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TitleRecharge offsetting - maintaining recharge in an urban environment
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorCuddy, S
SourceRegional-scale groundwater geoscience in southern Ontario: an Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario open house; by Russell, H A JORCID logo; Ford, D; Priebe, E H; Geological Survey of Canada, Open File 8212, 2017 p. 10, Open Access logo Open Access
PublisherNatural Resources Canada
MeetingOntario Geological Survey and Geological Survey of Canada groundwater geoscience open house; Guelph; CA; March 1-2, 2017
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in Regional-scale groundwater geoscience in southern Ontario: an Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario open house
File formatpdf
NTS31D/03; 31D/04; 31D/05; 31D/06; 31D/11; 31D/12
AreaLake Simcoe; Greater Golden Horseshoe
Lat/Long WENS -80.0000 -79.0000 44.7500 44.0000
Subjectshydrogeology; groundwater; aquifers; groundwater resources; resource management; urban planning; groundwater regimes; recharge rates; hydrologic environment; hydrologic budget; Lake Simcoe watershed; Stormwater Management
ProgramGroundwater Geoscience Aquifer Assessment & support to mapping
Released2017 02 22
AbstractThrough the updated Growth Plan for the Greater Golden Horseshoe (2016), the Lake Simcoe Watershed can expect growth of an estimated 9,000 hectares of new development over the next 25 years. The Province of Ontario has increased development density targets which will accordingly increase impervious areas in an already urban environment; making it more difficult to maintain predevelopment recharge rates. Typically, maintaining recharge has focused on the sustainability of natural features such as wetlands and cold water streams; however more recently, it has led to better management of municipal drinking water supplies and stormwater management throughout the Lake Simcoe Watershed. Due to the significant advancement of recharge-based policies within the Lake Simcoe Protection Plan (LSPP) and the South Georgian Bay Lake Simcoe Source Protection Plan, new and innovative development strategies are being implemented within the Lake Simcoe Watershed.
Since 2009, the Lake Simcoe Region Conservation Authority has implemented the LSPP recharge policies on behalf of member municipalities to ensure pre-development water balance targets can be achieved through the development plan. The LSPP requires any major development within the Lake Simcoe Watershed to submit a water balance which demonstrates changes to the pre-development water balance will be minimized. Development within a Significant Groundwater Recharge Area also requires a hydrogeological assessment and water balance demonstrating that the quality and quantity of groundwater in these areas and the function of the recharge areas will be protected, improved or restored.
More recently, the Approved South Georgian Bay Lake Simcoe Source Protection Plan came into effect July 1, 2015, which requires development proponents to complete water balance and hydrogeological assessments for future development activities proposed under the Planning Act or Condominium Act where applications are within the wellhead protection quantity area. The Source Protection Plan also requires that proponents demonstrate that their projects will maintain the pre-development groundwater recharge rates. The Policy is similar to the Lake Simcoe Protection Plan recharge policies, however it goes one step further and requires recharge offsetting should site conditions not allow for the implementation of on-site Low Impact Development measures to promote recharge. As a result, the Lake Simcoe Region Conservation Authority has developed a recharge offsetting program where all new development or redevelopment greater than 0.50 hectares requires recharge to be maintained after development so that there is no net reduction in water supplied to the groundwater system. Any loss in recharge after implementation of on-site measures will be offset through agreement with the Lake Simcoe Region Conservation Authority under the Conservation Authority's Urban Stormwater Retrofits Projects Program.
Summary(Plain Language Summary, not published)
Proceedings for Regional-Scale Groundwater Geoscience in Southern Ontario open house organized by the Ontario Geological Survey, Geological Survey of Canada and Conservation Ontario Geoscientists. Open house is on 2017-03-01 and 02. Purpose is public engagement and dissemination of geoscience completed in Southern Ontario during the past year.

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