Data products of the LCRR flood study

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As part of the IJC's Lake Champlain-Richelieu River (LCRR) basin flood Study, technical working groups composed of experts from government agencies and universities in Canada and the United States analyzed and evaluated mitigation measures using various models to simulate floods and their impacts on the floodplain. Following the recommendation of the ILCRR Study Board, the IJC is making available the data products, tools and models derived from the study that are deemed to be of interest to the public and stakeholders. These products fall into four categories. 

1. Flood mapping by scenarios (water level increments)
2. Flood hazard mapping
3. Mapping of modeled flooding impacts and water level changes under considered mitigation measures.
4. Numerical models

Products will be complemented by a link to an online repository where raw data, metadata and associated reports can be downloaded 

Items identified with * include mapping products.

The data contained within this map application is for informational and viewing purposes only. Property boundaries may appear to be inaccurate due to differences in the geographic coordinate systems used in this application. This data is not designed to provide accurate information regarding property boundaries.  The IJC does not warrant that the data or map application is accurate or up to date, and will not be updating the data or map application in the future. The IJC is not liable, either in Canada or the United States, for any damages, losses, or claims arising out of the use of the data or map application. For specific information relating to property boundaries or official flood mapping please contact the appropriate municipal, state, provincial and/or federal agency.

The following datasets consist of hydraulic and flood impact maps over a range of water levels. These data can be combined with flood forecasting information to inform emergency measures planning.

•  Water levels 
•  Water depths  *
• Flow velocity (coming soon)
•  Social sensitivity  *
•  Structural residential damage  *

These datasets present a mapping of the annual probability of flooding based on historical water supplies and modelling. These data can be useful for floodplain management.

•  Flood hazard (historical annual flooding frequency)  *
•  Flood risk  *

These datasets present the results of the social, economic, environmental, and indigenous interest indicators on which is based the evaluation of the mitigation measures under consideration. The two-dimensional indicators are mapped to showcase years of high and low conditions and the average conditions through the reference period (1924 to 2018). 

Hydraulics:

•  Water depths  *
•  Flow velocity 

Social:

•  Social sensitivity 
•  Number of flooded residential buildings  *
•  Number of flooded non-residential buildings 

Economic :

•  Structural damage to the residential sector  *
•  Structural damage to the commercial, industrial and recreational sector  *
•  Agricultural yield loss  *

Environmental :

•  Muskrat winter lodge viability  
•  Wetland class area  *
•  Northern Pike spawning and larval development habitat area  *
•  Least Bittern reproduction potential  *
•  Spiny softshell turtle egg survival  
•  Waterfowl staging habitat area during migration  *
•  Copper Redhorse spawning and larval development habitat area  *

Indigenous interest :

•  Wild rice survival probability 
•  Basket-grade Black Ash habitat area  *

Note: Information on additional performance indicators can be found in the  LCRR study reports .

The following numerical models were developped or calibrated to simulate water levels, the effects of mitigation measures or to support decision making.

•  Integrated Social Economic Environmental (ISEE) system 
•  2D hydrodynamic model 
•  Water balance model 
•  Digital elevation model 
• Collaborative Decision Support Tool (CDST)