David Schindler and Robert Sandford say cutting down trees in the headwater region of the Castle River could hurt southern Alberta's water supply.
They say the forest acts like a sponge in the winter and releases water in the summer when it is most needed.
The experts say clear-cutting will reduce the area's ability to provide water to dry prairieland.
Redford has said a forest management agreement protects two-thirds of the land in question and less than one per cent of the trees are to be logged.
Schindler is a professor of ecology at the University of Alberta and Sandford has a role in Canada's support of the United Nations "Water for Life" initiative.