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Title: influence of wind and lake morphometry on the interaction between two rivers entering a stratified lake Authored by: Morillo, S., Imberger, J., Antenucci, J.P. and Woods, P. Abstract:
The interaction of two rivers flowing into a lake is documented using a field investigation and 3D numerical simulations; the focus is on the impact of basin morphology, wind speed, and wind direction on the mixing of two rivers within the lake. Data from a (12-day) field campaign in Coeur d'Alene Lake (USA) showed that the intrusions, from the two main rivers, propagated into the lake at different depths, with the trace element-polluted Coeur d'Alene River flowing into the lake above the trace element poor St. Joe River. The two river inflows initially spread horizontally with little interaction. In addition, model results revealed that as the intrusions enter the broader lake basin, basin-scale internal wave motions interact with the intrusions to syphon them into the lake proper and then rapidly mix them vertically. Coeur d'Alene Lake's biological productivity is moderated by the toxic impact of the trace elements in the Coeur d'Alene River water; without this inhibition the nutrients introduced to the lake by the two rivers could potentially sustain a considerable algal biomass.
Reference: Morillo, S., Imberger, J., Antenucci, J.P. and Woods, P., 2008, influence of wind and lake morphometry on the interaction between two rivers entering a stratified lake, 134(11):1579-1589 Keywords: Inflow, ELCOM, intrusions |
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