Your query was:

"H21B-1001"

HR: 0800h
AN: H21B-1001
TI: Stream Transient Storage as a Function of Land Use in Jackson Hole, Wyoming.
AU: * Gooseff, M N
EM: michael.gooseff@usu.edu
AF: Colorado School of Mines, Dept of Geology and Geologic Engineering 1516 Illinois Street, Golden, CO 80401 United States
AU: Hall, R O
EM: bhall@uwyo.edu
AF: University of Wyoming, Department of Zoology and Physiology, Laramie, WY 82071 United States
AU: Tank, J L
EM: tank.1@nd.edu
AF: University of Notre Dame,, Department of Biological Sciences, Notre Dame, IN 46556 United States
AB: Stream fluvial geomorphic structure establishes patterns of surface water and subsurface head distributions, often driving hyporheic exchange through steps, riffles, and meanders. We performed conservative tracer experiments and geomorphological assessments (topographic thalweg surveys, channel width, and sediment size analyses) in six streams: two agricultural streams, two urban streams, and two reference streams surrounded by native vegetation, in Jackson Hole WY, to investigate stream water residence time distributions in relation to land use. Urban stream channels were the least complex, with very little variation in streambed elevation and narrow channel widths. Agricultural streams were moderately complex, with the widest channels on average, compared to pristine stream channels which contained more riffles, pools, steps and splits. Consequently, relative to advection ({\it t$_{adv}$}), transient storage processes increased with increasing channel complexity. Urban channels had total relative residence times of 2-5 {\it t$_{adv}$}, agricultural streams 6-7 {\it t$_{adv}$}, and pristine streams had the longest relative residence times, 13-20{\it t$_{adv}$}. We suggest that human land use simplifies fluvial geomorphic structure directly lowering stream transient storage, which may also alter the potential for biogeochemical processing.
DE: 1800 HYDROLOGY
DE: 1829 Groundwater hydrology
DE: 1832 Groundwater transport
DE: 1860 Runoff and streamflow
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting