Lar Dam

Infobox_Dam
dam_name= Lar Dam


caption=
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crosses= Haraz River
reservoir= 960 Mm³
locale= Larijan, Amol, Iran
maint=
length= 1,150 m
height= 105 m
width= 800 m
began= 1974
open= 1982
closed=
bridge_carries=
bridge_width= 13 m
bridge_clearance=
bridge_traffic=
bridge_toll=
bridge_id=
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coordinates= coord|35|53|17|N|52|00|36|E|
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Lar Dam (Persian: سد لار "sad-de lār") is a dam located in foot of Mount Damavand. It is one of the main sources of water for Tehran metropolitan region.

Construction

In the wake of the Tehran's water need increase, study and construction phasesof an earth dam over the "Lar river", in northeast of the city, on the elevatedheights of the "Kalanbasteh" mountain, on the slope of Mount Damavand, in anarea called Polour, at kilometer 65 of the Haraz Road (between Tehran andthe city of Amol) started in 1974. The dam's construction work ended in 1981and it started operation in 1984.

One of the aims for building the Lar dam was to supply part of Tehran'sdrinking water need; it was not possible then to operate the dam at itsnominal capacity however, because of water seepage problem.Water stored in the dam's reservoir is transferred to the "Kalan" and "Lavark"power plants, a distance of 3 kilometers from the Latyan Dam's reservoir,through the 20 kilometer long "Kalan" tunnel (3 meters in size).After electricity generation, the water joins and feeds the Latyan dam'sreservoir.

Uncontrolled growth and expansion of Tehran created such a situation thatthe existing water resources, ie, Karaj, Latyan and Lar dams and the deepwells, which were supposed to be exploited only in the mounts of peak waterconsumption, were no longer capable of meeting the city's water demand, soinevitable abstraction from ground resources started to increase in a mannerthat at present situation, the quantity of drilled deep wells has amounted to230 rings. In fact, in 1997, 1998, 1999 and 2000, it had been orderlyabstracted, 317, 289, 374 and 357 Mm³ of water from groundwaterresources of the city. [http://www.edu.joensuu.fi/eno/documents/global2.pdf#search=%22%22Lar%20Dam%22%22]

The Lake

This lake is at a distance of 84 km from Tehran and due to its proximity to Mount Damavand experiences a cool and pleasant climate as well as beautiful landscapes. The lake provides the scope for water sports such as swimming and skiing.

Location in Central Alborz

External links

* [http://www.soil-water.com/english/dams/Lar.htm Profile at soil-water.com]
* [http://www.fao.org/docrep/005/C3405E/C3405E03.htm FAO Report]
* [http://www.isl-ingenierie.fr/refpages/en/pages/refa1r5.htm Project]