Skip to Main Content
Flow velocity and the hydrologic behavior of streams during baseflow.Author(s): Steven M. Wondzell; Michael N. Gooseff; Brian L. McGlynn
Source: Geophysical Research Letters. 34(L24404): 5 p.
Publication Series: Scientific Journal (JRNL)
Download Publication (806 KB)
DescriptionDiel variations in stream discharge have long been recognized, but are relatively little studied. Here we demonstrate that these diel fluctuations can be used to investigate both streamflow generation and network routing. We treat evapo-transpiration (ET) as a distributed impulse function in an advection model and analyze the effect of ET on diel fluctuations in discharge. We show that flow velocity is high during high baseflow, discharge fluctuations tend to be in phase, and constructive interference reinforces ET-generated signals resulting in strong diel fluctuations measured at a gauging station at the mouth of the watershed. As flow velocity slows with baseflow recession, ET-generated signals are increasingly out of phase so that fluctuations in discharge are masked by destructive interference. These results demonstrate that naturally produced fluctuations in discharge constitute discrete impulse functions that can be used to analyze ecohydrologic behavior of whole watersheds during baseflow periods.
- Visit PNW's Publication Request Page to request a hard copy of this publication.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationWondzell, Steven M.; Gooseff, Michael N.; McGlynn, Brian L. 2007. Flow velocity and the hydrologic behavior of streams during baseflow. Geophysical Research Letters. 34(L24404): 5
- Flow velocity and the hydrologic behavior of streams during baseflow.
- An analysis of alternative conceptual models relating hyporheic exchange flow to diel fluctuations in discharge during baseflow recession
- Catchment scale controls the temporal connection of transpiration and diel fluctuations in streamflow
XML: View XML