NSF Org:	EAR Division Of Earth Sciences
Recipient:	TRUSTEES OF DARTMOUTH COLLEGE
Initial Amendment Date:	December 16, 2004
Latest Amendment Date:	March 13, 2006
Award Number:	0439688
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:	December 31, 2007 (Estimated)
Total Intended Award Amount:	$211,162.00
Total Awarded Amount to Date:	$211,162.00
Funds Obligated to Date:	FY 2005 = $112,093.00 FY 2006 = $99,069.00
History of Investigator:	William Dade (Principal Investigator) William.B.Dade@Dartmouth.edu Carl Renshaw (Co-Principal Investigator)
Recipient Sponsored Research Office:	Dartmouth College 7 LEBANON ST HANOVER NH  US  03755-2170 (603)646-3007
Sponsor Congressional District:	02
Primary Place of Performance:	Dartmouth College 7 LEBANON ST HANOVER NH  US  03755-2170
Primary Place of Performance Congressional District:	02
Unique Entity Identifier (UEI):	EB8ASJBCFER9
Parent UEI:	T4MWFG59C6R3
NSF Program(s):	Hydrologic Sciences
Primary Program Source:	app-0105  app-0106
Program Reference Code(s):	0000, 9189, EGCH
Program Element Code(s):	157900
Award Agency Code:	4900
Fund Agency Code:	4900
Assistance Listing Number(s):	47.050

ABSTRACT

This project will investigate the rates at which fine particles are delivered to, and penetrate into, streambeds. Fine-particle deposition affects streambed permeability, and thus directly impacts such processes as the sequestration of sediment and contaminants in fluvial environments, microbially-constrained aspects of geochemical cycles and larval recruitment at the sediment-water interface. A detailed understanding of fine-particle deposition will (i) improve boundary conditions for regional models of sediment and contaminant transport and fate, and (ii) improve understanding of physical factors that constrain benthic biogeochemical processes and related benthic biocomplexity. The PIs propose to determine the degree to which weak bedload transport of a coarse granular bed affects rates of deposition of silt-sized particles from dilute, turbulent suspension. The proposed research will be conducted in a new flume now under construction with expected completion by Summer 2004.

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