ساخت و ساز در منطقه مستعد لغزش زمین در منطقه دارآباد تهران - فروردین 1384

تصویر 4

رانش زمین در زلزله های گذشته (البته برخی موارد بدون زمین لرزه نیز پدیده رانش زمین یا زمینلغزش ایجاد میشود)

یا روی تپه ساخته ایم، كه نتیجه چیزی است شبیه این تصویر .. یعنی آنچه كه در منطقه دارآباد شاهد آن خواهیم بود

یا در پای كوه ساخته ایم كه نتیجه ای مطابق این حالت خواهیم داشت.

زمین لغزش در اثر زمین لرزه ای به بزرگای 7.6 در السالوادر

در زیر چند مورد از زمین لغزش ها را مشاهده میكنید...

The Mamayes, Puerto Rico, landslide, 1985. This landslide destroyed 120 houses and killed at least 129 people, the greatest number of casualties from any single landslide in North America. The catastrophic block slide was triggered by a tropical storm that produced extremely heavy rainfall. Contributing factors could also have included sewage directly discharged into the ground in the densely populated area, and a leaking water pipe at the top of the landslide. Photograph by R.W. Jibson, U.S. Geological Survey

Sinkhole at Winter Park Florida-Sinkholes, although not classified as landslides, are another form of ground subsidence that can happen catastrophically. This sinkhole occurred in 1981, in the time span of one day. The city of Winter Park stabilized and sealed the sinkhole, converting it into an urban lake. This form of subsidence occurs when carbonate layers that lie below the surface dissolve. When the weight of the overlying ground becomes too great, or the dissolved area too large, the surface collapses into the void. These features occur in what is known as karst topography which is common in Florida, Kentucky, Missouri, Pennsylvania, and Tennessee and also occurs in many other places around the world. Photograph by A. S. Navoy

La Conchita, California-a small seaside community along Highway 101 south of Santa Barbara. This landslide and debris flow occurred in the spring of 1995. Many people were evacuated because of the slide and the houses nearest the slide were completely destroyed. Fortunately, no one was killed or injured. Photograph by R.L. Schuster, U.S. Geological Survey