The Government of Canada leads or supports a variety of initiatives that involve monitoring, assessing or managing cumulative effects. This record contains information about cumulative effects initiatives that are taking place across Canada. 16 federal departments and agencies that are involved in cumulative effects and related work were surveyed and 388 initiatives were collected. Each entry includes:• a description of the initiative• information about its location, partners involved, relevant industries, and overarching or related initiatives• links to further information or related Open Data sources

The Regional Deterministic Air Quality Analysis (RDAQA) is an objective analysis of surface pollutants which combines numerical forecasts from the Regional Air Quality Deterministic Prediction System (RAQDPS) and hourly observational data from monitoring surface networks over North America in order to produce a better description of the air quality at every hour. Chemical constituents include 03, SO2, and NO2 gases, as well as fine particulate matter PM2.5 (2.5 micrometers in diameter or less) and coarse particulate matter PM10 (10 micrometers in diameter or less). Geographical coverage is Canada and the United States. Data is available only for the surface level, at a horizontal resolution of 10 km. The products are presented as historical, annual or monthly, averages which highlight long-term trends in cumulative effects on the environment.

Water quality and ecosystem health data used to conduct a cumulative effects assessment of Canadian Great Lakes nearshore waters in support of the Great Lakes Water Quality Agreement are included in this dataset. The data was collected by various government and non-government agencies and organizations and integrated into this dataset to allow the assessment to be conducted. By conducting a regular, systematic assessment of cumulative effects in the nearshore waters of the Great Lakes Environment and Climate Change Canada (ECCC) is able to identify areas of high quality and areas under stress. Knowledge of ecological thresholds, other Great Lakes assessments, stressor information, indicators and local and traditional ecological knowledge will be used to aid in: 1) the identification and mapping of high quality nearshore areas and areas that are or may become subject to high stress and; 2) the determination of factors and cumulative effects that are causing stress or threats. Cumulative effects impacting the nearshore and future threats to areas of high ecological value will be better understood and the knowledge shared will assist in priority setting for science and management at a meaningful and practical spatial scale within each Great Lake and connecting channel.

Fisheries and Oceans Canada has conducted a cumulative human impact mapping analysis for Pacific Canada to support ongoing Marine Spatial Planning. Cumulative impact mapping (CIM) combines spatial information on human activities, habitats, and a matrix of vulnerability weights into an intuitive relative ‘cumulative impact score’ that shows where cumulative human impacts are greatest and least. To map cumulative impacts, a recently developed ecosystem vulnerability assessment for Pacific Canadian waters (Murray et al. 2022) was combined with spatial information on thirty-eight (38) different habitat types and forty-five (45) human activities following the methodology from Halpern et al.(2008) and Murray et al. (2015). The cumulative impact map is provided in a 1x1 km grid used for oceans management by Fisheries and Oceans Canada. For further information, please contact the data provider.

Launched in 2017, the Cumulative Effects of Marine Shipping (CEMS) initiative is part of Canada’s $1.5 billion Oceans Protection Plan, which is providing economic opportunities to Canadians today, while protecting our coasts and waterways for future generations. The Cumulative Effects of Marine Shipping initiative is another way that the Government of Canada is protecting our coasts and waterways.https://tc.canada.ca/en/marine-transportation/marine-pollution-environmental-response/cumulative-effects-marine-shippingAs part of this initiative, Transport Canada is working with Indigenous partners and stakeholders in six pilot areas across Canada. Together, we are trying to understand the effects of marine shipping in various coastal areas. These pilot areas include:- North Coast British Columbia- South Coast British Columbia- St. Lawrence and Saguenay Rivers, Quebec- Bay of Fundy, New Brunswick and Nova Scotia- Placentia Bay, Newfoundland- Cambridge Bay, Nunavut

To support the implementation of the Impact Assessment Act, Natural Resources Canada (NRCan) received funding over  five years (2018-23) for cumulative effects research to be conducted by three of NRCan’s science sectors – the Canada Centre for Mapping and Earth Observation within the Strategic Policy and Innovation Sector, the Canadian Forest Service, and the Geological Survey of Canada within the Lands and Minerals Sector – to conduct key earth observation, forest, and geoscience research. The overarching goal of this research is to inform regional assessment and related impact assessment processes, with a central focus on making the science and knowledge generated open and accessible to the public via the Open Science and Data Platform . Projects from all three sectors generated authoritative data on the status and trends of ecosystem parameters, as well as provided unique science and technical analysis, synthesis and advice on topics related to the cumulative effects of natural resource development. This Story Map synthesizes the cumulative effects science generated over the past five years. Through the Story Map platform, we hope to illustrate the national scale of this research program and the diversity of locations in Canada within which research has been conducted.

Hotspots represent active wildfires. Natural Resources Canada Canadian Wild Fire Information System identifies them by processing Infrared satellite images. This layer contains the hotspots that are selected to be used as input for the Regional Air Quality Deterministic Prediction System FireWork (RAQDPS-FW) to enable forecasting air quality while taking into account wildfire emissions. Geographical coverage is Canada and the United States. The products are presented as historical annual compilations which highlight long-term trends in cumulative effects on the environment.

The Regional Air Quality Deterministic Prediction System FireWork (RAQDPS-FW) carries out physics and chemistry calculations, including emissions from active wildfires, to arrive at deterministic predictions of chemical species concentration of interest to air quality, such as fine particulate matter PM2.5 (2.5 micrometers in diameter or less). Geographical coverage is Canada and the United States. Data is available at a horizontal resolution of 10 km. While the system encompasses more than 80 vertical levels, data is available only for the surface level. The products are presented as historical, annual or monthly, averages which highlight long-term trends in cumulative effects on the environment.

Boundaries (polygons) of areas designated as community watershed by government - that are all or part of the drainage area that is upslope of the lowest point from which water is diverted for human consumption by a licensed waterworks, if satisfied that, to protect the water that is diverted for human consumption, the area requires special management that is not otherwise provided for under this regulation or other enactment: to conserve the quality, quantity and timing of water flow; or to prevent cumulative hydrological effects that would have a material adverse effect on the water . Supercedes the '(DEPRECATED) BC Community Watersheds' dataset BC_COMMUNITY_WATERSHEDS

Faults in the valleys near Ottawa could rupture and produce strong, shallow earthquakes. This magnitude 5.5 scenario visualizes the effects of such an event. It does not represent the most severe earthquake that could occur, but one that is more likely and could still cause damage.