BARA - Dartmouth, NS - Sawmill River Watershed - Baseline YSI Study

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The Dartmouth, Sawmill River 4000 acre watershed forms part of North America’s only urban core boreal watershed within a population base in excess of 400,000 people (Halifax Regional Municipality) where the inner city lakes have not eutrophied and retain oxic lake bottoms for an average of 10 months/year up to temperatures ranging from 21-23 degrees Celsius. BARA sees this native capacity of our glacial till clay bottomed lakes to adsorb phosphorous as worth preserving within an urban core densified mixed residential, commercial and industrial landscape. The baseline monitoring forming this Dataset is intended to create graphic imaging of the correlation of the seasonal anoxia and specific/conductance to infer rate of internal loading levels as the iron and manganese flush phosphates from the glacial till lake bottom soils into the water column, and estimate a predictive index of water temperatures correlated to seasonal anoxia levels for lakes monitored. Recent history over the past four decades is 8 to 15 mg/L total phosphorous. BARA hopes the scientific talents of the local Marine Biologists from federal Department of Fisheries and Oceans (DFO), the Bedford Institute of Oceanography (BIO), local universities and Community College combine with the recreational and professional sport history of our lakes as the birthplace of Hockey, Starr Skates, and an active world class canoe, kayak and paddling race course, for the basis of modeling to all other North American boreal urban watersheds that seek to restore pre-industrial sustainable phosphate load modelling to their water courses. Of the 9 lakes monitored, BARA has partnered with and thanks Crombie REIT, HRM District #5, Gloria McCluskey, and Nova Scotia Sport Fisheries for funding to install a self-contained solar powered Aerator to improve fish habitat by reducing seasonal anoxia in the 4 hectare Lake Penhorn, by lowering the hypolimnion to near lake bottom, and supporting decomposition of lake bottom organics.

Version 2.0.0
Data Steward Email
Data Collection Organization Banook Area Residents Association (BARA)
Data Upload Organization Banook Area Residents Association (BARA)
Progress Code completed
Maintenance Frequency Code unknown
Topic Category Code inlandWaters
Keywords anoxia, Dartmouth, iron, manganese, internal loading, Nova Scotia
Spatial Extent -63.624° 44.663°, -63.497° 44.927° (W S, E N)
Vertical Extent 1969-12-31 to 1970-01-01
Temporal Extent 2014-08-04 to 2017-08-20
Date Published
Alternate Formats FGP-HNAP ISO:19115-2 (XML) , W3C DCAT (XML) , W3C DCAT (JSON-LD)


Banook Area Residents Association (BARA). 2022-04-30. "BARA - Dartmouth, NS - Sawmill River Watershed - Baseline YSI Study" (dataset). 2.0.0. DataStream.

Data Collection Information

YSI probe (Temp.; DO % & mg/l; Specific Conductance, Conductivity, Salinity; pH); & Secchi Disc metrics.

YSI meter was borrowed from Oathill Lake Conservation Society and maintained by their team of scientists and engineers.

Attribution Licence (ODC-By) v1.0

You are free to share, copy, distribute, use, modify, transform, build upon, and produce works from the data as long as you attribute any public use of the data, or works produced from the data, in the manner specified in the licence. For any use or redistribution of the data, or works produced from it, you must make clear to others the licence of the data and keep intact any notices on the original data.

Data Disclaimer

Your use, or any use of data, or information from this Data Set is without representations or warranties by BARA, any of its members, or contributors. All risk and liability, including direct and indirect damages arising from the use of this data or information is borne by you and the party making use of the data or information or any derivative data or information therefrom.

API Access

curl -G --data-urlencode "\\$filter=DOI eq '10.25976/8sx1-np85'" -H "x-api-key: PRIVATE-API-KEY"



DataStream system update: set citation to recommended default.


Initial Submission

Schema v1.7.0
Blockchain Transaction 0xc0dbe4ba6248670541e10bf436975db38ddafc9c2f7ee11df572c8ec2934d370
Blockchain Signed
Blockchain Verified
Digest SHA2-256:f530447bc085d16f111c5310a9afd5d2540cad72e4d12e7bc4cb043a12a874c6
File size 6.38 MB