Site C Hydroelectric Project: Predicted Changes in Peace River Morphology and Sediment Transport

Site C Hydroelectric Project: Predicted Changes in Peace River Morphology and Sediment Transport

Author: Craig Nistor, Violeta Martin
Conference: ICOLD 2017 Annual Meeting
Date: July 3-7, 2017

ABSTRACT
The 1100 MW Site C Hydroelectric Project involves the construction of a large dam on the Peace River in British Columbia, Canada. The Environmental Impact Statement (EIS) for the project considered technical, socio-economic and environmental aspects and described the predicted effects in the context of previous hydroelectric development and future climate change. Studies were based on long-term field observations and comprehensive modeling. The geomorphology and sediment transport study completed for the EIS predicted changes in channel morphology and suspended sediment loading during construction and operations, which could have ramifications for domestic and industrial water users and aquatic resources. Suspended sediment and turbidity gauging were used to characterize baseline conditions in the Peace River and its key tributaries. A three-dimensional hydrodynamic model was used to simulate suspended sediment dynamics and deposition within the Site C reservoir. During operations the reservoir will trap most of the incoming sediment, with the initial reservoir volume predicted to be reduced by 2.5% after 50 years. The corresponding reduction in mean annual suspended sediment load is predicted to be 54% immediately downstream of the reservoir, but only 2% 300 km downstream at the Town of Peace River, Alberta, because of large sediment inputs from tributaries.

 

Download the full technical paper.

Download

Recent Insights

September 2025
Laying Groundwork for Future Mining: Infrastructure Support by Knight Piésold
September 2025
Challenges of Tailings Transport Pumping Systems in Negative Static Head Applications
September 2025
Hydraulic Evaluation of Tailings Transport Systems in Mountainous Terrain: Density Wave Analysis
September 2025
The Role of Rheology Tests in the Design and Operation of Long-Distance Slurry Transport Systems
August 2025
Safe Dams, Straight Talk: The Knight Piésold Difference
July 2025
Knight Piésold Zambia: Building a Future of Engineering Brilliance and Local Empowerment
July 2025
Water Engineering for Modern Mining: Bridging Mining with Sustainability
June 2025
The Essence of Material Compatibility in Advanced Barrier Systems of Existing TSFs
June 2025
Inverted Barriers in Tailings Storage Facilities: Lessons Learnt
June 2025
Prioritizing the Mitigation of Legacy Geomechanical Mine Hazards Using a Risk-Based Approach
May 2025
Knight Piésold: Sustainable Projects in DRC Through Baseline Studies
April 2025
Advancements in Geotechnical Investigations for the Characterisation of Upstream Tailings Dams in SA
November 2024
Knight Piésold: Commitment to African Excellence
November 2024
Design of a Co-disposal Facility for Thickened Tailings and Potentially Acid-generating Waste Rock
November 2024
Compaction Sensitivity in Tailings Stack Infiltration Modeling: Unsaturated Properties Uncertainty Analysis
November 2024
Volumes of Dam Material Mobilized by Erosion During Tailings Dam Failure Events
October 2024
Estudio de rotura de una presa de jales en la zona centro-norte de México
September 2024
Grouting to Reduce Seepage at Neckartal Dam, Namibia
September 2024
Influence of Pre-Existing Mobilized Zones on B3 Cave Propagation and Initial Subsidence at the New Afton Mine
September 2024
Importance of Indigenous Community Engagement related to ARD/ML and Long-Term Water Quality