A workshop on aquatic systems was held 20 and 21 September 1978 in Edmonton, Alberta. Participants included members of Alberta Environment, Alberta Recreation, Parks and Wildlife, Fisheries and Environment Canada, and consultants conducting research for the Alberta Oil Sands Environmental Research Program. T.W. Chamberlin of the Resource Analysis Branch, British Columbia Ministry of the Environment and E.A. Harding, a former Project Biologist for the branch, presented the philosophy and structure of aquatic system inventory as conducted by the Resource Analysis Branch. Additional topics included data management and examples of detailed interpretive projects. Practical sessions provided air photo interpretation practice relevant to aquatic inventory.