Hydrogeographers such as Peter Vorster of the Bay Institute are on one side. KTVU met him along the last stretch of the wild San Joaquin River, arguably the most desiccated -- and desecrated -- major river in California. "This has a lot of salts in it from the agricultural runoff, Vorster remarked. "The water that would have been in here, a lot of it has been diverted to make these fields grow these amazing crops. The San Joaquin Valley is the most productive agricultural region, arguably, in the world."