small amount and undesirable temporal and special distribution of
precipitation through the country of Iran, causes some deficits
both quantitatively and qualitatively.
Some general statistics of water resources of Iran are gathered here
for more information :
Average precipitation in Iran is a bout 251 mm
annually, which is less than a quarter of the average of the
Iran (1648000 km^ 2 in area) is about 1.1 percent of the
earth land, meanwhile owing 0.34 percent of renewable water
resources of the world.
In 1955, water supplied per capita in Iran was about
6203 cubic meter so ranking this country at 52nd position
among the 100 other countries. In 1990 water supplied per
capita decreased to 2025 cubic meter and it’s position
jumped to 67th. These statistics are expected to be 816cubic
meter and 73rd in year 2025. According to international
criteria, less than 1000 cubic meter of supplied water means
the critical situation.
Regarding statistics, among the neighbour countries, Iran
has the least supplied water per capita.
These worrying figures imply the urgency of situation
and serious attention should be considered to increase the
efficiency of water use. On the other hand, considering the
agricultural part of water consumption which is about 94%,
and reminding the overall application efficiency in this
part which is less than 30%, the additional attention will
be necessary and urgent.
As mentioned above the average precipitation of Iran is 251
mm and when considering the area of the country (1648000
km^2), it will result in 413 billion cubic meter of water
285 billion cubic meter of this amount will be lost due to
evaporation. Adding 7 billion cubic meter of incoming water
to these figures, shows the total amount of 135 billion
cubic meter for whole accessible water. (another figures
says this amount to 110 billion cubic meter).