JD Mollard and Associates

JDMA was retained to lead the assessment of shoreline erosion impacts associated with the proposed Conawapa hydroelectric generation project, a 1500MW project on the lower Nelson River in Manitoba. JDMA’s responsibilities included an assessment of erosion setbacks and eroded sediment volumes entering the reservoir over a 30 year post-project period and an assessment of downstream effects. Work entailed detailed geological and topographic mapping of the reservoir shoreline using air photos, LiDAR topographic data and field studies; development of an extensive erosion monitoring system on existing reservoirs to develop erodibility coefficients, application of JDMA’s proprietary shoreline erosion model, historical shoreline mapping in existing upstream reservoirs and downstream river channel, investigation of mass wasting processes in the lower Churchill River as well as nearshore sedimentation processes using lacustrine sediment cores from existing reservoirs. JDMA worked closely with Manitoba Hydro and other consultants to develop an overall integrated assessment that considered erosion impacts together with sedimentation processes and the biological assessment of the aquatic environment.

Water resource studies                   Environmental studies