baird claytor hydroelectric project sedimentation study
TRANSCRIPT
![Page 1: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/1.jpg)
Baird
Claytor Hydroelectric ProjectClaytor Hydroelectric ProjectSedimentation StudySedimentation Study
![Page 2: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/2.jpg)
Baird
Overview
I. Project Description
II. Objectives
III. Relicensing Relevance
IV. Project Tasks
V. Project Schedule
Baird
![Page 3: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/3.jpg)
Baird
I. Project Description
The proposed tasks are specifically designed to meet the objectives of the Sedimentation Study Plan for Claytor Lake and the integrated licensing process. They include;
bathymetric analyses, watershed sedimentation models, watershed, river, and reservoir field surveys, reservoir sedimentation models, literature reviews
Baird
![Page 4: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/4.jpg)
Baird
I. General Area - Claytor Watershed
![Page 5: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/5.jpg)
Baird
I. Claytor Lake
![Page 6: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/6.jpg)
Baird
I. New River to Hwy 460 Bridge, Glen Lyn
![Page 7: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/7.jpg)
Baird
II. Objectives1. Update surface area and storage volume curves,
2. Determine areas of sediment accumulation,
3. Determine sediment accumulation rate during existing and new license terms,
4. Determine flow modification impacts on downstream sediment dynamics, including;
1. assessment of how altered sediment dynamics affect downstream channel morphology,
2. Identify how physical changes have impacted beneficial uses,
3. and characterize attenuation in sediment impacts from Claytor Dam to Rte. 460 Bridge at Glen Lyn.
![Page 8: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/8.jpg)
Baird
II. Objectives, contd.5. Identify the extent of problems associated with the
accumulation of sediments within the reservoir and downstream of the dam, including impacts on recreation, the fisheries, and aesthetics.
6. Identify the sources of sediments discharging into the reservoir.
7. Investigate methods to prevent/reduce reservoir sedimentation impacts.
![Page 9: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/9.jpg)
Baird
III. Project Re-licensing Relevance
Sedimentation within the project reservoir and downstream river can have a significant impact on recreational uses, shoreline development, and project generation. Identification of where sediment accumulation may be most pronounced will provide information relative to the development of potential control measures, if needed.
![Page 10: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/10.jpg)
Baird
IV. Project Tasks
Directly follow Objectives and Sedimentation Study Plan
Developed during the scoping and study plan drafting phase of the Claytor ILP process.
Baird
![Page 11: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/11.jpg)
Baird
Objective 1 Tasks
Update surface area and storage volume curves
1. Review existing curves
2. Develop new area/volume data
3. Develop new area/volume curves
4. Determine changes in area/volume
![Page 12: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/12.jpg)
Baird
Updated Bathymetric Data Analyses
![Page 13: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/13.jpg)
Baird
Smith Mountain Lake Reservoir Capacity Estimates
710
720
730
740
750
760
770
780
790
800
200 400 600 800 1000 1200
Storage Capacity (1,000's acft)
Ele
vatio
n (f
t, N
VG
D)
AEP - 1964
AEP - 2006
![Page 14: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/14.jpg)
Baird
Objective 2 Tasks Determine areas of
sediment accumulation Compare existing and
updated storage-volume curves
Determine at what elevation storage losses occur
700
710
720
730
740
750
760
770
780
790
800
100 300 500 700 900 1,100 1,300
Storage Capacity (1,000's acft)
Ele
vatio
n (N
GV
D)
-600 -400 -200 0 200 400 600
1964 to 2006 Volume Change (1,000's acft)
1964
2006
Change per contour
![Page 15: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/15.jpg)
Baird
Task 3: Sedimentation Changes
![Page 16: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/16.jpg)
Baird
Generate “shoaling” maps to illustrate potential areas where sediment may be exposed at various water levels
• Upper Pool Limit
• Lower Pool Limit
• Other conditions ?
![Page 17: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/17.jpg)
Baird
Objective 3 Tasks
Determine sediment accumulation rate during existing and new license terms
1. Existing rates calculated from results of Objectives 2 and 6.
2. Future rates - develop hydrodynamic reservoir sedimentation model.
3. Model calibration & validation.4. Conduct sedimentation simulations
1. Existing conditions2. Future scenarios
Land use change Climatic variability / change
![Page 18: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/18.jpg)
Baird
Model Validation and Calibration
1. Model calibrated to measured reservoir currents
1. ADCP – spring, summer1. five units deployed,2. measure currents in all directions,3. exact location and logistics TBD
2. Reservoir levels
3. Watershed inputs (Obj. 6)
![Page 19: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/19.jpg)
Baird
Hydrodynamic Reservoir Model
![Page 20: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/20.jpg)
Baird
Hydrodynamic Reservoir Model
![Page 21: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/21.jpg)
Baird
Sedimentation scenarios
1. Future watershed alternatives (Obj. 6)
2. Coordination with shoreline erosion wave climate, boat traffic, etc
3. Climatic variability1. Observed period of record
1. Typical2. Extremes
4. Redistribution of sediments
![Page 22: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/22.jpg)
Baird
Objective 4 Tasks
Determine flow modification impacts on downstream sediment dynamics, including;
1. assessment of how altered sediment dynamics affect downstream channel morphology,
1. Standard federal methods (USGS, USFS, COE)2. Conduct field survey of river sedimentation
1. Geomorphic river condition survey2. River habitat survey3. Hydraulic and sediment transport survey
3. Determine hydrodynamic and sediment flux regime4. Characterize fluvial processes5. Characterize morphologic response
![Page 23: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/23.jpg)
Baird
Geomorphic survey
![Page 24: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/24.jpg)
Baird
Geologic controls on fluvial system
Geologic Control
w/significantTributary
Alluvial River
Geologic River
![Page 25: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/25.jpg)
Baird
Geomorphic survey1. Sites
1. Hydraulic controls2. Access3. Existing surveys4. Other studies
1. IFIM2. Erosion3. Water quality
2. Field reconnaissance1. Width, Depth, Area2. Slope, Length3. Sinuosity
9091929394959697
0 1 2 3 4 5 6 7 8 9 1011121314151617181920212223242526272829303132333435
09/26/99
899091929394959697
0 1 2 3 4 5 6 7 8 9 1011121314151617181920212223242526272829303132333435
06/17/98
9091929394959697
0 1 2 3 4 5 6 7 8 9 1011121314151617181920212223242526272829303132333435
07/21/98
9091929394959697
0 1 2 3 4 5 6 7 8 9 1011121314151617181920212223242526272829303132333435
09/22/98
899091929394959697
0 1 2 3 4 5 6 7 8 9 1011121314151617181920212223242526272829303132333435
06/19/99
Cattle Trail
Cattle Trail
![Page 26: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/26.jpg)
Baird
Example of typical morphological results
0
2
4
6
8
10
12
14
16
18
Freq. Cattle Infreq. Cattle Forest
Wid
th D
epth
Rat
io
< Upstream - - - - - - - - - - - - - - - - - - - - Downstream >
![Page 27: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/27.jpg)
Baird
Example of typical habitat results
For illustrative purposes only, actual habitat survey methods and results may be coordinated with other studies.
![Page 28: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/28.jpg)
Baird
Hydraulics & stability
Number of methods Hydraulic analyses
WIN-XSPRO SIAM (U.S. Corps of Engineers)
Sediment Impact Assessment Model
Stability analyses WIN XSPRO Channel Stability Tool SIAM (U.S. Corps of Engineers)
![Page 29: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/29.jpg)
Baird
Hydraulics
![Page 30: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/30.jpg)
Baird
Channel Stability
![Page 31: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/31.jpg)
Baird
Objective 4 Tasks
Determine flow modification impacts on downstream sediment dynamics, including;
1. assessment of how altered sediment dynamics affect downstream channel morphology,
2. Identify how physical changes impact beneficial uses,1. Literature review2. Incorporate results from other studies3. Summarize results from VDEQ
![Page 32: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/32.jpg)
Baird
Objective 4 Tasks
Determine flow modification impacts on downstream sediment dynamics, including;
1. assessment of how altered sediment dynamics affect downstream channel morphology,
2. Identify how physical changes have impacted beneficial uses,3. and characterize attenuation in sediment impacts from
Claytor Dam to Rte. 460 Bridge at Glen Lyn.1. Develop mapping of field survey data2. Construct sediment flux/property profiles for along river
transect3. Construct river morphologic profiles along river transect
![Page 33: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/33.jpg)
Baird
Morphologic controls
Geologic Control
w/significantTributary
Alluvial River
Geologic River
![Page 34: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/34.jpg)
Baird
Downstream sedimentation features
Deposition patterns
• Bars
•Mid-channel
•Point bars
• Pool Deposition
• Island
![Page 35: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/35.jpg)
Baird
Downstream Impacts
![Page 36: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/36.jpg)
Baird
Changes in Sediment sizes & frequency
0
5
10
15
20
25
30
35
40
45
50
1 2 4 8 16 32 64 128
256
512
1024
2048
Bed
rock
Sediment Size (mm)
Fre
quen
cy
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Cum
ulat
ive
Fre
quen
cy
Site B (control)
Site A (OHV)
Site AB(downstream)
![Page 37: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/37.jpg)
Baird
Objective 5 Tasks
Identify the extent of problems associated with the accumulation of sediments within the reservoir and downstream of the dam, including impacts on recreation, the fisheries, and aesthetics.
1. Literature review2. Review relevant, local media sources3. Review results from similar re-licensing projects4. Incorporate results from other Claytor studies5. Summarize results from VDEQ
![Page 38: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/38.jpg)
Baird
Sedimentation Impacts
http://www.focl.org/NewFiles/drawdownatpark.jpg
http://www.focl.org/NewFiles/creaoldtack.jpg
http://www.focl.org/NewFiles/siltation.jpg
![Page 39: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/39.jpg)
Baird
Objective 6 Tasks
Identify the sources of sediments discharging into the reservoir.
1. Develop watershed sedimentation model1. Future development scenarios2. Impervious surfaces3. Climate change / variability4. Upstream dams - Buck & Byllesby, Fries
2. Characterize erosion from upland sources3. Develop watershed sediment budget4. Summarize sources by type, frequency, and magnitude.5. Identify “hot-spots” of erosion and sediment yield
within the project area.
![Page 40: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/40.jpg)
Baird
![Page 41: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/41.jpg)
Baird
![Page 42: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/42.jpg)
Baird
![Page 43: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/43.jpg)
Baird
![Page 44: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/44.jpg)
Baird
Development and impervious surfaces
![Page 45: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/45.jpg)
Baird
Appalachian climatic variability – precipitation and streamflow
rainfall energy
![Page 46: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/46.jpg)
Baird
Sediment sources – Influence of dams
![Page 47: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/47.jpg)
Baird
Objective 6 – modeling dam influences
![Page 48: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/48.jpg)
Baird
Objective 6 – Erosion vs. Sedimentation
![Page 49: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/49.jpg)
Baird
Objective 6 – Spatial modeling
![Page 50: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/50.jpg)
Baird
Objective 6 – example results
![Page 51: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/51.jpg)
Baird
Objective 7 Tasks
Investigate methods to prevent/reduce reservoir sedimentation impacts
1. Evaluate existing sediment control measures.
2. Identify potential measures that may be adopted to reduce future sedimentation.
3. Preserve watershed resources1. Soil resources2. Aquatic ecosystems3. Reservoir longevity
![Page 52: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/52.jpg)
Baird
![Page 53: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/53.jpg)
Baird
settling area with filtration
Area Reduction
broad based dip
culvert removal
Out-sloping roads
D.O
. – d
itch
obl
iter
atio
n
![Page 54: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/54.jpg)
Baird
V. Sedimentation Study Schedule
![Page 55: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/55.jpg)
Baird
Sedimentation Study Schedule
![Page 56: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/56.jpg)
Baird
III. Reporting
Pre-Project Meeting in January Two interim progress reports – tentatively
scheduled for May and November, 2007. Draft final report (~Jan., 2008). Final report (~ April/May, 2008)
1. Bound
2. Digital
3. DVD’s with all data, models, results, etc.
![Page 57: Baird Claytor Hydroelectric Project Sedimentation Study](https://reader036.vdocuments.site/reader036/viewer/2022062517/56649f1a5503460f94c2f76f/html5/thumbnails/57.jpg)
Baird
? Q U E S T I O N S ?? Q U E S T I O N S ?
Claytor Hydroelectric ProjectClaytor Hydroelectric Project
Sedimentation StudySedimentation Study
Application for New LicenseApplication for New License
FERC Project No. 739FERC Project No. 739