1. Glen Canyon Dam
Determining Best Management Practices

2. Glen Canyon Dam Location
Source:

3. Glen Canyon Dam Determining Best Management Practices Flow
Sedimentation
Temperature

4. Flow Fluctuation Statistical Summary Pre-Dam Post-Dam Flows Frequency
Pre-Dam
Post-Dam
Flows
Frequency
Mean Daily Flows
>30,000
18%
> 30,000 3%
Daily Fluctuation
12-16,000 cfs
Spring Flows
>100,000 cfs
Summer- Winter Flows
< 3,000cfs
Low Flows
< 5,000 cfs
16%
10%
Temp Degrees F
40-80 46
Flow Statistics Source:

5. Sedimentation Trapped Sediment Decrease Storage Capacity
Concentrates Toxic Compounds
Lack of Floods
Channels Are not Scoured
Beaches are Not Replenished

6. Controlled Flood 45,000 cubic feet per second (cfs)
from March 26 to April 2, 1996
Pre 1996 flood Source: USBR
Post 1996 flood Source: USBR

7. Sedimentation Controlled Floods
Satellite Imagery and Aerial Photography to map Habitat
Compare Habitat to Species Vitality

8. Hydraulic Model Base Combine Bathymetry and DEM

9. Temperature Temperature Averages 46yF Year Round
Non-native Species Flourish
Native Species Diminish

10. Future Work Research data on sand bar formation
Map pre/post temperature data for monitoring points
Map pre/post WQ data
Goal: Find relationship between these data and the general health of the eco system and vitality of natural species to maximize operational beinfits and minimize ecological impacts.

11. Questions
Thank You