California’s rich agricultural productivity comes with a price.
The dry climate that provides the almost year-round growing
season also can require heavily irrigated soils. But such
irrigation can also degrade the local water quality.
Two of the state’s most productive farming areas in particular,
the west side of the San Joaquin Valley and parts of the Imperial
Valley in southern California, have poorly drained and naturally
saline soils.
The federal government said Monday it will spend $250 million
over four years on environmental cleanup and restoration work
around a drying Southern California lake that’s fed by the
depleted Colorado River. The future of the Salton Sea — and who
is financially responsible for it — has been a key issue in
discussions over how to stave off a crisis in the Colorado
River. The lake was formed in 1905 when the river overflowed,
creating a resort destination that slowly morphed into an
environmental disaster as water levels receded, exposing
residents to harmful dust and reducing wildlife habitat. The
lake is largely fed by runoff from farms in California’s
Imperial Valley, who use Colorado River water to grow many of
the nation’s winter vegetables as well as feed crops such as
alfalfa.
Looking down at the coast from a hill above the historic L
Ranch at Point Reyes National Seashore, rolling swells appear
on the ocean surface like blue corduroy. The peninsula that
stretches south toward the horizon is almost entirely taken up
by ranchland and weathered buildings. Among them, coyotes stalk
gophers on the dun hillsides, red-tailed hawks perch on fence
posts and a skunk waddles along the road’s asphalt margin.
Those beef and dairy ranches are the focus of a recent water
quality report showing high levels of fecal bacteria downstream
from the cattle, and their manure, in lagoons and beaches
popular with park visitors. The report, which was commissioned
by an environmental group and is disputed by the ranching
industry, is the latest flareup in a decades-long debate over
the ranching that occupies more than one-third of the national
seashore.
Some residents in Planada are calling on county officials to
block a proposed expansion of a dairy. Merced County is
currently in the process of deciding whether to allow the
Hillcrest Dairy just north of the town to expand its herd from
8,050 cows to 9,750 cows. Some residents are saying that the
expansion would make current problems with bad smells and flies
worse, as well as threaten the community’s supply of
groundwater. … The matter is still in the process of review,
and has yet to come before the Board of Supervisors. But it
will ultimately be their call as to whether or not the
expansion with the dairy moves forward.
Over the past five decades, modern agriculture, driven by the
Green Revolution, has achieved unprecedented high yields
through irrigation and the extensive use of synthetic
fertilisers and pesticides. Unfortunately, this strategy of
intensive food production is not currently sustainable because
it deteriorates terrestrial and aquatic ecosystems, depletes
water resources, and contributes towards climate change. To
date, efforts to quantify the environmental footprints of
global production and consumption have covered a wide range of
indicators, including greenhouse gas emissions, water scarcity,
biodiversity, nitrogen pollution, acidification, land
use, and others, but they have largely missed to represent
the environmental pressures exerted by pesticide use.
A pilot program in the Salinas Valley run remotely out of Los Angeles is offering a test case for how California could provide clean drinking water for isolated rural communities plagued by contaminated groundwater that lack the financial means or expertise to connect to a larger water system.
For decades, cannabis has been grown
in California – hidden away in forested groves or surreptitiously
harvested under the glare of high-intensity indoor lamps in
suburban tract homes.
In the past 20 years, however, cannabis — known more widely as
marijuana – has been moving from being a criminal activity to
gaining legitimacy as one of the hundreds of cash crops in the
state’s $46 billion-dollar agriculture industry, first legalized
for medicinal purposes and this year for recreational use.
As part of the historic Colorado
River Delta, the Salton Sea regularly filled and dried for
thousands of years due to its elevation of 237 feet below
sea level.
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 20-minute version of the 2008 public television documentary
Salt of the Earth: Salinity in California’s Central Valley. This
DVD is ideal for showing at community forums and speaking
engagements to help the public understand the complex issues
surrounding the problem of salt build up in the Central Valley
potential – but costly – solutions. Narrated by comedian Paul
Rodriquez.
This Western Water looks at proposed new measures to deal with
the century-old problem of salinity with a special focus on San
Joaquin Valley farms and cities.
This issue of Western Water examines that process. Much
of the information is drawn from discussions that occurred at the
November 2005 Selenium Summit sponsored by the Foundation and the
California Department of Water Resources. At that summit, a
variety of experts presented findings and the latest activities
from areas where selenium is of primary interest.
With irrigation projects that import water, farmers have
transformed millions of acres of land into highly productive
fields and orchards. But the dry climate that provides an almost
year-round farming season can hasten salt build up in soils. The
build-up of salts in poorly drained soils can decrease crop
productivity, and there are links between drainage water from
irrigated fields and harmful impacts on fish and wildlife.
30-minute DVD that traces the history of the U.S. Bureau of
Reclamation and its role in the development of the West. Includes
extensive historic footage of farming and the construction of
dams and other water projects, and discusses historic and modern
day issues.
Water truly has shaped California into the great state it is
today. And if it is water that made California great, it’s the
fight over – and with – water that also makes it so critically
important. In efforts to remap California’s circulatory system,
there have been some critical events that had a profound impact
on California’s water history. These turning points not only
forced a re-evaluation of water, but continue to impact the lives
of every Californian. This 2005 PBS documentary offers a
historical and current look at the major water issues that shaped
the state we know today. Includes a 12-page viewer’s guide with
background information, historic timeline and a teacher’s lesson.
This beautiful 24×36 inch poster, suitable for framing, features
a map of the San Joaquin River. The map text focuses on the San
Joaquin River Restoration Program, which aims to restore flows
and populations of Chinook salmon to the river below Friant Dam
to its confluence with the Merced River. The text discusses the
history of the program, its goals and ongoing challenges with
implementation.
A companion to the Truckee River Basin Map poster, this 24×36
inch poster, suitable for framing, explores the Carson River, and
its link to the Truckee River. The map includes Lahontan Dam and
Reservoir, the Carson Sink, and the farming areas in the basin.
Map text discusses the region’s hydrology and geography, the
Newlands Project, land and water use within the basin and
wetlands. Development of the map was funded by a grant from the
U.S. Bureau of Reclamation Mid-Pacific Region, Lahontan Basin
Area Office.
Southern California’s Imperial Valley is home to California’s
earliest agricultural
drainage success story, one that converted a desert landscape
to an agricultural one, but at the same time created far reaching
consequences.
Evaporation ponds contain agricultural drainage water and are
used when agricultural growers do not have access to rivers for
drainage disposal.
Drainage water is the only source of water in many of these
ponds, resulting in extremely high concentrations of salts.
Concentrations of other trace elements such as selenium are also
elevated in evaporation basins, with a wide degree of variability
among basins.
Such ponds resemble wetland areas that birds use for nesting and
feeding grounds and may pose risks to waterfowl and shorebirds.
Agriculture drainage issues date back to the earliest farming. In
ancient times, farmers let fields stay fallow hoping rain would
flush out salt.
Today, salt and other contaminants continue to cause agricultural
drainage problems, particularly in California. Whether a field is
adequately drained, or saturated with water, the water still has
to be removed.
The disposal of this often-contaminated water continues to be a
challenge in California, with the environmental effects of
selenium and other drainage-related elements changing the course
of drainage planning.
Few regions are as important to California water as the Sacramento-San Joaquin
Delta, where the Sacramento and San Joaquin rivers converge
to discharge into San Francisco Bay.
California’s rich agricultural productivity comes with a price.
The dry climate that provides the almost year-round growing
season also can require heavily irrigated soils. But such
irrigation can degrade the local water quality.
Two of the state’s most productive farming areas in particular,
the west side of the San
Joaquin Valley and parts of the Imperial Valley in Southern
California, have poorly drained and naturally saline soils.
