
NSF Org: |
EAR Division Of Earth Sciences |
Recipient: |
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Initial Amendment Date: | January 10, 2005 |
Latest Amendment Date: | January 9, 2008 |
Award Number: | 0439037 |
Award Instrument: | Continuing Grant |
Program Manager: |
L. Douglas James
EAR Division Of Earth Sciences GEO Directorate for Geosciences |
Start Date: | January 1, 2005 |
End Date: | March 31, 2008 (Estimated) |
Total Intended Award Amount: | $0.00 |
Total Awarded Amount to Date: | $314,535.00 |
Funds Obligated to Date: |
FY 2006 = $119,504.00 FY 2007 = $22,318.00 |
History of Investigator: |
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Recipient Sponsored Research Office: |
77 MASSACHUSETTS AVE CAMBRIDGE MA US 02139-4301 (617)253-1000 |
Sponsor Congressional District: |
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Primary Place of Performance: |
77 MASSACHUSETTS AVE CAMBRIDGE MA US 02139-4301 |
Primary Place of
Performance Congressional District: |
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Unique Entity Identifier (UEI): |
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Parent UEI: |
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NSF Program(s): |
Hydrologic Sciences, Geomorphology & Land-use Dynam |
Primary Program Source: |
app-0106 app-0107 |
Program Reference Code(s): |
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Program Element Code(s): |
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Award Agency Code: | 4900 |
Fund Agency Code: | 4900 |
Assistance Listing Number(s): | 47.050 |
ABSTRACT
At orogen scale, rock uplift rates are strongly influenced by erosional efficiency, which is set by climatic conditions, bedrock quality, and the sediment load carried by rivers. And, river incision rates ultimately control regional denudation rates and patterns because rivers set the boundary condition for hillslope erosion. This project will develop and test process-specific models of river incision into bedrock. In particular, the quantitative relationships among bedrock properties, river sediment load (flux, size, sorting), flow hydrodynamics, and bed morphology remain important unknowns and support the conceptual framework that erosion rates depend on evolving feedbacks among bed topography, fluid flow, and sediment transport. A refined, physically reasonable, quantitative model of bedrock incision into bedrock will be developed to rationally interpret specific erosional morphologies observed in the field in terms of flow and sediment transport conditions. Preliminary experiments have been conducted in (SAFL, UMn) and a new flume to be constructed at MIT.
PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH
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