Dhayqah Dam to boost Oman’s water sustainability

A major achievement

A celebration was held on Monday, the 26th of March in the Wilayat of Qurayat to open Wadi Dhayqah Dam with a storing capacity of 100 million cubic metres, built at a cost of RO 43,645,083.
The ceremony was held under the auspices of Sayyid Fatik bin Fahar al Said, in the presence of ministers, shaikhs, dignitaries and others.
Wadi Dhayqah Dam in the Wilayat of Qurayat in Muscat Governorate, which can hold about 35 million cubic meters of water per year, is one of the basic water projects which aim at developing water sector which is accorded utmost priority by Sultan Qaboos.
The dam is also one of the most important and major projects being implemented by the Sultanate to ensure sustainability of water resources. The dam has been designed according to the best engineering techniques and international standards that ensure safety and security.
The project will be one of the major achievements since the early 1970 and will make a qualitative leap in the implementation of water projects and comes within the framework of sustainable development efforts of the Sultanate.
It also comes within the Regional Municipalities and Water Resources Ministry constant keenness to manage, develop and ensure optimum use of the resources. It will contribute in promoting tourism and finding practical ways to limit the hazards of floods and adverse weather conditions which in turn will ensure safety of property and lives.
Ahmed bin Abdullah al Shuhi, Regional Municipalities and Water Resources Minister, said that since the 1980s, the Sultanate's government initiated dam projects to play an important role in the development of water resources and enhancing the water security.
He added that Wadi Dhayqah Dam is a new achievement for the development process in the country as it will be a strategic reservoir for water and will contribute in the development of water resources in the Wilayat of Qurayat and other parts of Muscat Governorate.
The dam aims at benefiting from the flood waters, flowing in wadis that usually enters the sea, and preserving the consumption of water used for irrigation in the villages and areas near the wadi's path and below the dam.
It also aims at providing potable water for the wilayat and serves as a strategic source of water for Muscat Governorate. The dam provides protection for the villages on the sides of the wadi against risks of floods and promotes tourism in the wilayat.
He pointed out that the project includes two dams, one is the main dam and the other is the side dam with a storing lake. The dam is provided with a tower to control water discharge form the lake.
It also includes monitoring network that includes a number of meters connected to a central system for date display and saving. There is also a tunnel inside the main body of the dam for purpose of digging, injection and discharge of the leaked water appropriates.
He added that the second stage of the project includes a developed system for water supplies treatment as about 35 million cubic meter of water per year will be pumped to distribute the water collected at the dam lake, treat them to supply the Wilayat of Qurayat and some wilayats in Muscat Governorate with potable water and water for different uses.
He affirmed the importance of the projects that have been implemented in the different parts of the Sultanate and that such achievements are the fruits of co-operation between citizens and the government.
The opening ceremony included a number of poems and tableaus the highlight the importance of preserving water after which the plaque of the project was unveiled. The chief guest then toured the visitors' centre and the exhibition which includes the documents that cast light on the different aspects of the project through text and visual presentations in Arabic and English. The exhibition has two halls on water, its hydrologic cycle, as well as the major water resources related issues and facts in the Sultanate and the world in general.
When the dam is full, the storing lake will cover 350 hectares of land that extends for 6 km to the upper part of the dam body. The average circumference of the lake when full will be 28 km.
The project includes control rooms for the dam, a tower for water discharge, monitors for the data, control switches for the SCADA system and other world-class systems. The control and monitoring systems also include 39 metres for expansion and shrinking, 100 metres for the temperature and a number of limiters at the end of limiting basin.
The project also includes a tunnel inside the main structure of the dam (3 metres wide and 4 metres high) for control, injection and discharge of the leaked water. It has 122 wells to reduce water pressure on the foundations of the dam, 4 monitors to monitor the movement in the dam body, 4 meters to monitor earthquakes, 18 valves for the control system and 50 monitors for the underground water, in addition to 18 wells to observe the underground reservoirs and underground water level.
To enhance the aesthetic value of the project, many green spaces were provided in the area in between the main and the side dam and in the lower area for the side dams.