RISING WATER Harnessing the Process of Sedimentation for a Flood Resilient Coastal Landscape
THE CHESAPEAKE BAY WATERSHED AdjAcencies
to
d e n s e ly d e v e l o p e d l A n d
Susquehanna
Potomac GunpowderPatapsco
2016 JANUARY - MARCH N
Severn Patuxent
N York
No Data Collected
APRIL
Eastern Shore James
11º
355º
N
Rappahannock 168º
194º
² rising water levels, vulnerable land, and sedimentation Development Density
MAY
Most Developed
128,000
256,000
384,000
N
512,000 Feet
9º
º 339
3º
0
Waterbodies
23
Least Developed
184º
As threats of climate induced sea level rise are becoming more tangible within the Chesapeake Bay Watershed, it is necessary to incorporate built infrastructure and natural systems into mitigation strategies that allow the landscape to adapt over time. A multi-layered defense strategy employed on this site dissipates wave energy, accretes sediment, restores wetlands, and provides a final barrier to rising water while maintaining cultural and ecological relationships. JUNE N
7º 356º
172º
191º
JULY N
12º
342
º
185º
164º
SEDIMENT IN THE POTOMAC RIVER AMOUNT OF POTENTIAL ACCRETION OVER TIME
2016 JANUARY - MARCH
2016 N JANUARY - MARCH
AUGUST
N
N 7º 356º
N No Data Collected
APRIL
168º
194º
NOAA Upper Potomac Interpretive Buoy
182º
º
201
N
11º
355º
N
No Data Collected MAY
SEPTEMBER
N APRIL
N 11º
17º
355º
N
357º
Potomac River
9º
339º
Cameron Run 23
3º
184º
JUNE N 7º 356º
178º 191º
191º
ºº 168172
194º
14 feet Storm Surge
Hunting Creek
JULY
23 201º
183º
184182º º
1º
21
3º
2 feet Sea Level Rise
Dyke Marsh Eroded Marsh
SEPTEMBER
NOVEMBER
N JUNE 17º
357º
N
N
7º
º
178º 191º
Approximate volume of sediment per year that was measured at the Potomac River Input Monitoring Station.
338
7º 356º
88,286,667 FT3/YR
8º
N 7º
MG/YR
358º
AUGUST
Approximate amount of suspended sediment per year measured at the Potomac River Input Monitoring Station.
356º
Where the Potomac Transitions into a Tidal River at Little Falls Dam
185º
1
164º
RIVER INPUT MONITORING STATION
N
N
9º
º 339
4 feet Sea Level Rise
12º
342º
6 feet Sea Level Rise
2,500,000
OCTOBER
MNAY
OCTOBER N
8º
358º
Historic Dyke Marsh Promontory 170º
7º
9º
6º
32
12º 170º
185º
9º
AUGUST
Eroded Land
N
178º
Flood Lines
Fill
6º
20
2,000 feet
178º
Cut
1,000
185º
Tidal Range
7º 356º
Approximate potential gain of sediment on coastlines following the implementation of sediment accretion infrastructure.
0
6º
²
2,000 feet
164º
1,000
0
20
FT3/YR
N
6º
SITE REGION
DECEMBER
32
70,629,333
N
N
º
C
²
185º
183º
Of sediment littoral drift is located outside of the surf zone, which coresponds to the existing channel line.
80% of Littoral Drift happens Outside of the Surf Zone
3
º 338
80%
SURF ZONE
DECEMBER
N JULY
342
2
172º
1912 º
11 º
C
NOVEMBER
Flood Vulnerability Pre-Development
182º
º
201
SEPTEMBER N 17º
357º
178º 191º
4
OCTOBER N
8º
358º 183º
1º
21
5
NOVEMBER N
7º
338
6
º
170º
185º
C
DECEMBER N 9º
6º
32
7
178º
6º
20
8
1 Site Features: 1. Beach Breakwaters 2. Flood Detention Area 3. Water Channel
0 300 600 900 1,200 feet
4. Belle View Neighborhood 5. George Washington Memorial Parkway 6. Coastal Breakwaters
9
7. Dyke Marsh Trail
²
Flood Vulnerability Post-Development
11 10
11
8. Dyke Marsh 9. Mount Vernon Trail
12
10. Marina 11. Lookout Point 12. Marina Park
²
0
300
600 feet
Introduced infrastructure alters river currents and encourages sediment deposition so the land may build and restore itself over time
2020
ALL ATION
2040 76,400,000
FT 3
2060 152,800,000
FT 3
2080 229,200,000
2100
FT 3
305,600,000
FT 3
² 0
1000
2000
²
0 300 600 900 1,200 feet
3000 Feet
Channel
Sea Level Rise
George Washington Memorial Parkway
Beach Breakwater and Mount Vernon Trail
Coastal Breakwater
0
10
20
30
40 Feet
PAIGE COURTNEY 2017
LANDSCAPE ARCHITECTURE PROGRAM WASHINGTON ALEXANDRIA ARCHITECTURE CENTER SCHOOL OF ARCHITECTURE + DESIGN COLLEGE OF ARCHITECTURE AND URBAN STUDIES VIRGINIA POLYTECHNIC INSTITUTE AND STATE UNIVERSITY