When this happens there isnít much water left for the agricultural farmers and ranchers of the Columbia Basin.
This really isn't accurate. The water shortage stems from water rights being historically over-allocated to agriculture with little or no concern given to fish. This short-sighted, 'manifest destiny' direction, combined with 'use-it-or-lose-it' management dictums, unique to Western water law is at the heart of there not being enough water for everyone, including salmon.
Study the history to undestand where we are today.