Use of Large-Scale Particle Image Velocimetry (LSPIV) for Continuous Streamflow Gaging During Flood Events

ENGEL, F.; PATALANO, A.; GARCÍA, C. M.

Durham

Conferencia; Hydraulic Measurements & Experimental Methods Conference; 2017

An analysis from a test Large Scale Particle Image Velocimetry (LSPIV) streamgage deployment, co-located at a U.S. Geological Survey (USGS) stage-discharge streamgaging station in a small, flashy urban stream in Urbana, Illinois, USA (Boneyard Creek at Urbana, IL, 03337000) is presented here. Acoustic Doppler velocity meter (ADVM) measurements of flow velocity profiles were collected concurrently with surface velocity video samples, measured water depths, and rated discharges. Results indicate that the relation between surface velocity and mean channel velocity varies with flow depth and the submergence of existing hydraulic controls. Using these results, continuous discharge for flood flows derived from surface velocity videos is computed and compared to the discharge derived from the stage-discharge rating curve. These findings are informing the development of preliminary guidance for the USGS on the use and deployment of continuous LSPIV streamgaging.