Home Archived April 13, 2016

U.S. Geological Survey

Maps, Imagery, and Publications Hazards Newsroom Education Jobs Partnerships Library About USGS Social Media

USGS Newsroom

USGS Newsroom  

Released: 10/2/1995

Contact Information:
U.S. Department of the Interior, U.S. Geological Survey
Office of Communication
119 National Center
Reston, VA 20192
Pat Jorgenson 1-click interview
Phone: 415-329-4000

Land subsidence, a potential geological hazard throughout most of California’s valleys, is the subject of a two-day symposium in Sacramento, Calif., that will honor one of the pioneers in California geology and groundwater studies.

The "Joseph F. Poland Symposium on Land Subsidence," Oct. 4-5, at the Hyatt Regency Hotel in downtown Sacramento, is named in honor of the late Joseph Poland, a U.S. Geological Survey geologist who was the author of some of the most definitive studies done on land subsidence in California and other parts of the world.

The Poland symposium is part of this year’s annual meeting of the Association of Engineering Geologists and the Groundwater Resources Association of California, Oct. 2-8 at the Hyatt Regency.

Land subsidence, which results from the withdrawal of oil, natural gas or water, is responsible for damage to buildings, canals and other structures, according to USGS geologists and hydrologists who are following in Poland’s steps at that agency.

"Joe Poland was one of the pioneer investigators of land subsidence caused by pumping of groundwater in California," said Tom Holzer, one of the USGS scientists who was mentored by Poland, and who is carrying on some of the scientific subsidence investigations that Poland began. "Beginning in 1941, he (Poland) published a series of studies that clarified the mechanism of land subsidence and that enabled his students to develop methods to predict land subsidence. These methods are now used throughout the world."

Holzer will present one of the opening papers in the symposium. Other presenters represent state and county officials concerned with subsidence, and engineers and geologists from the private sector, as well as other USGS scientists.

(Editors: Reporters may attend any or all of the AEG/GRA sessions. See attached schedule of Poland Symposium.)

The USGS serves the nation by providing reliable scientific information to describe and understand the Earth; minimize loss of life and property from natural disasters; manage water, biological, energy, and mineral resources; and enhance and protect our quality of life.

Subscribe to receive the latest USGS news releases.

**** www.usgs.gov ****

Links and contacts within this release are valid at the time of publication.


Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.usgs.gov/newsroom/article.asp?ID=1380
Page Contact Information: Ask USGS
Page Last Modified: 10/18/2005 11:05:52 AM