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Title:	Walker Branch Watershed Stream Discharge and Annual Runoff
Project(s):	Long-term Monitoring at Walker Branch Watershed
Investigator(s):	Mulholland, P.J.mulhollandpj@ornl.gov
Status:	Final
Access Restrictions:	Public
Data Set Location:	Environmental Sciences Division, Oak Ridge National Laboratory
Data Center Contact:	Mulholland, P.J. - mulhollandpj@ornl.gov Phone: 865-574-7304
Data Center URL:	http://walkerbranch.ornl.gov/
Data Set Citation:	Mulholland, P.J. 2005. Walker Branch Watershed Stream Discharge and Annual Runoff. Data set. Available on-line [http://mercury.ornl.gov/EDORA/] from Environmental Data for the Oak Ridge Area, Oak Ridge, Tennessee, U.S.A.
Download Data Sets:	Walker Branch Watershed Stream Discharge Data for 2002 - 15 minute Walker Branch Watershed Stream Discharge Data for 2001 - 15 minute Walker Branch Watershed Stream Discharge Data for 2000 - 15 minute Walker Branch Watershed Stream Discharge Data for 1999 - 15 minute Walker Branch Watershed Stream Discharge Data - Daily (1982 - 2005) Walker Branch Watershed Stream Discharge Data - Annual (1969 - 2005) Walker Branch Watershed Stream Discharge Data for 2003 - 15 minute The Walker Branch Watershed data provided on this site are freely available and were furnished by ORNL scientists who encourage their use. Please kindly inform the Data Center Contact of any publication plans. Please acknowledge the data source as a citation or in the acknowledgments as given in the Data Set Citation.
Parameter Description:	Parameter Sensor Source Term Topic DISCHARGE/FLOW STREAM GAUGE STREAMFLOW STATION SURFACE WATER HYDROSPHERE STAGE HEIGHT STREAM GAUGE STREAMFLOW STATION SURFACE WATER HYDROSPHERE
Keywords:	Walker Branch Watershed
Abstract:	The long-term Walker Branch Hydrology Monitoring project is intended to document changes in the water balance (precipitation inputs, stream discharge outputs) for the Walker Branch Watershed over time.This data set contains annual runoff records (annual discharge divided by subcatchment area) for 1969 through 2005, daily stream discharge records for 1982 through 2005, and 15-minute stream discharge records for 1999 through 2005.Spatial Extent: West Fork subcatchment = 38.4 ha East Fork subcatchment = 59.1 ha Entire watershed = 97.5 haGIS data set information - See Walker Branch Watershed Project website: http://walkerbranch.ornl.gov/Parameters measured and methods: The streams draining each of the two subcatchments of Walker Branch (East and West Forks) are monitored for discharge with 120-degree V-notch weirs. Discharge up to 1.18 m3/s can be measured with the V-notch weirs, and higher discharges up to 1.86 m3/s are monitored with a sharp-crested, rectangular cross section above the V-notch weir. The stream stage heights were monitored with a Fisher and Porter model 1542 punched-tape water-level recorder at 5-minute (until 1989) or 15-minute intervals with a resolution of 0.3 mm. Beginning in 1999 stream stage heights were monitored electronically with a Stevens Type A/F encoder at 15-min intervals. The conversion of stage height to discharge for stage heights <2.5 feet is calculated by means of a regression equation as follows: Discharge (L/s) = 125.37 x (stage height in feet)**2.449The measurement uncertainty is ±5% at low flows (<0.004 m3/s) and ±0.5% at flows > 0.125 m3/s. Flows seldom exceed 0.7 m3/s. Publications:Curlin, J. W., and D. J. Nelson. 1968. Walker Branch Watershed project: Objectives, facilities, and ecological characteristics. ORNL/TM-2271. Oak Ridge National Laboratory, Oak Ridge, TN.Luxmoore, R. J. 1983. Water budget of an eastern deciduous forest stand. Soil Science Society of America Journal 47:785-791.Luxmoore, R. J., and D. D. Huff. 1989. Water. Chapter 5, pages 164-196. In : D. W. Johnson and R. I. Van Hook, eds., Analysis of Biogeochemical Cycling Processes in Walker Branch Watershed. Springer-Verlag, New York.Research on Walker Branch Watershed is funded by the U.S. Department of Energy, Office of Biological and Environmental Research.
Site Information:	Site North West South East Walker Branch, Tennessee, USA 35.90 -84.3 35.90 -84.3
Spatial Reference Method:	Point
Content Time Range:	Begin: 19690101 - End: 20051231
Metadata Author:	Name: Mulholland, P.J. Email: mulhollandpj@ornl.gov Phone: 865-574-7304
Additional Documentation:	Walker Branch Watershed Web Site
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