Acceptance and utilization of PIE-LTER data requires that:
· The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.
· The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.
· A copy of any resultant publications should be sent to:
(Principal Investigator)
Ecosystems Center;
Marine Biological Laboratory
Woods Hole, MA 02543
PLUM ISLAND ECOSYSTEM LTER DATABASE
DATA FILE: WAT-YSI_FishBr_2001.txt
DOCUMENTATION FILE: WAT-YSI_FishBr_2001.doc
YEAR: 2001
PI: Charles Vorosmarty
OTHERS: Wilfred Wollheim, Brian Pellerin
BRIEF DESCRIPTION OF DATA FILE: Continuous measurements, every 15 minutes, were made of stage, water temperature, conductivity, dissolved oxygen, and pH in a small headwater stream draining a moderate sized, mixed land use watershed. Measurements are for part of the ice free season (June – December). Discharge could not be determined due to inadequate rating curve. Several day gaps occur periodically due to removal for recalibration.
KEYWORDS: water temperature, conductivity, pH, dissolved oxygen.
SITE TYPE: Watershed draining through Fish Brook.
RESEARCH LOCATION: Locations are in Massachusetts State Plane coordinates. The site is located on Fish Brook just upstream of Middleton Rd. in Boxford (~31 km2 drainage area). The contributing area includes mainly forest and no public water withdrawals.
STATION STATE X STATE Y
YSI-FB 240600 934310
EXPERIMENTAL DESIGN AND METHODS:
YSI 6200 data sondes were deployed vertically in a pool deep
enough to contain water during dry conditions.
The sonde was deployed in a PVC tube, which was attached to ree-bar
driven into the stream bed. The PVC
tube had holes drilled to allow adequate water circulation. Dissolved oxygen measurements are of good
quality because detritus did not accumulate in the bottom of the pool (unlike
our suburban site). The PVC tube was
surveyed upon original deployment in 2001 and resurveyed in 2002 to ensure that
elevation did not change during winter ice period. No change was detected. Recalibration was performed roughly every
4-6 weeks. Instrument drift during
deployment periods was not significant.
NOTES AND COMMENTS:
Discharge could not be determined due to inadequate rating curve.
Dissolved oxygen concentrations reflect water column levels.
NA refers to data not available.
VARIABLE DESCRIPTION:
Date = date (yyyy-mm-dd)
Time = time (hh:mm:ss)
Temp = water temperature (oC)
SpCond = specific conductivity (mS/cm)
DO% = dissolved oxygen percent of saturation (%)
DOConc = dissolved oxygen concentration (mg/l)
Depth = stage height (m)
pH = log of the H+ ion concentration
Flow = discharge (l/s)
CALCULATIONS:
Fish Br. Rating Curve: NA
FOR MORE INFORMATION, CONTACT:
Wil Wollheim
OTHER DATA FILES TO REFERENCE:
All in the YSI series.
REFERENCE CITATIONS:
DATA AVAILABILITY STATUS:
Type 2
ARCHIVE INFORMATION:
Date of entry: Jan 21, 2004
Data entered by: W. Wollheim
Comments: