Assessing Thermal Habitat Variability to Identify Refugia in SE Alaska Subsistence Salmon Watersheds

Salmonid Restoration Planning and Assessments

Salmonid Habitat Assessment / Inventory
Project IDAK53007
Recovery Domains -
Start Date03/01/2020
End Date11/30/2023
Last Edited04/18/2023
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Water temperature affects salmon growth, behavior, and survival across freshwater life stages. This project will assess the sensitivity of stream temperatures in Southeast Alaska to climate change by analyzing long-term water temperature data and by mapping the “thermal habitat” for salmon within several key subsistence watersheds. This project will also identify watersheds that are expected to remain productive into the future and important thermal refugia within watersheds that should be protected.

Project Benefit    

Understanding current and future thermal conditions in Southeast Alaska’s salmon streams is critical for making informed decisions about which watersheds are likely to continue to be (or may become increasingly) suitable for salmon productivity and should therefore be the focus of future restoration and protection actions. This project will produce a regionally-relevant assessment that provides insights into the types of watersheds likely to be resilient (or resistant) to climate change with respect to water temperatures, and will identify specific locations within eight salmon watersheds (833 km2), including four important subsistence watersheds (582 km2), that may provide thermal refugia and should be considered priorities for restoration and/or protection actions.


Metric Completed Originally
Planning and Assessment
  Stream Miles Assessed 86.10

Funding Details

Report Total:$127,219

Project Map



  • Worksite Identifier: 46843896
  • Start Date:
  • End Date:
Area Description

No Area Description data was found for this worksite.

Location Information

  • Basin: Central Southeast Alaska
  • Subbasin:
  • Watershed:
  • Subwatershed:
  • State: Alaska
  • Recovery Domain:
  • Latitude: 58.002
  • Longitude: -135.905


  • Un-Named ESU Chinook
  • Un-Named ESU Chum
  • Un-Named ESU Coho
  • Un-Named ESU Pink
  • Un-Named ESU Sockeye




  • B.0 Salmonid Restoration Planning and AssessmentsY (Y/N)
    •      . . B.0.a Planning And Assessment Funding .00
    •      . . B.0.b.1 Area Encompassed
    •      . . B.2 Salmonid Habitat Assessment / InventoryY (Y/N)
      •      . . . . B.2.a Habitat Assessment Funding
      •      . . . . B.2.b.1 Watershed AssessmentY (Y/N)
      •      . . . . B.2.c Instream SurveyY (Y/N)
        •      . . . . . . B.2.c.1 Type of instream survey (LOV)
        •      . . . . . . B.2.c.2 Stream miles assessed