – excess/dependability issues? More regular, serious or delayed dry seasons Higher watering system interest Reduced surface framework yields amid dry season Reduced groundwater energize/yield

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Rising Sea Level Inundation of administration range Surge effects to low lying territories amid tempests including water utility offices are amplified Salt water interruption into surface supplies Salt water interruption into groundwater Accelerated subsidence

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Summary of Historical Drought Studies: Newport News Water supply arranging in Eastern U.S. is commonly taking into account most extreme dry season in twentieth Century (e.g., 1930) Firm Yield of 57 mgd for 78-year streamflow record assessed for surface framework in view of 1930-2008 record

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Fort Monroe Constructed Between 1819 and 1834

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Updating Drought Studies to Include 19 th Century Records Monthly precipitation records stretch out back to 1836 for Southeastern and Central Virginia Standardized Precipitation Index (SPI) technique was utilized to look at 19 th and 20 th Century precipitation records Synthesized streamflows created from precipitation records Performed Firm Yield displaying with a 161-year streamflow record

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Rain Gage Locations Powhatan Hill, 1849-1876 Fredericksburg, 1893-1998 Richmond, 1872-1998 Williamsburg, 1900-1998 Hopewell, 1888-1998 Newport News, 1899-1927 Hampton, 1869-1913 Fort Monroe, 1836-1890 Norfolk, 1871-1998

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20 15 Monthly Rainfall (inches) 10 5 0 1836-1899 1900-1998 1836-1998 Monthly Rainfall Datasets nineteenth and twentieth Century Rainfall Data Show Similar Means and Distributions

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Results of Firm Yield Modeling with 161-Year Streamflow Record Four nineteenth Century dry seasons are more serious than the most exceedingly awful twentieth Century dry spell Minimum Firm Yield is 42 mgd (1851-55 dry spell) twentieth Century dry spell of record (1930): 57-mgd Firm Yield compares to a 22-year return period (instead of a 75-year return period) Firm Yield for a 75-year return period is 44.5 mgd

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Implications for Water Supply Planning Studies Consideration of nineteenth Century dry spells can essentially change assessments of existing framework dependability and future needs. Late dry spells and tempests show an arrival to precipitation conditions in the mid-Atlantic district more like the 1800s than the 1900s. Are the 1800s a superior model for environmental change sways regarding yield?

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Newport News Response Curves

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Estimated Sea Level Rise at NN – 3 to 4 mm/year Relative Sea Level Rise Along the East Coast of North America From Zhang et al. (2004) Climatic Change 64: 41–58.

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Hurricane Isabel Sep 18-19, 2003 Reagan Washington National Airport Chesapeake Inundation Prediction System (CIPS) SLR 2008 SLR 2025 SLR 2050 SLR 2075 SLR 2100

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Hampton Roads Inundation Estimates Under Different Sea Level Rise Scenarios Extent of flooding is an element of: - tallness of water - land height - land alleviation With expanding ocean level, extra flooding from tempest surge impacts will be more prominent than already - littler tempests will have identical demolition potential as bigger tempests pre-SLR Important ramifications for both human populaces and in addition living assets and beach front situations From Titus and Wang (2008) EPA.

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Conclusions for the future Climate change will affect beach front water supplies in different ways Regional demonstrating and downscaling of worldwide models are expected to foresee temperature, ocean level ascent, configuration tempests and dry spells Combination of effects must be viewed as Existing yields and wellbeing components are in all likelihood wrong – high or (more probable) low

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Conclusions for the future Diversification of water supplies will upgrade unwavering quality – Security Through Diversity Looking further back in time may be a helpful method for evaluating the future atmosphere Integrated asset arranging standards offer a guide Redundancy/dependability concer

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