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:
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 Title:||Year 2009, 15 minute measurements of stage, water temperature in a small headwater stream draining draining a mainly wetland catchment (49% wetlands/swamp + 36% forest), Bear Br., draining Cedar Swamp, Reading, MA.|
|Investigator 1:|| |
|Address line 1:||Morse Hall|
|Address line 2:||UNH|
|Address line 3:|
|Associate Investigators:||Joe Thouin|
|Keywords:||PIE LTER, disturbance, Cedar Swamp, Bear Br, wetland, discharge, water temperature, water stage|
|Abstract:||Continuous measurements, every 15 minutes, were made of stage and water temperature in a small headwater stream draining a mainly wetland catchment (49% wetland + 36% wetland). Discharge is determined from stage using discharge vs stage regressions.|
|Contact:||Plum Island Ecosystems LTER Information Manager
The Ecosystems Center
Marine Biological Lab
7 MBL St
Woods Hole, MA 02543
Phone (508) 289 7485
Online URL: http://ecosystems.mbl.edu/PIE/
|DATA FILE INFORMATION:|
|Data File URL||http://ecosystems.mbl.edu/PIE/data/WAT/data/WAT-YSI-Swamp-2009.dat|
|Data File Name||WAT-YSI-Swamp-2009|
|Number of Data Records||25944|
|Other Files to Reference||All in the YSI series.|
|Availability Status||Type 1|
|Quality Control Information|
|Maintenance Description||Periodic with improvement of rating curve, particularly as more high discharge events are incorporated.|
|Log of Changes:||Updated in Jan 2010|
|Version 01, 22Jan2010 keyword update and new data|
|Version 02, 31Mar2010 date data update|
|RESEARCH LOCATION:||Site 1||Site 2|
|Location Bounding Box|
|West Bounding Coordinate|
|East Bounding Coordinate|
|North Bounding Coordinate|
|South Bounding Coordinate|
|OR if single point location|
HOBO data loggers were used exclusively this year to monitor stage height and water temperature
HOBO: Depth and water temperature are recorded by the HOBO data logger. Depths are corrected for barometric pressure changes using readings in an additional HOBO datalogger deployed at Marshview Farm. The HOBO is deployed in a a PVC tube, which was attached to ree-bar driven into the stream bed. The PVC tube has holes drilled to allow adequate water circulation.
NOTES AND COMMENTS:
Velocity measurements were made using a Marsh McBirney current meter. Discharge estimates in Cedar Swamp (Bear Br.) are based on a power rating curve that contains measurements up to a depth of 0.9 meters, as standardized to depth measured with the HOBO datalogger (Column = HOBO_Depth), which is above bankfull stage. Rating curve has been standardized to HOBO_Depth to allow application of a single rating curve across years. Rating curve has an R2 of 0.96 using 10 measurements between 2005 and 2007. All files in this series are currently standardized to HOBO_depth.
The column Depth_Device is included when combining files from several years, over which several different devices were used to calculate depth. HOBO_Depth is the depth that is standardized across all measurement devices so that a single rating curve can be applied.
Discharge rating curve :
Discharge (l/s) = 1085.3 (depth) ^ 4.5944
where depth is HOBO_Depth
Measurements from 2008 and 2009 suggest that the rating curve has not changed since 2007. However, the rating curve is subject to change in the future as we obtain additional measurements.
|Variable Name||Variable Description||Units||Measurement Scale||Code Information||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) 24 hour||datetime||hh:mm||blank cell|
|Temp||water temperature (oC)||celsius||interval||real||blank cell|
|HOBO_Depth||stage height standardized to HOBO depth (m)||meter||ratio||real||blank cell|
|Depth_Device||depth measurement device used to determine discharge||nominal||YSI = YSI depth sonde | SIGMA = Sigma autosampler depth sonde | TEMP_HOBO = HOBO depth sonde deployed in temporary stilling well | HOBO = HOBO depth sonde deployed in permanent stilling well||blank cell|