Plum Island Ecosystems LTER Database

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-IP-IpswichDischarge01101500.06
Dataset Title:Ipswich River daily discharge, South Middleton, MA
Investigator 1: 
First Name:Wil
Last Name:Wollheim
Address line 1:Institute for the Study of Earth, Oceans, and Space
Address line 2:University of New Hampshire
Address line 3:8 College Rd.
Zip Code:03824
Associate Investigators:Hap Garritt
Keywords:PIE LTER, Plum Island Ecosystems, Massachusetts, Ipswich River, disturbance, discharge, stream, flow, river
Abstract:USGS gaged daily discharge from the Ipswich River at South Middleton, Massachusetts (Station 01101500), draining 112.13 km2 of watershed. . Data is used for determining freshwater flows into the Plum Island Sound Estuary, MA.
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:
Data File URL
Data File Name WAT-IP-IpswichDischarge01101500
Beginning Date 6/1/1938
End Date 1/18/2016
Number of Data Records 28356
Other Files to Reference
Availability Status Type 1
Quality Control Information
Maintenance Description Data is downloaded from USGS web site, approximately annually
Log of Changes: Version 01; EML metadata compiled in Excel
Version 02; data update, 27-Jan-2011
Version 03: January 31, 2012, updated data and metadata. Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 1/27/12 4:35 PM for QA/QC to EML 2.1.0
Version 04: April 18, 2013, data and metadata updated to comply with importation to Drupal and LTER PASTA. Research location name and description updated.Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 3/14/13 12:02 PM for QA/QC to EML 2.1.0
Version 05: October 23, 2013, data and metadata updated. Used MarcrosExportEML_HTML (working)pie_excel2007_Sep2013, 9/30/13 2:57 PM for QA/QC to EML 2.1.0
Version 06: February 9, 2016, updated data and metadata to January 18, 2016 to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Jan2015.xlsm 1/15/15 4:26 PM for QA/QC to EML 2.1.0
Geographic Description Ipswich River at South Middleton;on right bank in Peabody, 700 ft downstream from Boston Street Bridge at South Middleton, 1.3 mi downstream from Wills Brook, and 2 mi south of Middleton.  
Location Bounding Box    
West Bounding Coordinate    
East Bounding Coordinate    
North Bounding Coordinate    
South Bounding Coordinate    
OR if single point location    
Latitude 42.5694  
Longitude -71.0275  
Taxonomic Protocols
Organisms studied
Methods:Data was downloaded from USGS web site:
# ---------------------------------- WARNING ----------------------------------------
# The data you have obtained from this automated U.S. Geological Survey database
# have not received Director's approval and as such are provisional and subject to
# revision. The data are released on the condition that neither the USGS nor the
# United States Government may be held liable for any damages resulting from its use.
# Additional info:
# File-format description:
# Automated-retrieval info:
# Contact:

LOCATION--Lat 42 3410", long 71 0139", Essex County, Hydrologic Unit 01090001, on right bank in Peabody, 700 ft downstream from Boston Street Bridge at South Middleton, 1.3 mi downstream from Wills Brook, and 2 mi south of Middleton.
DRAINAGE AREA--44.5 mi2.
PERIOD OF RECORD--Discharge: June 1938 to current year.
Water-quality records: Water years 1957, 1959, 1999.
REVISED RECORDS--WSP 1301: 1942(M). WSP 1621: 193858 (monthly runoff). WDR MA-RI-84-1: drainage area.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 44.97 ft above sea level (Massachusetts Geodetic Survey benchmark.)
REMARKS--Flow affected by upstream withdrawals for municipal supply of Lynn, Lynnfield, North Reading, and Wilmington. Occasional regulation by mill upstream Diversions upstream for municipal supply of Reading, Lynn, and Peabody.
COOPERATION BY--Massachusetts Department of Conservation and Recreation, Office of Water Resources and Department of Environmental Protection, Office of Watershed Management

Published data from USGS is in ft3 sec-1. We have converted this to m3 sec-1 by multiplying the data by the following conversion factor: 1ft3 = 0.0283168 m3

Data Table

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    
Q metric discharge (cubic meters per second) meterCubedPerSecond ratio   real   NA NA=data not available
Q english discharge (cubic feet per second) footCubedPerSecond ratio   real   NA NA=data not available
Flag data value qualification code   nominal Eqp = Equipment malfunction | *** = temporarily unavailable | A = Approved for publication Processing and review completed | P = Provisional data subject to revision | e = Value has been estimated