"ERG"

Engineering Research Group



Sarez, Rogun, Aral ....


Lake Sarez, deep in the Pamir mountains of Tajikistan, appeared in 1911 when a strong earthquake triggered a massive landslide that, in turn, became a huge dam along the Murghob River, now called the Usoi Dam. The height of the Usoi Dam is about 600 metres.

Since then, the lake has been accumulating water for almost 100 years, which is still continuing.

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Now the lake is 75 km long and as deep as 500 m, and holds an estimated 17 cubic km of water.

At first sight, the lake looks calm and smooth.
However, it is a "dragon in sheep's clothing". Water is a "good servant but a bad master".


sarez calm


The area experiences considerable seismic activity, and scientists fear that part of the right bank may slump into the lake, creating a huge wave that will top over and possibly breach the natural dam.

Such a wave would create a catastrophic flood downstream along the Bartang, Panj and Amu Darya Rivers, perhaps reaching all the way to the Aral Sea.

 

If the Usoi Dam breaks, the natural disaster may hit a few countries, threatening more than six million people inhabiting the valleys of Rivers Panj and Amu Darya and Aral Sea littoral areas. Big cities like Termez, Nukus (Uzbekistan), Chardzhou (renamed as Turmenabat, Turkmenistan) and many other populated areas in the valley of River Panj (Tajikistan and Afghanistan) may be destroyed.

 

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The idea that our group is suggesting the following:

 

We want to urge the world community to take measures aimed at preventing the possible natural disaster. The implementation of these measures will help to resolve numerous regional problems, including energy, water, ecologic, social and humanitarian problems.

 

Many humanitarian organizations have already attempted to resolve this problem. Currently, Central Asian governments, as well as the World Bank and the UN, are monitoring the dam closely, and have proposed gradually lowering the lake level as a preventive measure.

However, all of them are making efforts separately and uncoordinatedly. They are in disagreement over many issues - who will fund, what measures need to be taken etc.

 

At present, the huge Rogun hydropower station is under construction at River Vakhsh in Tajikistan. This project is attracting most of the country's financial resources.

 

It is expected to have a 330-metre-tall dam and its reservoir to contain 12.5 billion cu. m. of water which would not reach Turkmenistan, Uzbekistan and the Aral Sea. The station with a design capacity of 3,600 MW is expected to cost $5bn.

 

RogunDam
The scheme of the Rogun Dam on the Vahsh River in Tajikistan

NurekDam
Nurek Dam on the Vahsh River - it is analogue of the future Rogun Dam

However, the Rogun project, whose construction was planned during the period of the USSR, is already leading to serious controversies over the use of transboundary rivers in Central Asia because a significant part of the water which is supposed to flow into the lower reaches of River Amu Darya and later into the Aral Sea will be kept in the Rogun water reservoir.

 

In addition, Tajikistan's investment of all of its resources, including funds, into the construction of the Rogun hydropower station is distracting the country from the problem of Lake Sarez and postponing its resolution for an uncertain period or, perhaps, for decades. But the breach of the Usoi Dam or the water overflow because of landslide may take place during this period, causing catastrophic consequences for the region as a whole.

 

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   Videocollage (7 MB)

 

We are putting forward the facts proving the need to give more priority to the problem of Lake Sarez than the construction of the Rogun hydropower station.

The following are the facts:

 

 

1.     It would take five to six years to fill the giant Rogun reservoir, thus reducing water flows down the main arterial rivers. We instead propose using the water that has accumulated in the Pamir Mountains over the last century. Rough projections suggest lowering the level of Lake Sarez by 70-100 meters will allow up to 6-8 billion cu. m. of water to be released into the Aral Sea basin. And still the dying Aral Sea would get additional water over several years.

 

2.     There are many advantages of reducing the water level at Lake Sarez: it will ease pressure on the Usoi Dam and minimize the risk of its collapse with possible catastrophic flooding; landslide generated floods can be averted that could potentially overtop the dam. With subsequent reinforcement of the Usoi Dam such scenarios can be avoided altogether. On the other hand, the development of the Rogun scheme that entails environmental risks own its own only adds to a web of existing regional problems.

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3.         3.     Следует отметить, что объём водохранилища, в том числе и, так называемый «мёртвый объем», то есть тот объем воды, который никогда не сливается из водохранилища, меняется от высоты плотины в квадратичной зависимости. То есть, при возможном уменьшении высоты плотины в три раза, «мертвый объем» водохранилища уменьшается в 9 раз ! Так что, при рассмотрении варианта строительства на реке Вахш трёх небольших плотин вместо одной высокой при том же перепаде высот, а, следовательно, и такой же суммарной мощности ГЭС, удастся уменьшить общий «мертвый объём» в 3 раза.
Мёртвый объём обычно составляет не менее половины всего объёма водохранилища. Для примера, при полном объёме Нурекского водохранилища около 10.5 млрд. кубметров воды его мёртвый объём составляет чуть менее 6 млрд. кубметров, то есть около 60%.

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4.     The ecological balance around Lake Sarez has fully stabilized over a period of hundred years. The Rogun dam, if and when completed, is yet to endure this test of nature. Тhе consequences to future generations cannot be ignored.

 

5.     Even if completed in time, the Rogun hydroelectric power station is likely to give electricity to homes in 3-4 years at best, as it will consume its own power in this initial phase. The capital investment return is, according to some estimates, expected after 30 years of operation. Filling up the Rogun reservoir, over many years, also means less power generation by the cascade of hydro stations on the lower Vakhsh River. The proposed Sarez project, in comparison, requires little initial investment to be energy self-reliant from first days. Building a small hydropower plant would allow the generated energy to be used for the further development of infrastructure and capacity increases. Rough calculations suggest the force of 8 billion tons of water falling from the 400-500 meter height (tentative projections for the Sarez scheme) could produce at least 7-10 billion MW-h of electricity.

 

6.     Retargeting the funds intended for the Rogun project and joint use of the resources allocated by various institutions to deal with the risk posed by Lake Sarez; this will focus efforts on reducing the threat.

 

7.     The parallel development of Tajikistan's mountainous areas, with a special attention to building up the mining and tourism industries.

 

8.     In case of a possible breach in the Usoy dam, costs to eliminate the consequences of this disaster would be far higher than the construction of the Rogun hydropower station and its future profits. Social and humanitarian consequences would not be easy to assess.

 

9.     The Sarez project would attract more labour resources in Tajikistan because there would be the need to develop infrastructure in underdeveloped regions in Tajikistan (the construction of roads, power lines and other communications) and this would help employment and create jobs, easing social tension.

 

10.     An integrated approach to solving regional problems; avoiding confrontation over differing interests.

 

No person, group or single Central Asian country is, however, able to carry out such a project on its own. It requires the collective and coordinated efforts of the whole region, including Kazakhstan, Uzbekistan, Turkmenistan, Tajikistan, Afghanistan, as well as Russia and the international community.

The ERG group is based in Tashkent and has members in Uzbekistan, Kazakhstan, Russia, the UK, the Czech Republic and the USA. The group staff include well-experienced engineers, designers and journalists and plans to invite TV channels, including the National Geographic, the BBC and Discovery to cooperate over the project. Specifically, the plan is to make a documentary on the project jointly with one of the TV Channels.

 



German Treshchalov, head of the Engineering and Research Group
May 23, 2009



The attachments include video files, photos and schemes of the following events:


Malpasset arch dam disaster (France) - 1959
421 people died. The damage amounted to a total of $68 million

The Vajont disaster (Italy) - 1963
The landslide in Vajont reservoir, numbers of villages destroyed, about 2.5 th people died.

The Teton dyke breach (Idaho, the USA) - 1976
The town of Rexburg was flooded, 11 people died, the damaged was estimated at 1bn dollars.

Mud slide and flood (Venezuela) - 1999
The town of Vargas was destroyed, 30,000 people died as a result and the damage cost was estimated at 3.2bn dollars

Flood in Krasnodar Territory (Russia) - 2002
several people died

Tsunami in Indonesia, Taiwan and Sri-Lanka - 2004
About 400,000 people died, the damage cost over 10bn dollars

Flood in St. Georgia (Utah, the USA) - 2005
Dozens of houses destroyed, the damage cost at 150m dollars

Hurricane "Katrina" (Louisiana, the USA) - 2005
New Orleans city was flooded, thousands houses destroyed, about 2000 people died, the damaged estimated at 100 bn dollars

Dam crashed in Indonezia - 2009
60 people died, the damage cost over 85m dollars

The forecast of flood if the Usoi Dam breaks or water tops the dam - the year is unknown.
The countries that will be in the possible disaster area include Tajikistan, Afghanistan, Uzbekistan and Turkmenistan. About six million people live in the possible disaster zone.

Video clips used taken from
National Geographic, Wild, Discovery, Zvezda, NTV, Uzbekiston, RBC, MIR

Pictures borrowed from the following sources and websites:
NASA, Google, Ferghana.ru, Wikipedia, www.pamir.ucoz.com, http://www.land-man.net



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