Land subsidence (LS) is a gradual settling or sudden sinking of the Earth's surface owing to subsurface movement of earth materials. More than 80% of the identified LS in the nation is due to our exploitation of underground water (UW). This report illustrates the 3 basic mechanisms by which human influence on UW causes land subsidence: compaction of aquifer systems, dewatering of organic soils, and mass wasting through dissolution and collapse of susceptible earth materials. Also examines the role that water-management groups play in mitigating subsidence damages. Color and B&W photos, maps, and drawings.
This book examines the process of injecting treated wastewater into wells to replenish aquifers, and thereby slow the process of land subsidence, and help to mitigate coastal flooding. It explains how up to fifty percent of sea-level rise may be due to land subsidence, and up to fifty percent of land subsidence may be due to aquifer compaction. The concepts covered discuss replenishing aquifers with clean water to reduce nutrient discharges into out-falled waterways; providing a sustainable supply of groundwater; reducing the rate of land subsidence; and protecting the groundwater from saltwater intrusion. Practical case studies from Virginia and California will be included.
LAND SUBSIDENCE: CASE STUDIES AND CURRENT RESEARCH edited by James W. Borchers. Land Subsidence is a worldwide problem. Under the auspices of the Association of Engineering Geologists, carefully selected experts contributed papers to this comprehensive compendium The contributors, from the United State & 10 other countries include practitioners, researchers, planners & attorneys -- experts that you can depend upon. Current & historically significant research: Innovative theory & monitoring equipment. Case histories describing site exploration & evaluation. Predictive modeling. Damage to infrastructure. Engineering of remedial construction. Topics include: Migration or removal of subsurface fluid such as brine, salt water, hydrocarbons. Hydrocompaction of moisture deficient sediments: debris flow deposits, artificial fill. Oxidation of peat deposits. Collapse of underground ad solution mine voids. Tunneling. Karst terrain. Going beyond engineering geology & hydrology, this timely resource includes insight into political & legal issues. Offers an understanding of the public policy decision making processes related to land subsidence. Property rights & land use. Regulatory issues. Topics critical to consulting engineers, planners, developers, attorneys & geologists. Hardcover. 8 1/2 by 11 inches. Extensive illustrations! 576 pages. ISBN: 0-89863 197-1 Star Publishing Company P.O. Box 68, Belmont, CA 94002 Phone (650) 591-3505; fax (650) 591-3898; email [email protected]
