Human Depedence Project
This Is Subsidence
2 Main Issues Of Subsidence
The Neggative Effects On The Enviorment
Subsidence is a global problem, and the increasing of land and water resources threatens to exacerbate existing land-subsidence problems and initiate new ones.
Main Regions in or nearest to North America affected by Subsidence
Mexico City, where long-term extraction of groundwater has caused significant land subsidence and associated aquifer-system compaction, which has damaged colonial-era buildings, buckled highways, and disrupted water supply and waste-water drainage. Land subsidence in California, due to groundwater withdrawal. Fissures near Lucerne Lake (dry) in San Bernardino County, Mojave Desert, California.
What Wildlife is most affected by Subsidence
How are Wildlife affected by Subsidence
Does Subsidence affect our lives in in League City?
The greater Houston area, possibly more than any other metropolitan area in the United States, has been adversely affected by land subsidence. Extensive subsidence, caused mainly by ground-water pumping but also by oil and gas extraction, has increased the frequency of flooding, caused extensive damage to industrial and transportation infrastructure, motivated major in- vestments in levees, reservoirs, and surface-water distribution facili- ties, and caused substantial loss of wetland habitat. http://pubs.usgs.gov/circ/circ1182/pdf/07Houston.pdf
Are people affected by Subsidence?
Who or What causes Subcidence to occur?
Land subsidence occurs when large amounts of groundwater have been withdrawn from certain types of rocks, such as fine-grained sediments. The rock compacts because the water is partly responsible for holding the ground up. When the water is withdrawn, the rocks falls in on itself. You may not notice land subsidence too much because it can occur over large areas rather than in a small spot, like a sinkhole.