SS3.05 Land-use, Groundwater and Lotic Ecosystems
Date: Monday, June 10, 2002
Time: 11:45:00 AM
Location: Colwood
 
McKayAW, Desert Research Institute, Reno,NV, USA, alan@dri.edu
Peterson, S, E, University of Nevada Reno, Reno,NV, USA, sarpeter@yahoo.com
Brock, J, T, Desert Research Institute, Reno,NV, USA, jbrock@dri.edu
Warwick, J, J, University of Florida, Gainesville,FL, USA, warwick@ufl.edu
Fritsen, C, H, Desert Research Institute, Reno, NV, USA, cfritsen@dri.edu
 
PATTERNS OF PERIPHYTON GROWTH IN THE TRUCKEE RIVER AND THE LINK BETWEEN AGRICULTURAL GROUND WATER NUTRIENT SUPPLY AND LAST CENTURIES LAND RECOVERY STRATEGIES
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Historical management of the Truckee River in western Nevada includes substantial withdrawals for the irrigation of desert lands for agricultural purposes. Synoptic surveys of the lower Truckee River system suggest that the returning portion of this water via ground water during low flow conditions substantially increases the total dissolved solids within the water column. Recent surveys also show local maxima in periphyton corresponding to the gaining reaches within the system. Analysis of the dissolved constituents in ground water, estimates of ground water fluxes, periphyton nutrient budgets, and ecosystem metabolism is allowing better constraints to the link between decadal time scale land use legislation and the dynamics of lotic ecosystems.