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After massive downpours flooded California’s rivers and packed mountains with snow, the state reported Monday the first increase in groundwater supplies in four years. The state saw 4.1 million ...
Ten years ago, California adopted a law to curb chronic overpumping of groundwater. Significant challenges remain, even as the state works toward its goals.
Herman Bouwer (1927–2013) was a hydrological scientist [1] who worked in groundwater hydrology and water resources management, with a specialization in the area of Managed Aquifer Recharge (MAR). He was born in the Netherlands and moved to the United States in 1952 to study for his PhD at Cornell University .
California officials voted Tuesday to step in to monitor groundwater use in part of the crop-rich San Joaquin Valley in a first-of-its-kind move that comes a decade after local communities were ...
In California, groundwater accounts for around 41% of the state's total water supply, [1] although this number varies between wet and dry years. During years of greater than average rainfall, less groundwater is used to allow for reserves to be available during dry years. Up to 60% of all water can be sourced from groundwater during dry years.
The effectiveness of the groundwater recharge through the soil was studied from 1971 to 1980. Over that period, the average recharge rate was 10,848 acre feet per year at 86 percent facility efficiency. The 10-year mean actual recharge rate based on actual water delivered, total ponded area, and total days of recharge was 4.7 inches per day.
The state groundwater law, which was signed nearly 10 years ago, requires local agencies in many areas to develop groundwater plans and curb overpumping by 2040.
AB 1739 gives the California Department of Water Resources (DWR) or a groundwater sustainability agency (GSA) the authority to establish fees (detailed in SB 1168) and offer support to "entities that extract or use groundwater to promote water conservation and protect groundwater resources". GSAs are locally controlled organizations in ...