Westlands Water District underscored a basic truth in rejecting a decade-long effort to construct a $17.1 billion twin tunnel project to transfer water from the Delta to farms and cities to the south and west: Without clear financing, the project will collapse. But the vote by seven Westlands board members, representing 600 San Joaquin Valley farm owners, doesn’t end California’s water struggles. Gov. Jerry Brown, the project’s main proponent, could be forgiven if he walks away from the Delta. He shouldn’t. Whoever replaces Brown as governor after the 2018 election will be less knowledgeable on this slow-motion mess.