“Taishir-Altai” project introduction�2011

 

Altai city water supply project “TAISHIR-ALTAI”

1. Background

The present water source for Altai city does not meet potable water standards and the ratio between calcium and magnesium is improper and has adverse impact on human health. Water resources for the city are not sufficient to supply the current demand. Previous underground water investigations have not found water sources with adequate resources that satisfy water quality standards. In order to solve all these issues, the project proposed to bring water to Altai city from the reservoir of the existing Taishir Hydro-power plant by means of 45 to50 km long pipeline.

2. Present situation

Water demand for Altai city is 2000 m3/day or 23 liters per second. The city is presently being supplied with the water with only half this amount - 10 to 12 liters per second - and under strict time limitations. In Altai city, the price for 1 liter water is 1 tugrug per liter for the offices, 1.5 tugrugs for water distribution points and 3 tugrugs for water that is distributed by the trucks. This tariff is 5 times higher than the water tariff in Ulaanbaatar City. In order words, Altai residents are paying a high price for poor quality water. A 2010 design study, “Improvement and Rehabilitation of Water Supply System in Altai City” finance by Asian Development Bank, estimated that daily water demand would be 2,376 m3/day or 27.5 l/sec in 2020 and 4,493 m3/day or 52 l/sec in 2040, based on Altai City future development trends, industrial and service sector trends. Therefore, it seems that 15.5 l/sec water in 2020 and 40 l/sec water in 2040 will be needed additionally.

Project description

Water intake structure of Taishir Hydro-Power Plant is proposed to be a coastal water intake structure with a ductile iron pipeline and 3 booster pump stations required to convey water to Altai. First booster pump station will operate on the reserve circulation method. First pump station will be built at GK 6+00 point, second one will be at GK 166+00 and third one will be at GK 326+00. Double pipelines from the water intake structure to the first pump station will be 1.2 km pipeline of 300 mm diameter and the remaining pipeline to two existing water tanks of 1000 cubic meters will be 47.4 km of 250 mm diameter pipe, for a total of 48 km. 3 to 4 water distribution points are planned for the farms along the pipeline route. There will be two pumps in each pump station, one operating and one reserve. The second and third pump stations will include a 25.0 cubic meters, connection tank and the maximum pipeline pressure will be 25 bars.

“TAISHIR-ALTAI” Project

Location map of the project  

 

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“Taishir-Altai” project introduction�2011

 

Water reservoir bank, altitude – 1698 m

At 1.5 km, altitude – 1814 m

At 5.2 km, altitude – 1865 m

At 6.7 km, altitude – 1867 m

Khar tolgoin well at 18.7 km, altitude – 1833 m

At 26.9 km, altitude – 1864 m

“Taishir-Altai” project introduction�2011

 

At 33.3 km, altitude – 2024 m Existing water reservoir, altitude – 2222 m

At 40.3 km, altitude – 2057 m Altai city

5. Conclusion

1. The project will be a key solution to Altai city water supply which is one of the main problems facing Altai city and thereupon the public health issues will be solved. Moreover, the light and heavy industries, agricultural and tour sectors will be developed along with the water supply system.

2. The total water consumption of Altai city and along the pipeline will be 60 l/sec. The 60 l/sec flow is equal to 0.5% of the yearly average flow (12 m3/sec) of Zavkhan River and 0.47% of the reservoir useful volume and 0.34% of the reservoir total volume. In order words, water supplied to Altai city will barely affect the water amount in the reservoir.

3. The project will be financed under the concession agreement involving international and domestic investors. Foreign investors already expressed their interests in the project and thus, the feasibility study shall be started as earlier as possible. We are planning to start the construction of the project within 2011.