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Award Detail

Doing Business As Name:Yukon River Inter-Tribal Watershed Council
  • Edda Mutter
  • (907) 351-6265
Award Date:04/07/2021
Estimated Total Award Amount: $ 38,101
Funds Obligated to Date: $ 38,101
  • FY 2021=$38,101
Start Date:04/01/2021
End Date:03/31/2024
Transaction Type:Grant
Awarding Agency Code:4900
Funding Agency Code:4900
CFDA Number:47.050
Primary Program Source:040100 NSF RESEARCH & RELATED ACTIVIT
Award Title or Description:Collaborative Research: Predicting riverbank erosion in thawing permafrost
Federal Award ID Number:2031261
DUNS ID:142008874
Parent DUNS ID:142008874
Program:Geomorphology & Land-use Dynam
Program Officer:
  • Justin Lawrence
  • (703) 292-2425

Awardee Location

Street:725 Christensen Drive
Awardee Cong. District:00

Primary Place of Performance

Organization Name:Yukon River Inter Tribal Watershed Council
Street:725 Christensen Drive, Suite 3
Cong. District:00

Abstract at Time of Award

Most Arctic floodplains have permanently frozen subsoil, or permafrost, that keeps the land intact and habitable along coasts and riverbanks. However, permafrost thaw can lead to widespread destabilization of the land and enhanced riverbank erosion. This erosion threatens critical infrastructure that is vital to national prosperity and security, and has led to the displacement of entire Alaskan communities. The main objective of this proposal is to develop and test a mathematical theory for riverbank erosion in permafrost. The theory will be tested using novel indoor permafrost-river experiments at the Caltech Earth Surface Dynamics Laboratory, and through measurements along the Koyukuk River, AK, in collaboration with the Native Alaskan community of Huslia. The work promises to fill a gap in our basic understanding of how river systems respond to global warming. In addition, it will contribute to climate-change adaptation planning for riverside communities in the Yukon River watershed. The next generation of scientists will be trained at the undergraduate and PhD levels in integrated hazard assessment by bringing together community engagement and basic and applied science to address an environmental crisis with both local and global implications. The main objective of this proposal is to develop and test a thermo-mechanical model for river-bank erosion in permafrost. In addition to seeking to understand the basic mechanics of bank erosion in cold environments, the model will be used to quantitatively assess how bank erosion rates will respond to climate change. The model will be tested against flume experiments specially designed to span the range of permafrost river characteristics and to test hypotheses related to river flow velocity, river water temperature, and bank sediment grain size. Measurements of hydraulic, mechanical and thermal properties of cutbanks along the Koyukuk River, Alaska, will be used to evaluate the model for entrainment- and ablation-limited regimes. This project was jointly funded by the Geomorphology and Land-use Dynamics and Arctic Natural Sciences Programs. This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

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