California water rights: You can’t manage what you don’t measure
By Ted Grantham and Joshua Viers – UC David Center for Watershed Sciences – California Water Blog – August 20, 2014
California water experts have long known the amount of surface water granted by water rights far exceeds the state’s average supplies. Historically, the over-allocation has not raised much concern; in most years, there has been enough runoff of rain and snowmelt to go around. But circumstances are changing. California is suffering the third driest year in a century and demands for water are at an all-time high. The huge gap between allocations and natural flows — coupled with great uncertainty over water-rights holders’ actual usage — is increasingly creating conflicts between water users and confusion for water managers trying to figure out whose supplies should be curtailed during a drought. For full blog post, click here.