By the Miistakis Institute and teh Environmental Law Centre.
Prepared by Canada West Foundation.
A Survey of Economic Instruments for the Conservation and Protection of Biodiversity. Published June 2011. Cover shot is of Elbow Lake; headwaters of the Elbow River.
Alberta Environment and Parks website explaining Instream Flow Needs and linking to the documents describing the desktop method for determining instream flow needs.
Source for the full 100-page report.