the cape fear and climate resilience - ncsu
TRANSCRIPT
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The Cape Fear and Climate Resilience
Water Resources Research Institute Conference
River Stories: the Cape Fear River
Wednesday, March 5, 2017
Created in 2003 out of the Sustainable Fort Bragg initiative, Sustainable Sandhills is a tiny nonprofit with a giant mission- to save the planet and preserve the environment of the Sandhills through education, demonstration, and collaboration.
Sustainable Sandhills serves an 9 county region surrounding Fort Bragg: Cumberland, Harnett, Hoke, Lee, Montgomery, Moore, Richmond, Robeson, and Scotland.
Clean Air, Clean Water, Green Business, Green Schools
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Image source: US Army Corps of Engineers, Water Management
1945 - Cape Fear flooding Downtown Fayetteville
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B. Everett Jordan Dams Cape Fear River
Corps of Engineer’s comprehensive water resource study leads to “New Hope Reservoir” in 1963
Construction begins 1967
Impoundment starts 1981 and lake reaches normal pool stage in 6 months
Image source: US Army Corps of Engineers
CURRENT DAM STATS
1984 Satellite image
2016 Google Earth
PURPOSES:FOR FLOOD CONTROL, WATER SUPPLY, RECREATION, FISH AND WILDLIFE ENHANCEMENT, AND AUGMENTATION OF LOW FLOWS FOR PURPOSES OF POLLUTION ABATEMENT AND WATER-QUALITY CONTROL IN THE CAPE FEAR RIVER BASIN.
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CURRENT DAM STATS
1984 Satellite image
2016 Google Earth
Uncontrolled flood storage (240.0-261.5) 9.91 (runoff inches) 893,000 (acre-feet)Controlled flood storage (216.0-240.0) 5.97 538,430 Conservation storage (150.0-216.0) 2.39 215,130 Sedimentation 0.83 74,700 Water supply 0.51 45,810 Water quality 1.05 94,620
CURRENT DAM STATS
1984 Satellite image
2016 Google Earth
Surface areas (ft., m.s.l.): Acres Spillway design flood (elevation 261.5) 51,830 Standard project flood (elevation 246.2) 37,130 Top of flood control pool (elevation 240.0) 31,800 Top of conservation pool (elevation 216.0) 13,940 Bottom of conservation pool (elevation 150.0) 0
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2016Cape Fear
Floods Downtown
Fayetteville
Floodplains in Fayetteville
Floodway
100 Year Flood
500 Year Flood
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Hurricane Matthew Damage
Hurricane Matthew Damage
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Watershed Management and Climate Resilience
A Local Perspective
Severe Weather Trends and Projections
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Heavy Precipitation Trendsand Projections
Images source: U.S. National Climate Assessment, U.S. Global Change Research Program.
Potential Water Quality Impacts
Infrastructure vulnerability
Agriculture runoff
Drinking water cross-
contamination
More polluted and
contaminated stormwater
(drought induced)
Map source: Forest Service, USDA; Stein, et. al. Private Forests, Public Benefits…, 2009.
Watersheds by Potential for Change in Water Quality due to Housing
Density Projections
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B. Everett Jordan Dam and LakeWatershed Rainfall Annual Average
1982-2013
Average Rainfall (inches) Linear (Average Rainfall (inches))
Potential Water Quantity Impacts
Infrastructure vulnerability
Water flow timing
Natural and climate
induced human population
growth and demand
Water-use norms could
become taboo!
Data source: US Army Corps of Engineers; graph produced by Sustainable Sandhills.
2017Infrastructure Report Card:
Dams and Levees
American Society of Civil Engineers
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Flooding and Watershed Management Strategies
1. Integrate Climate Projections Into all
Planning and Natural Area
Conservation Efforts
2. Regional Water Use Plan, Green
Infrastructure and Water-Wise “Norms”
3. Equal Access for Vulnerable Populations
4. Renewable Energy and Sustainable
Development
WHAT STORY IS THE CAPE FEAR RIVER TELLING?
Hanah Ehrenreich, Executive DirectorAlba Polonkey, Sustainability Manager
(910) 484-9098