HEC-ResSim Hydropower Model for the Columbia River Basin, Columbia River Treaty 2014/2024 Review
The U.S. Army Corps of Engineers (USACE) and the Bonneville Power Administration (BPA), collectively, the U.S. Entity, are currently in discussion with BC Hydro (Canadian Entity) regarding the future of the Columbia River Treaty (The Treaty) signed in 1964. This effort is known as Treaty 2014/2024 review. Flood control and hydropower operations were the focus of the Treaty. One major study of The Treaty is a Flood Risk Assessment of the Columbia River. An essential component of the flood risk assessment is a system-wide HEC-ResSim hydropower model for the Columbia River basin.

Requested by the Portland District, USACE, the Hydrologic Engineer Center (HEC) is responsible for the development of the HEC-ResSim hydropower model. HEC has requested modeling support from WEST Consultants, Inc. (WEST) in this model development. Tasks include modeling scoping and coordination, participation in conference calls and meetings, data collection and organization, and model development and documentation.

The HEC-ResSim hydropower model is aimed to emulate features of BPA’s HydSim model. The HEC-ResSim hydropower model development is a major effort in reservoir simulation because (1) the Columbia River basin is extremely large and complex, (2) there are 51 projects that need to be included in the hydropower model, (3) in addition to local operating constraints and criteria, extensively scripted logic is required to represent the logic for determining the Operating Rule Curves from multiple power and refill rule curves, the Mica/Arrow storage balance, and Arrow Power Operating Criteria. WEST is currently developing and testing complex scripts and implementing them in the HEC-ResSim model.