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-IpswichDischarge01102000.06
Dataset Title:Ipswich River daily discharge, Ipswich, 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, Catherine Caruso
Keywords:PIE LTER, Plum Island Ecosystems, Massachusetts, Ipswich River, disturbance, discharge, stream, flow, river
Abstract:USGS gaged daily discharge from the Ipswich River near Ipswich (01102000), draining 317.56 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-IpswichDischarge01102000
Beginning Date 6/17/1930
End Date 1/18/2016
Number of Data Records 31262
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 19, 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 near Ipswich, MA; on left bank 200 ft downstream from Willowdale Dam, 1.5 mi downstream from Howlett Brook, and 4 mi upstream from Ipswich.  
Location Bounding Box    
West Bounding Coordinate    
East Bounding Coordinate    
North Bounding Coordinate    
South Bounding Coordinate    
OR if single point location    
Latitude 42.659722  
Longitude -70.894167  
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 423935", long 705339", Essex County, Hydrologic Unit 01090001, on left bank 200 ft downstream from Willowdale Dam, 1.5 mi downstream from Howlett Brook, and 4 mi upstream from Ipswich.
PERIOD OF RECORD--Discharge: June 1930 to current year.
Water-quality records: Water years 1954, 197679.
REVISED RECORDS--WSP 1621: 193058 (monthly runoff). WDR MA-RI-84-1: drainage area.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 20.63 ft above National Geodetic Vertical Datum of 1929.
REMARKS--Diversions upstream for municipal supply of Reading, Lynn, Peabody, Danvers, Salem, and Beverly. Occasional regulation by dams and reservoirs upstream.
COOPERATION BY--Massachusetts Department of Environmental Protection, Division of Watershed Management. Massachusetts Department of Conservation and Recreation

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      
Q english discharge (cubic feet per second) footCubedPerSecond ratio   real      
Flag data value qualification code   nominal Eqp = Equipment malfunction | A = Approved for publication Processing and review completed | P = Provisional data subject to revision | e = Value has been estimated