PART FOUR: Much of California's arcane system of water rights stretches back to the Gold Rush. Basically, people who first claimed access to a water source have the first right to use it. It's a seniority based system: Older claims trump younger ones when water is scarce. But can a 19th century approach to water allocation survive in the 21st century? As it is now, too many people lay claim to shrinking water supplies. #CAwater2040READ MORE ►
Future of water
Can California's arcane water rights system change?