There are three types of free, banned, and critical banned plains, that unfortunately, few plains in Iran are free. In other words, more than 96 percent of the plains in Iran are banned and critical banned. The Varamin plain of Tehran province is critical banned.
The water depths of the wells in Varamin plain have reached to 300
meters, which means that Varamin plain is constantly falling. This
plain is one of the main agricultural regions in Iran, and due
to the population growth over the years there is more pressure on the
groundwater tables that causes some problems. The Iranian Ministry
of Energy intends to transfer the wastewater produced from Tehran city by two
channels to the Varamin plain in order to confronting the subsidence of the
Varamin plain with the aim of compensating groundwater fall.
It is important to note that there is an annual 150 million cubic
meters groundwater fall in Tehran, which about 80 million cubic meters relates
to Varamin plain and 40 million cubic meters relates to Tehran and Shahriar