Plum Island Ecosystems

Ipswich River daily discharge, Ipswich, MA


USGS gaged daily discharge from the Ipswich River near Ipswich (01102000), draining 317.56 km2 of watershed. Data are used for determining freshwater flows into the Plum Island Sound Estuary, MA.

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Data were 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°39’35", long 70°53’39", 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, 1976–79.REVISED RECORDS--WSP 1621: 1930–58 (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
CALCULATIONS: 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 is downloaded from USGS web site, approximately annually
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

Version 07: July 29, 2019, updated data and metadata to November 29, 2018

Version 08: February 19, 2022, updated data and metadata to December 31, 2020


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