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Lake Fletcher, Fall River

Soil & Water Conservation Society of Metro Halifax (SWCSMH)

Updated: August 08, 2015    Shubenacadie River headwaters


The Shubenacadie song (i.e., the Stonemason's song), and the history of the Stonemason's song; and

Lifelike murals at the heavily travelled MicMac Parclo in Dartmouth, Nova Scotia, Canada

Acknowledgements


Contents:



Water Quality

Chemical vs Biological monitoring


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


The bathymetric map; the morphological data; the Shubie headwaters flow chart;
peruse our predictive modelling, and view a relevant model; 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


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    Lockview-MacPherson WPCP

    "This is a 100,000 gal/day extended aeration treatment process with tertiary filtration, nutrient (phosphorus) removal, nitrification and ultra violet disinfection. Due to the environmental sensitivity of the Fletcher Lake receiving water, the highest quality tertiary effluent was required. Nova Scotia Department of Environment and Labour discharge parameters are: 10 ppm BOD 5, 10 ppm suspended solids, and 1.5 ppm phosphorus." (per the HRM's website, May 08, 2005)

    It is not known though if an assessment has been carried out by a `qualified limnologist'.

    In addition, no studies were conducted to assess the downstream impacts as a result of endocrine disruptors. The EDCs of concern in this are bisphenol A (BPA), and ethinyl estradiol (EE2), because of their environmental relevance and frequent human exposure. All these have been found in streams throughout the United States, England, and Japan. Also, each compound is relevant in terms of human exposure.

    "Considerable evidence exists that aquatic organisms are being exposed to, and impacted by, a wide range of compounds that mimic hormones. Fish exposed to these compounds often exhibit an array of responses including depressed circulating sex steroid levels, reduced gonad size and fecundity, and males have become feminized. One of the most sensitive and common tools used to assess exposure to endocrine disrupting chemicals (EDCs) with estrogenic activity is the presence of vitellogenin (VTG), an egg yolk protein precursor, in the plasma of male fish. Recent studies have shown elevated plasma VTG in male fish downstream of sewage treatment plants." (ELA-DFO)

    [Img-i-arrow-green.gif]  Fall River sewage spill forces boil order; December 30, 2003



    Acknowledgements

    Google Earth for the maps

    The jpeg scan of the underwater picture was extracted by biologist, Peter Shacklock, from the Tv show we had produced featuring underwater video of the fish species of the Shubenacadie Lake system during year-1994.


    Shubenacadie River headwaters                     Soil & Water Conservation Society of Metro Halifax (SWCSMH) Master Homepage

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