Campbell John US Forest Service

271 Mast Rd. Durham NH 03824 USA

(603)-868-7643 Hubbard Brook Experimental Forest LTER

U.S. Forest Service 271 Mast Rd. Durham NH 03824 USA

603-868-7643 603-868-7604 http://www.hubbardbrook.org Amey Bailey associated researcher stream watershed weir gage gauge discharge flow

Publications using these data from the Hubbard Brook Ecosystem Study must include the following paragraph: Some data used in this publication were obtained by scientists of the Hubbard Brook Ecosystem Study; this publication has not been reviewed by those scientists. The Hubbard Brook Experimental Forest is operated and maintained by the Northeastern Research Station, U.S. Department of Agriculture, Newtown Square, Pennsylvania. Please note that data sharing and availability policy varies among the datasets available. Publishers of Hubbard Brook data are encouraged to contact the original data provider to obtain information for an acknowledgement of the original funding source of the research.

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http://www.hubbardbrook.org/data/dataset.php?id=1 Weir 1 -71.726501 -71.726501 43.952034 43.952034 Weir 2 -71.724174 -71.724174 43.953358 43.953358 Weir 3 -71.722816 -71.722816 43.954872 43.954872 Weir 4 -71.725792 -71.725792 43.950176 43.950176 Weir 5 -71.731918 -71.731918 43.948845 43.948845 Weir 6 -71.735641 -71.735641 43.949940 43.949940 Weir 7 -71.767075 -71.767075 43.927509 43.927509 Weir 8 -71.759521 -71.759521 43.929436 43.929436 Weir 9 -71.747185 -71.747185 43.926014 43.926014 Mon Year Jan 1956 Ongoing Ongoing John Campbell

PO Box 640 Durham NH 03824 USA

(603)-868-7643 jlcampbell@fs.fed.us

All gages are on first or second order tributaries of Hubbard Brook. Watersheds 1 through 6 are adjacent south-facing watersheds ordered from west to east as 6, 5, 4, 1, 2, 3. Watersheds 7, 8 and 9 are adjacent north-facing watersheds.

Continuous streamflow is measured at 9 stream gaging stations, at the foot of Watersheds 1 through 9. Each gage consists of a 90 degree or a 120 degree sharp-crested V-notch weir. Gages 5 through 8 have a San Dimas Flume in series with the V-notch weir. Water level in the V-notch stilling basin is recorded continuously on Stevens A-35 streamflow recorders. Water level in the flumes is recorded, when it is high enough, by Belfort FW-1 recorders. During winter, plywood hoods are placed over the V-notches and propane gas heaters keep V-notches, flumes, and wells ice-free. The analog A-35 charts are digitized at Hubbard Brook using a Summagraphics digitizer. Time intervals are arbitrarily selected by the operator, with a minimum of four per day. When flow is higher than the V-notches, an estimated equivalent V-notch gage height is made, either from the gage height in the weir rectangular section, or from the flume record, or by comparison with other gages. This value is then entered via the digitizer menu. Gage heights for V-notch weirs and flumes are converted to volume of dishcarge using standard, published equations. V-notches have been manually calibrated for gage heights < 0.2 ft. (60 mm). The time discharge pairs are converted to streamflow rate at each digitized time.

J.W. Hornbeck C.W. Martin C. Eagar 1997 english

Can. J. For. Res. 27 2043-2052

hornbeck R.S. Pierce C.A. Federer 1970

Water Resour. Res. 6 4 1124-1132

G.E. Likens F.H. Bormann pierce J.S. Eaton N.M. Johnson 1977 Springer-Verlag New York Inc. 146 pp. K.G. Reinhart pierce 1964 USDA Forest Service Handbook 268 37 pp. uid=HBR,o=lter,dc=ecoinformatics,dc=org all public read so_all Instantaneous Streamflow data for Hubbard Brook lter. In file names, # is watershed number, year is year of the data collection. so_all.txt ASCII 1 \r\n column 0x2c http://www.hubbardbrook.org/data/dataset.php?id=1

The data was last updated March 10, 2003 and is physically located at USDA Forest Service, Durham, NH. Notes: WS 2 from 1958 through 1963 has been recalculated from punched cards and differs somewhat from older printed output. WS 7 data are missing for 4/14/65 - 4/30/65. The recorder chart is lost. This data has not been estimated.

WS Watershed number Numbers 1-9 representing the watershed numbers MO Month MM 1 DA Day DD 1 YR Year YY 1 TIME Time of day, in military units hhmm 1 GAGE FT. Gage height foot .001 real GAGE CM. Gage height centimeter .001 real DISCH C.F.S. Discharge (cubicFeetPerSecond) cubicFeetPerSecond .0001 real DISCH L/S. Discharge (litersPerSecond) litersPerSecond .0001 real INTERV. INCH Interval inch .00001 real ACCUM. INCH (DAILY) Accumulative daily discharge inch .00001 real INTERV. MM Interval millimeter .00001 real ACCUM. MM (DAILY) Accumulative daily discharge millimeter .00001 real