the design for the wetland restoration of a freshwater
TRANSCRIPT
![Page 1: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/1.jpg)
The Design for the Wetland
Restoration of a Freshwater
Cranberry Bog in New
England
Lee Weishar, Ph.D.; PWS
![Page 2: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/2.jpg)
Points for Discussion
• History of the wetland (cranberry bog)
• Challenges for restoration
• Design alternatives
• Recommendations
• Status of Project
• Conclusions
![Page 3: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/3.jpg)
![Page 4: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/4.jpg)
![Page 5: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/5.jpg)
1890’s 1940’s 1990’s
![Page 6: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/6.jpg)
Site Demographics
• Quashnet River cranberry bog
– Subdivided into 6 units (K1 – K6)
– The entire site is approximately 24 hectares (60 acres)
– The restoration plan called for restoring ~10 hectares (25 acres)
– Natural wetland considerations • Quashnet River
• Johns Pond Outlet
• Cold groundwater seeps
![Page 7: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/7.jpg)
Challenges for the Restoration
Design
• Active Cranberry Bog
• Contaminated groundwater
• Active herring run (Alewives)
• Active trout spawning area
• Objectives
– Restore/improve trout spawning
– Maintain herring run
– Maintain cranberry production
![Page 8: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/8.jpg)
![Page 9: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/9.jpg)
Challenges for the Restoration
Design
• Active Cranberry Bog
• Contaminated groundwater
• Active herring run (Alewives)
• Active trout spawning area
• Objectives
– Restore/improve trout spawning
– Maintain herring run
– Maintain cranberry production
![Page 10: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/10.jpg)
![Page 11: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/11.jpg)
![Page 12: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/12.jpg)
![Page 13: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/13.jpg)
![Page 14: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/14.jpg)
Challenges for the Restoration
Design
• Active Cranberry Bog
• Contaminated groundwater
• Active herring run (Alewives)
• Active trout spawning area
• Objectives
– Restore/improve trout spawning
– Maintain herring run
– Maintain cranberry production
![Page 15: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/15.jpg)
Restoration Site
![Page 16: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/16.jpg)
![Page 17: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/17.jpg)
![Page 18: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/18.jpg)
![Page 19: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/19.jpg)
Challenges for the Restoration
Design
• Active Cranberry Bog
• Contaminated groundwater
• Active herring run (Alewives)
• Active trout spawning area
• Objectives
– Restore/improve trout spawning
– Maintain herring run
– Maintain cranberry production
![Page 20: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/20.jpg)
![Page 21: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/21.jpg)
![Page 22: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/22.jpg)
Challenges for the Restoration
Design
• Active Cranberry Bog
• Contaminated groundwater
• Active herring run (Alewives)
• Active trout spawning area
• Objectives
– Restore/improve trout spawning
– Maintain herring run
– Maintain cranberry production
![Page 23: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/23.jpg)
Restoration Approach
• Channel designs were modeled with
HEC-RAS
• Three channel modifications were
evaluated
– Evaluate exiting conditions –pumping & no
pumping
– Partial channel realignment
– Full channel realignment
![Page 24: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/24.jpg)
Low Flow, Low DO
![Page 25: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/25.jpg)
Restoration Alternatives
• Channel designs were modeled with
HEC-RAS
• Three channel modifications were
evaluated
– Evaluate exiting conditions – pumping &no
pumping
– Partial channel realignment
– Full channel realignment
![Page 26: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/26.jpg)
Leave this channel intact
Realign channel
![Page 27: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/27.jpg)
Restoration Alternatives
• Channel designs were modeled with
HEC-RAS
• Three channel modifications were
evaluated
– Evaluate exiting conditions – pumping &no
pumping
– Partial channel realignment
– Full channel realignment
![Page 28: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/28.jpg)
Realign channels
Abandon channel
![Page 29: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/29.jpg)
Existing Conditions Design 3
![Page 30: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/30.jpg)
![Page 31: The Design for the Wetland Restoration of a Freshwater](https://reader031.vdocument.in/reader031/viewer/2022013009/61ce953eed302026e751fde8/html5/thumbnails/31.jpg)
Conclusions
• The site is highly altered
– Cranberry farming activities
– Extensive groundwater pumping
• Feasibility study shows that restoration
is possible
– Improve trout spawning habitat
– Maintain cranberry production
– Maintain herring run