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McIntosh Run watershed

Soil & Water Conservation Society of Metro Halifax (SWCSMH)

Updated: August 12, 2015            Powers Pond watershed      



Water Quality

Chemical vs Biological monitoring

Select scientific modelling and chemical/biological limnology are part of our miscellaneous archives

The Powers Pond watershed flow chart;
peruse our predictive modelling, and view the relevant models; the Nova Scotia lake hypolimnion project; the paleolimnology of lakes in the HRM

  • Deep station total phosphorus (TP)- comparison with our hindcast models; October 18, 2013
  • Phosphorus:- Details on LCC (Lake Carrying Capacity)/Threshold values of lakes, and comparison with artificially high values chosen by the HRM; March 14, 2014

  • Water Quality Monitoring of HRM; September 04, 2002:

    On my complaint to HRM's only professional ecologist, Tony Blouin PhD, graciously agreed that the data for TP were erroneous as well (see his email d/October 09, 2002)!

    Date: Wed, 09 Oct 2002 11:09:04 -0300
    From: Tony Blouin <blouint@region.halifax.ns.ca>

    To: (Shalom Mandaville)

    Cc: Dan English <englisd@region.halifax.ns.ca>,
    Peter Kelly <kellyp@region.halifax.ns.ca>,
    George McLellan <mclellg@region.halifax.ns.ca>,
    Rick Paynter <paynter@region.halifax.ns.ca>,
    John Sheppard <sheppaj@region.halifax.ns.ca>

    Subject: Re: Fwd: McIntosh Run, Spryfield- "HRM's-funded' very recent sampling work , as reported to HRM Council as an Info Item on September 17, 2002 and , related aspects

    Dear Mr. Mandaville:

    Thanks for your note of Sept. 23, 2002 (reproduced below) regarding recent sampling work done in McIntosh Run, in which you point out the inadequacy of the phosphorus data for assessing trophic status of surface waters, and the lack of biological trophic data. The intent of this sampling program was to test for sewage leaks or overflows into the McIntosh Run system from municipal sewer pipes, rather than to assess trophic status. As such, the focus was concentrated on bacteriological parameters.

    However, as you have pointed out, if phosphorus data is to be collected for natural surface waters, then analysis methods of adquate sensitivity should be employed. As a result of your suggestion, appropriate HRM staff will be notified to ensure that, when HRM contracts water sampling work which includes phosphorus, the appropriate high-sensitivity (1 microgram/liter detection limit) methodology is specified.

    Tony Blouin, PhD
    Manager of Environmental Policy
    Planning & Development Services
    Halifax Regional Municipality
    Duke Tower, Halifax, NS
    PO Box 1749, B3J 3A5

    Ph. (902) 490-4610
    Fax (902) 490-4760


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