Record levels of subsidence recorded in the Iranian metropolis Teheran, with a loss of a good 25 centimeters per year.
It is a very disturbing situation that the capital of Iran Teheran lives. The Middle Eastern metropolis is literally "sinking" under its own weight, according to a research signed by GFZ German Research Center for Geosciences in Potsdam. A series of satellite surveys allowed the experts to measure the subsidence phenomenon in the area of the Iranian capital from 2003 to 2017, detecting, in some areas, a 25 centimeter lowering of the land per year while other areas, where the situation appears less severe, there is a subsidence of five centimeters in the same period.
But what is the origin of the subsidence of the Tehran plain? According to the researchers, the rapid population growth in the area, the effects of increasingly rapid industrial development and above all the increasingly frequent water supply interventions are literally running out of groundwater causing a collapse of the land. There are as many as 32,000 wells built in the last half century in Tehran; structures that capture the water of the subsoil bringing it to over eight and a half million inhabitants. According to the experts, the situation is serious but not irreparable; however, serious interventions of rationalization of groundwater and greater care of the subsoil of the city are urgently needed.