Jeffrey Mount, a recently retired professor of geology and founding director of the Center for Watershed Sciences, tells KQED radio that California will need to move southbound export water around the Sacramento-San Joaquin Delta to comply with current laws that put water needs and the environment on equal footing.

KQED Science Editor Craig Miller caught up with Mount aboard his 27-foot cruiser, “Tugnacious.” An edited version of their conversation aired March 1.