HR: 1330h
AN: NB33T-01    [Abstracts]
TI: Storm Event and Multipoint Longitudinal Sampling with Biomonitored Responses to Turbidity in a NE Arkansas River
AU: * Walker, B L
EM: blwalker@astate.edu
AF: Department of Biological Sciences, Arkansas State University, PO Box 599, State University, AR 72467 United States
AU: Farris, J L
EM: jlfarris@astate.edu
AF: Department of Biological Sciences, Arkansas State University, PO Box 599, State University, AR 72467 United States
AU: Farris, J L
EM: jlfarris@astate.edu
AF: Environmental Sciences Program, Arkansas State University, PO Box 847, State University, AR 72467 United States
AU: Ashcraft, E A
EM: eashcraft@astate.edu
AF: Department of Biological Sciences, Arkansas State University, PO Box 599, State University, AR 72467 United States
AU: Nelson, M A
EM: manelson@uark.edu
AF: Arkansas Water Resource Center, University of Arkansas 700 Research Center Blvd., Fayetteville, AR 72701 United States
AB: A two part monitoring scheme consisting of both single point storm event sampling and multipoint longitudinal sampling was developed and implemented for the characterization of turbidity in the L'Anguille River in Northeast Arkansas. For the single point storm event monitoring, temperature, conductivity, turbidity and river stage near Palestine, Arkansas, have been continuously measured and recorded at fifteen minute intervals from September 2003 to present. Water samples were collected for the determination of total suspended solids and nutrient levels via an automated sampler following three storm events that caused significant increases in river stage. Grab samples were collected bimonthly for the estimation of background sediment and nutrient loads related to increased turbidity and suspended sediments following storm events. In addition to the intensive single point monitoring, the sampling of additional reaches has been included to characterize conditions along the entire river that differed notably in turbidity and nutrient loads between river segments (100% and 75% respectively). Toxicity testing on collected water (both background and storm) using Ceriodaphnia dubia and Pimephales promelas has shown no significant impairment, while impaired survival has been observed using Chironomus tentans in collected streambed sediments.
DE: 1815 Erosion and sedimentation
DE: 1845 Limnology
DE: 1860 Runoff and streamflow
DE: 1899 General or miscellaneous
DE: 9901 NABS Student Award - Basic Research
SC: North American Benthological Society [NB]
MN: 2005 Joint Assembly