Effects of transient storage on fine particle transport and nutrient uptake in streams.

The purpose of the study is to use very small-scale manipulations of in-stream physical complexity to see if resultant changes in flow affect fine particle retention and nutrient uptake.1. I will release a chloride tracer (NaCl) along with trace amounts of P as KH2PO4, N as NH4CL, and brewers yeast , stained with a non-toxic flourescent dye preserved with negligible amounts of formalin. One release is made in the stream reach. Then the 50m of reach will be slightly altered by adding blocks or bags filled with rocks to channelize flow and reduce the complexity of flow (i.e. make the stream temporarily more flume-like). After 24 hours, a second release will be made to test the effects of reducing the complexity of flow. After the second release, all materials will be removed and the channel restored as close as possible to pre-treatment