Acceptance and utilization of LTER data requires that:
(1) The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.
(2) 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.
(3) A copy of any resultant publications should be sent to:
Principal Investigator
Ecosystems Center
Marine Biological Laboratory
7 MBL St.
Woods Hole, MA 02543
| Dataset URLs: | METADATA: HTML, Rich Text, XML(EML compliant) DATA: Comma Delimited, Excel file with Metadata and data |
| Dataset ID: | WAT-YSI-UpperIps-2001.01 |
| Dataset Title: | Year 2001, 15 minute measurements of stage, water temperature, conductivity, dissolved oxygen, and pH on the Ipswich R. mainstem at North Reading, just upstream of Rt. 28 (~48 km2 drainage area). |
| Investigator 1: | |
| First Name: | Charles |
| Last Name: | Vorosmarty |
| Address line 1: | Ecosystems Center |
| Address line 2: | MBL |
| Address line 3: | 7 MBL St |
| City: | Woods Hole |
| State: | MA |
| Zip Code: | 02543 |
| Country: | USA |
| Associate Investigators: | Wilfred Wollheim, Brian Pellerin |
| Keywords: | PIE LTER, Ipswich River, discharge, water temperature, conductivity, pH, dissolved oxygen |
| Abstract: | 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 is determined from stage using discharge vs stage regressions. Several day gaps occur periodically due to removal for recalibration. |
| Contact: | Plum Island Ecosystems LTER Information Manager The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole, MA 02543 Phone (508) 289 7485 Email: pie_im@mbl.edu Online URL: http://ecosystems.mbl.edu/PIE/ |
| DATA FILE INFORMATION: | |
| Data File URL | http://ecosystems.mbl.edu/PIE/data/WAT/data/WAT-YSI-UpperIps-2001.dat |
| Data File Name | WAT-YSI-UpperIps-2001 |
| Beginning Date | 6/27/2001 |
| End Date | 12/18/2001 |
| Number of Data Records | 14217 |
| Other Files to Reference | All in the YSI series |
| Availability Status | Type 1 |
| Quality Control Information | |
| Maintenance Description | |
| Log of Changes: | 01) 30 Oct 2007 updated metadata to EML level 3+ |
| RESEARCH LOCATION: | Site 1 |
| Geographic Description | YSI-IR |
| Location Bounding Box | |
| West Bounding Coordinate | |
| East Bounding Coordinate | |
| North Bounding Coordinate | |
| South Bounding Coordinate | |
| OR if single point location | |
| Latitude | |
| Longitude | |
| 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. See discussion below for development of the discharge-stage relationship. Recalibration was performed roughly every 4-6 weeks. Instrument drift during deployment periods was not significant. RESEARCH LOCATION: Locations are in Massachusetts State Plane coordinates. The site is located on the Ipswich R. mainstem at North Reading, just upstream of Rt. 28 (~48 km2 drainage area). The contributing area includes a large component of urban land use, but with significant wetland area remaining, especially in floodplain. Large amounts of water withdrawals occur upstream. STATION STATE X STATE Y YSI-IR 232080 923630 NOTES AND COMMENTS: Discharge measurements in the Ipswich R. at North Reading are based on a linear rating curve that contains measurements up to a depth of 0.8m. Flows above this amount are estimated using a linear extrapolation. Thus flows determined from levels greater than 0.475m are approximate (4 % of the readings in 2001 deployment period).Rating curve had an R2 = 0.99. Measurements are based on 8 measurements taken in 2001. Dissolved oxygen concentrations reflect water column levels. NA refers to data not available. |
| Variable Name | Variable Description | Units | Measurement Scale | Code Infomation | Number Type | DateTime Format | Missing Value Code | Missing Value Code Explanation |
| Date | date (yyyy-mm-dd) | datetime | yyyy-mm-dd | blank cell | ||||
| Time | time (hh:mm:ss) 24 hour | datetime | hh:mm:ss | blank cell | ||||
| Temp | water temperature (oC) | celsius | interval | real | blank cell | |||
| SpCond | specific conductivity (mS/cm) | millisiemensPerCentimeter | ratio | real | blank cell | |||
| DO% | dissolved oxygen percent of saturation (%) | percent | ratio | real | blank cell | |||
| DOConc | dissolved oxygen concentration (mg/l) | milligramsPerLiter | ratio | real | blank cell | |||
| Depth | stage height (m) | meter | ratio | real | blank cell | |||
| pH | log of the H+ ion concentration | dimensionless | ratio | real | blank cell | |||
| Flow | discharge (l/s) | litersPerSecond | ratio | real | blank cell |