A map of Qatar National Utility Corridor from Ras Laffan to Ras Abu Fontas.
BY MOHAMMAD SHOEB
DOHA: The cost of the project to build over 20 huge reservoirs at five strategic sites, is likely to overrun by up to 15 percent from the initial estimates of QR11bn ($3bn), a senior official of Qatar General Electricity and Water Corporation (Kahramaa) said yesterday.
This could be due to increasing cost of raw materials, including sand, cement, bitumen, said Engineer Mohammed Salme Al Mansoori (pictured), Manager, Water Projects Department, Technical Affairs at Kahramaa. Al Mansoori, also a member of the Committee for Primary Materials at the Ministry of
Economy and Trade responsible for monitoring prices of construction materials, said: “As a lot of big projects, including those of Qatar Rail and Ashghal, are going on simultaneously, keeping prices under control will be very challenging. So a rise in prices is expected to continue until 2017.”
Kahramaa is to build four to five reservoirs in Umm Birka, Umm Slal, Rawdat Rashed, Abu Nakla and Umm Thumama, and they will be adjacent to Qatar National Utility Corridor from Ras Laffan to Ras Abu Fontas.
Both areas, which house most of water desalination plants, will be connected with a network
of about 470km long pipelines from generation sources to reservoirs and an additional 100km of new transmission mains (total 570km). The diameter of these pipelines will be up to 1.6m.
“The project is the first of its kind in the world, which will have the world’s largest man-made reservoirs providing water security in case of emergency in the Arabian Gulf,” said Al Mansoori.
To maximise supply security, reservoir sites are spread along the corridor, using it to feed water to each other and into transmission.
Spreading them out also allows water to pass into transmission lines at various locations, and the use of the existing transmission system with minimum modification.
The facility will enable to store nearly 2,300 million gallons of water. “We are in the final stage of awarding contracts for pipelines by this month-end, followed by the tendering of other ackages for the construction of reservoirs and pumping stations,” he said.
The project is in response to the huge increase in water demand in the country as it undergoes an infrastructure and development transformation. It will help enhance Qatar’s treated water storage capacity from the current 2.7 days to up to seven at normal supply, equivalent of 30 days of emergency storage.
Qatar has the production capacity of 325m gallons per day (mgpd), and with the commissioning of a new 40mgpd plant, it will have surplus capacity.
Demand for water varies between 210 mgpd and 310 mgpd (depending on the season) and is forecast to go up to 400 mgpd in 2022 and 440 mgpd in 2026.
The reservoirs will be semiburied (six metres underground and six above) rectangular structures (300m long and 150m wide) fully covered, each with a storage capacity of between 86m and 97m gallons. Water quality from the generation source up to the reservoirs will not be changed.
“The reservoirs have been designed to keep the water fit for human consumption. Water will be kept fresh by using circulation pumps and chlorination and supply will comply with local and World Health Organisation standards,” he said. There are about 100 reservoirs with capacity from 6m
to 25m gallons. The total capacity of all of reservoirs put together is 920m gallons. THE PENINSULA