A major cause can be groundwater withdrawal resulting from the needs of a growing population. (realclimate.org)
«The politics of water are more challenging than any other issue the state faces,» said Fran Pavley, a California state senator who helped draft a much - praised package of state laws passed last year regulating groundwater withdrawals for the first time. (scientificamerican.com)
It used models and forecast that as groundwater withdrawals continue there in the future, as much as 90 percent of the supply could be drawn directly from the Colorado. (scientificamerican.com)