Until the early 1900s, central California’s Tulare Lake naturally
appeared every winter as the southernmost rivers flowing out of
the Sierra Nevada Mountains filled the dry lakebed with rainfall
and melted snow.
Farmers adjacent to the lake also used the water to irrigate
their lands. But the variable shoreline made growing seasons
unpredictable. In response, Pine Flat Dam was built by the U.S.
Army Corps of Engineers to control Kings River flows. The Kings
River is still used extensively for irrigation.
Because the Tulare Lake Basin’s irrigation water does not have an
outlet, agricultural drainage is stored in a series of
evaporation ponds in and near the lakebed, which has been
converted to farm fields. By the 1980s the water drained
into 28 ponds totaling 7,300 acres. Crop production improved in
part due to improved drainage. Today, drainage water from about
44,046 acres of farmland is contained and evaporated from eight
basins encompassing 4,740 acres of evaporation ponds.
France and California face a common challenge of managing
overdraft in intensively exploited aquifers. As of 2018, large
areas of France and California have overexploited groundwater
(see maps below). And both regions have passed landmark
groundwater legislation, the Loi sur l’Eau et les Milieux
Aquatiques (LEMA) of 2006 in France and the Groundwater
Sustainable Management Act (SGMA) of 2014 in California.
This tour ventured through California’s Central
Valley, known as the nation’s breadbasket thanks to an
imported supply of surface water and local groundwater. Covering
about 20,000 square miles through the heart of the state,
the valley provides 25 percent of the nation’s food, including 40
percent of all fruits, nuts and vegetables consumed throughout
the country.
There’s going to be a new governor
in California next year – and a host of challenges both old and
new involving the state’s most vital natural resource, water.
So what should be the next governor’s water priorities?
That was one of the questions put to more than 150 participants
during a wrap-up session at the end of the Water Education
Foundation’s Sept. 20 Water Summit in Sacramento.
We ventured through California’s Central Valley, known as
the nation’s breadbasket thanks to an imported supply of surface
water and local groundwater. Covering about 20,000 square
miles through the heart of the state, the valley provides 25
percent of the nation’s food, including 40 percent of all fruits,
nuts and vegetables consumed throughout the country.
We ventured through California’s Central Valley, known as
the nation’s breadbasket thanks to an imported supply of surface
water and local groundwater. Covering about 20,000 square
miles through the heart of the state, the valley provides 25
percent of the nation’s food, including 40 percent of all fruits,
nuts and vegetables consumed throughout the country.
A new era of groundwater management
began in 2014 with the passage of the Sustainable Groundwater
Management Act (SGMA), which aims for local and regional agencies
to develop and implement sustainable groundwater management
plans with the state as the backstop.
SGMA defines “sustainable groundwater management” as the
“management and use of groundwater in a manner that can be
maintained during the planning and implementation horizon without
causing undesirable results.”
This 25-minute documentary-style DVD, developed in partnership
with the California Department of Water Resources, provides an
excellent overview of climate change and how it is already
affecting California. The DVD also explains what scientists
anticipate in the future related to sea level rise and
precipitation/runoff changes and explores the efforts that are
underway to plan and adapt to climate.
Salt. In a small amount, it’s a gift from nature. But any doctor
will tell you, if you take in too much salt, you’ll start to have
health problems. The same negative effect is happening to land in
the Central Valley. The problem scientists call “salinity” poses
a growing threat to our food supply, our drinking water quality
and our way of life. The problem of salt buildup and potential –
but costly – solutions are highlighted in this 2008 public
television documentary narrated by comedian Paul Rodriguez.
A new look for our most popular product! And it’s the perfect
gift for the water wonk in your life.
Our 24×36 inch California Water Map is widely known for being the
definitive poster that shows the integral role water plays in the
state. On this updated version, it is easier to see California’s
natural waterways and man-made reservoirs and aqueducts
– including federally, state and locally funded
projects – the wild and scenic rivers system, and
natural lakes. The map features beautiful photos of
California’s natural environment, rivers, water projects,
wildlife, and urban and agricultural uses and the
text focuses on key issues: water supply, water use, water
projects, the Delta, wild and scenic rivers and the Colorado
River.
Until the early 1900s, central California’s Tulare Lake naturally
appeared every winter as the southernmost rivers flowing out of
the Sierra Nevada Mountains filled the dry lakebed with rainfall
and melted snow.
In the spring, the shallow lake could be larger in area than Lake
Tahoe. By the end of the hot San Joaquin Valley summer, however,
it could disappear.
