Notes
Slide Show
Outline
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Protected Instream Flow Studies and
Water Management Plan
for the Souhegan River Designated Reach
  • University of New Hampshire
  • University of Massachusetts
  • Normandeau Associates, Inc.
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Project Team
  • University of New Hampshire
  • Hydrology, hydraulics, geomorph- ology, ground water, water resources management, economics, financial possibilities, management plan
  • University of Massachusetts
  • Instream flow, habitat modeling, fish ecology, fisheries management, field methods
  • Normandeau Associates
  • limnology, aquatic ecology, aquatic ecosystem restoration, impact assessment, permitting, natural resource damage assessment , field methods


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IPUOCR Entities and Proposed PISF Methods
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Instream Public Uses, Outstanding Characteristics, and Resources (IPUOCR)
  • Navigation
  • Recreation
  • Fishing
  • Storage
  • Conservation/Open Space
  • Maintenance and Enhancement of Aquatic and Fish Life
  • Fish and Wildlife Habitat
  • Rare, Threatened or Endangered (RTE)
  • Water Quality Protection/Public Health
  • Public Water Supply
  • Pollution Abatement
  • Aesthetic Beauty/Scenic
  • Hydroelectric Energy Production
  • Cultural
  • Historical or Archaeological
  • Community Significance
  • Hydrological/Geological
  • Agricultural


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Protected Instream Flows (PISF)
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Reason Why We Are Here Today
  • The consultant will produce a draft report describing the results of the IPUOCR entities research and on-stream survey, and proposing PISF methods to be used to assess their flow needs.
  • The draft report will be submitted to the committees for review and comment.
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Please submit comments to:
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IPUOCR SURVEY
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IPUOCR Flow Dependence
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Flow dependent resources
  • Recreation
  • Hydroelectric Energy
  • Pollution Abatement


  • Fowlers Toad
  • Pied Billed Grebe
  • Wood Turtle
  • Osprey
  • Common Loon
  • Long’s Bitter Cress
  • Wild Garlic



  • Emergent Wetlands
  • Southern New England High Energy Riverbank
  • Southern New England Floodplain Forest


  • Fish and Fish Habitat
  • Mussels
  • Insects
  • T/E Banded Sunfish


  • Public Water Supply


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Recreation
  • IPUOCR is kayaking and canoeing
  • Flow dependent at average to high flows
  • Not navigable at low flow
  • Evaluated during water management plan
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Hydroelectric Energy
  • 7 hydroelectric plants on designated reach
  • Low flow generation capacity unknown
  • Dam owner interviews to determine flow needs


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Pollution Abatement
  • 5 permitted discharges
  • 2 hazardous waste sites
  • Permits, waste load allocation studies and remediation reports reviewed
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Flow dependent resources
  • Recreation
  • Hydroelectric Energy
  • Pollution Abatement


  • Fowlers Toad
  • Pied Billed Grebe
  • Wood Turtle
  • Osprey
  • Common Loon
  • Long’s Bitter Cress
  • Wild Garlic



  • Emergent Wetlands
  • Southern New England High Energy Riverbank
  • Southern New England Floodplain Forest


  • Fish and Fish Habitat
  • Mussels
  • Insects
  • T/E Banded Sunfish


  • Public Water Supply


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Fowler’s Toad, Pied Billed Grebe, Common Loon, Long’s Bitter Cress, Wild Garlic
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Wood Turtle
  • Wood turtle habitat in central section of designated reach
  • Critical period is over winter dewatering
  • Habitat to be  evaluated during emergent wetland survey
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Emergent Wetland
  • Bordering wetlands along designated reach and in oxbows
  • Will be evaluated by transect surveys at representative locations and multiple flows
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Southern New England High Energy Riverbank
  • Present along much of upper portions of designated reach
  • Assessed through transect surveys
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Southern New England Floodplain Forest
  • Found in locations throughout designated reach
  • Assessed through transect surveys
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Flow dependent resources
  • Recreation
  • Hydroelectric Energy
  • Pollution Abatement


  • Fowlers Toad
  • Pied Billed Grebe
  • Wood Turtle
  • Osprey
  • Common Loon
  • Long’s Bitter Cress
  • Wild Garlic



  • Emergent Wetlands
  • Southern New England High Energy Riverbank
  • Southern New England Floodplain Forest


  • Fish and Fish Habitat
  • Mussels
  • Insects
  • T/E Banded Sunfish


  • Public Water Supply


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Flow dependent resources
  • Recreation
  • Hydroelectric Energy
  • Pollution Abatement


  • Fowlers Toad
  • Pied Billed Grebe
  • Wood Turtle
  • Osprey
  • Common Loon
  • Long’s Bitter Cress
  • Wild Garlic



  • Emergent Wetlands
  • Southern New England High Energy Riverbank
  • Southern New England Floodplain Forest


  • Fish and Fish Habitat
  • Mussels
  • Insects
  • T/E Banded Sunfish


  • Public Water Supply


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Public Water Supply
  • Pennichuck Water Works utilizes two wells in proximity to the river
  • Hydrogeologic investigation to determine flow dependence
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Assessment of Well Withdrawal Impacts on Surface Water
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Ambient Groundwater Hydraulics
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Effect of Relatively Small Quantities of Groundwater Withdrawals
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Effect of Increasing the Quantity of Groundwater Withdrawals
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Effect of Groundwater Pumping Even When Well is Physically Above the River
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Induced Recharge
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Stagnation Point
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Short Term Groundwater Management
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Methodology for Well Pumping
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Groundwater ISF Strategy
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Aquifer Thickness and Transmissivity
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Aquifer Piezometric Map
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Recommended Groundwater
ISF Methods
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Field Measurements - Office
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Field Measurements – Miniature Piezometers
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Please submit comments to: