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Lake Carrying Capacities Homepage-(based on productivity)

Modified: May 25, 2016                       

Possible exceptions in shallow and/or coloured lakes

A note of caution: This web page is primarily related to the limiting nutrients and cultural eutrophication and does not address a myriad of inevitable post–development stressors some of which are potentially of significant ecological concern on a cumulative level

Contents:

• Preferred recommendation on Total Phosphorus (TP) as a development objective:
  • Province of Québec's guidelines (2006)
  • Province of Ontario's "Protecting Water Quality in Inland Lakes on Ontario’s Precambrian Shield" (2010)
    
  • Fact sheet for the phosphorus guidance framework, CCME, 2004 (Canadian Council of Ministers of the Environment)
    
    
• Select examples of leadership taken by dedicated municipalities:
  • The District Municipality of Muskoka, Ontario based on ice-free period mean Chlorophyll a
  • Kings County, Nova Scotia (a jpeg scan from HRM's WRMS) based on ice-free period mean Chlorophyll a
    • But the trouble with Chlorophyll a as a development objective
    • Notes: Although both the above examples are in the case of septic system densities, a similar methodology is applied in setting the amount of serviced land that can be developed in the entire watershed without severely impacting the downstream lakes, ponds and rivers; the inevitable post-development inputs are transported via storm sewer discharges; buffer strips will do little in removing such stressors

• Also see our ongoing predictive modelling
• Buffer strips

• OECD (Organization for Economic Co-Operation and Development):- Eutrophication of Waters (Vollenweider et al); Probability Distribution Diagrams preferred for trophic analyses re what 100 limnologists may conclude; an example of HRM lakes; the OECD Management Model provides a certain safety margin for the design of the loading objectives by defining trophic categories approximately at the class midpoints

• Narrative on water quality
  

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