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Dams and Hydrology

Water Level and Flow Rates

Information on the water gauging stations operated by Centre d'expertise hydrique du Québec (CEHQ) is provided so that residents living near lakes or waterways as well as any interested individual or organization can follow the behavior of certain bodies of water.

Québec Hydrometric Network (French)

CEHQ operates a network of about 230 gauging stations, of which 205 transmit data continuously, 24 hours a day, seven days a week. Data is recorded every 15 minutes and sent to an integrated telemetry data collection system by telephone or satellite every hour or every three hours. It is therefore possible to obtain information on water levels and flow rates on a daily basis, for monitoring during spring runoff or summer droughts, optimizing dam operation, or keeping track of the level of certain water bodies for outdoor activities

Hydrometric Station Data

Hydrological and Hydraulic Forecasts (French)

This link shows water levels and flow rates of several waterways in Québec forecasted over the next few days and serves mainly to support the management of dams operated by the Québec government. Please note that the forecasts do not take into account the possible presence of ice jams.

Impact of climate change on Québec’s water regime (French)

The Atlas hydroclimatique du Québec méridional describes the impact of climate change on Québec’s water regime up to 2050. This document is intended primarily for water resource professionals and is a support tool for adapting to climate change.

Maximum flood flow (French)
Knowledge of maximum flood flow values is required for various hydrologic, hydraulic and environmental study analytics. The CEHQ employs a number of different methods to determine these values.

Methods of Estimating Minimum Annual Flow Rates (French)

Centre d’expertise hydrique du Québec uses various methods to determine minimum annual flow rates, which are essential to the analysis of certain environmental issues. Potential minimum flow rates are very useful for determining available water flow, maintaining a minimal flow rate, and estimating the contaminant load that can be added without compromising the aquatic environment and its various uses (aquatic life, water supply, etc.).

Impact of climate change on Québec’s water regime

The Atlas hydroclimatique du Québec méridional describes the impact of climate change on Québec’s water regime up to 2050. This document is intended primarily for water resource professionals and is a support tool for adapting to climate change.

Minimum Annual Flow Rate at Québec’s Gauging Stations (French)

The purpose of this study is to calculate and map minimum annual flow rates in Québec to provide users a rapid overview of minimum annual flow rates in any location throughout Québec. 

Delineation of active and closed hydrometric station watersheds (French)

This link provides the ArcGIS files regarding the delineation of watersheds for active hydrometric stations. Initial delineation points do not necessarily correspond to the physical location of the actual hydrometric station shelter. In fact, the stream gauging location is used to evaluate the size of the hydrometric station watershed, and this may not be identical to the position of the shelter in some cases.

 

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Gouvernement du Québec
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