Ecologically Sustainable Water Management Defining the linkages between flows and ecosystems: Caddo...
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Transcript of Ecologically Sustainable Water Management Defining the linkages between flows and ecosystems: Caddo...
![Page 1: Ecologically Sustainable Water Management Defining the linkages between flows and ecosystems: Caddo Lake and its tributaries October 3, 2006 Jeff Opperman.](https://reader035.fdocuments.us/reader035/viewer/2022070305/551550aa550346c77d8b6577/html5/thumbnails/1.jpg)
Ecologically Sustainable Water Management
Defining the linkages between flows and ecosystems:
Caddo Lake and its tributaries
October 3, 2006
Jeff OppermanThe Nature Conservancy
[email protected] nature.org/freshwaters
![Page 2: Ecologically Sustainable Water Management Defining the linkages between flows and ecosystems: Caddo Lake and its tributaries October 3, 2006 Jeff Opperman.](https://reader035.fdocuments.us/reader035/viewer/2022070305/551550aa550346c77d8b6577/html5/thumbnails/2.jpg)
Proportion of U.S. Species at RiskProportion of U.S. Species at RiskProportion of U.S. Species at RiskProportion of U.S. Species at Risk
![Page 3: Ecologically Sustainable Water Management Defining the linkages between flows and ecosystems: Caddo Lake and its tributaries October 3, 2006 Jeff Opperman.](https://reader035.fdocuments.us/reader035/viewer/2022070305/551550aa550346c77d8b6577/html5/thumbnails/3.jpg)
Impaired Freshwater Biodiversity...Impaired Freshwater Biodiversity...
Hydrologic Alteration
…in addition to water quality, invasive species & direct habitat destruction
![Page 4: Ecologically Sustainable Water Management Defining the linkages between flows and ecosystems: Caddo Lake and its tributaries October 3, 2006 Jeff Opperman.](https://reader035.fdocuments.us/reader035/viewer/2022070305/551550aa550346c77d8b6577/html5/thumbnails/4.jpg)
Flow Regime(Master Variable)
PhysicalHabitat
Water Quality
EnergySupply
Species Interactions
Ecological Integrity& Ecosystem Services
Connectivity
![Page 5: Ecologically Sustainable Water Management Defining the linkages between flows and ecosystems: Caddo Lake and its tributaries October 3, 2006 Jeff Opperman.](https://reader035.fdocuments.us/reader035/viewer/2022070305/551550aa550346c77d8b6577/html5/thumbnails/5.jpg)
Ecologically Sustainable Water Management: developing flow recommendations
![Page 6: Ecologically Sustainable Water Management Defining the linkages between flows and ecosystems: Caddo Lake and its tributaries October 3, 2006 Jeff Opperman.](https://reader035.fdocuments.us/reader035/viewer/2022070305/551550aa550346c77d8b6577/html5/thumbnails/6.jpg)
E = ecosystem support H = human use
Traditional Approach to Water Management
From “Rivers for Life: Managing Water for People and Nature”
by Sandra Postel and Brian Richter (Island Press 2003)
![Page 7: Ecologically Sustainable Water Management Defining the linkages between flows and ecosystems: Caddo Lake and its tributaries October 3, 2006 Jeff Opperman.](https://reader035.fdocuments.us/reader035/viewer/2022070305/551550aa550346c77d8b6577/html5/thumbnails/7.jpg)
A Sustainable Approach toWater Management
E = ecosystem support H = human use
From “Rivers for Life: Managing Water for People and Nature”
by Sandra Postel and Brian Richter (Island Press 2003)
![Page 8: Ecologically Sustainable Water Management Defining the linkages between flows and ecosystems: Caddo Lake and its tributaries October 3, 2006 Jeff Opperman.](https://reader035.fdocuments.us/reader035/viewer/2022070305/551550aa550346c77d8b6577/html5/thumbnails/8.jpg)
ESWM Case Study: Lower Savannah River and Estuary
![Page 9: Ecologically Sustainable Water Management Defining the linkages between flows and ecosystems: Caddo Lake and its tributaries October 3, 2006 Jeff Opperman.](https://reader035.fdocuments.us/reader035/viewer/2022070305/551550aa550346c77d8b6577/html5/thumbnails/9.jpg)
![Page 10: Ecologically Sustainable Water Management Defining the linkages between flows and ecosystems: Caddo Lake and its tributaries October 3, 2006 Jeff Opperman.](https://reader035.fdocuments.us/reader035/viewer/2022070305/551550aa550346c77d8b6577/html5/thumbnails/10.jpg)
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Environmental Flow RecommendationsSavannah River
Low Flows
High FlowPulses
Floods
3,000 cfs; 3 successive years every 10-20 years• Floodplain tree recruitment
<5,000 cfs• Adequate floodplain drainage
• Create shallow water habitat for small-bodied fish
>8,000 cfs• Larval drift for pelagic spawners
50,000-70,000 cfs; 2 weeks, avg every 2 yrs• Maintain channel habitats
• Create floodplain topographic relief• Provide fish access to the floodplain
• control invasive species• Maintain wetlands and fill oxbows and sloughs
• Enhance nutrient cycling & improve water clarity• Disperse tree seeds
<13,000 cfs; 3 successive years, every 10-20 years• Floodplain tree recruitment
8,000-12,000 cfs;• Exchange water with oxbows
20,000-40,000 cfs; 2-3 days, 1/month• Provide predator-free habitat for birds
• Disperse tree seeds• Transport fish larvae
• Flush woody debris from floodplain to channel• Floodplain access for fish• Fish passage past NSBLD
>30,000 cfs; 5 pulses, >2 days with 2 eventsof 2 week duration (March and early April)
Key
Dry Year
Avg Year
Wet Year
Really?...Monitoring, Research,& Adaptive Management
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