Mosul Dam ADAS Monitoring System
Dam monitoring data-acquisition systems are unique because of the many types of measurements they are required to collect. Our systems from Campbell Scientific Inc. can measure everything from water level and flow to strain and vibration, as well as a variety of other parameters. In addition to real-time data measurement, these systems will alert you of changes in factors such as water level, load, pressure, and tilt if they move beyond acceptable ranges. These systems are rugged, low power, and adaptable to the harshest, most remote environments.
Mosul Dam -- Iraq's largest dam and the fourth largest dam in the Middle East -- is located along the Tigris River some 250 miles from the country's capital of Baghdad. Since the operation of this dam in 1986, it is suffering from seepage problems in the foundation of the dam due to the dissolution of gypsum and anhydrite layers under the foundation. This phenomenon has raised concern about the safety of the dam. Studies done during the recent years showed that grouting works can only be considered as a temporary solution at its best. The Mosul Dam is a 113 m (371 ft) tall and 3.4 km (2.1 mi) long earth-fill embankment type with a clay core. The width of the crest is 10 m (33 ft.). At an elevation of 330 m (1,080 ft.) above sea level and throughout its 33-year history it has continued to provide water supply, irrigation, flood control, and hydropower for the people of Iraq. It is a well-designed and well-constructed dam that is unique in that it requires continuous maintenance grouting operations due to the water-soluble geology under the dam.
The engineers building Mosul Dam recognized it would require a grout curtain (a mixture of cement, bentonite clay and water used to fill in the foundations' cracks and voids with a more stable material) to minimize the passage of water through the foundation. They constructed a grouting gallery at the base of the dam to reduce the challenges faced during the construction of the grout curtain and the required daily maintenance grouting. More than 700 instruments have been installed/replaced on the dam. Over 400 of these instruments are automated so near real-time measurements of the dam can be monitored for changes that inform the MoWR's dam safety professionals where to conduct future maintenance grouting.
Hundreds of sensors now monitor the dam and inform officials of vulnerabilities. The contractor selected Campbell Scientific and its partner in Iraq (Al-Worod Al-Dania Engineering Systems Co. ), to provide hardware; software and services for the CR6-based Automated Data-Acquisition System (ADAS). Al-Worod Al-Dania Engineering Systems will provides during next period all the technical support including update design, programming, new installation, and validation services, and was on site for commissioning of the systems and training of operations personnel.