USGA Press Conference on Groundwater
Land Subsidence in the Valley
groundwater pumping from San Joaquin Valley aquifers is increasing the rate of
land subsidence, or sinking, that could result in serious operational and
structural challenges and repairs to water infrastructure, according to a new
report by the U.S. Geological Survey.
This photo shows the approximate location of
maximum subsidence in
the United States,
identified by research efforts of Dr. Joseph F. Poland
(pictured). The site is in the San Joaquin Valley
southwest of Mendota,
on pole show approximate altitude of land
surface in 1925,
1955, and 1977.
subsidence is reducing the capacity of the Delta-Mendota Canal, the California
Aqueduct, and other canals that transport floodwater and deliver water to
agriculture, cities, industry and wildlife refuges, potentially causing damage
and requiring expensive repairs.
public agencies and resource managers minimize risk and damage to California’s
infrastructure, the USGS is studying and providing information on groundwater
conditions and land subsidence in the San Joaquin Valley.
A press conference about the release of a scientific report and results of a study on
subsidence in California’s San Joaquin Valley will be held at 10:00 a.m. on
Thursday, November 21, 2013 at the U.S.
Geological Survey, Modoc Hall, Willow Conference Room 1, 3020 State University Drive East,
Following the conference will be a site visit and photo opportunity at 2:00 p.m. at
Delta-Mendota Canal, south of Los Banos.
Michelle Sneed, USGS Hydrologist and lead report
Eric Reichard, USGS California Water
Science Center Director
Richard Woodley, U.S. Bureau of
Reclamation Assistant Regional Director
Labels: Groundwater Subsidence in California, Land Subsidence risks water infrastructure, San Joaquin Valley land subsidence, USGA Press Conference in Sacramento