Controlling the water level of a river dam case study


SmartScan25 provides an efficient solution for controlling water level of the Wardha river reservoir from a distance of 40m (131ft) thus preventing draughts and floods to the district of Amravati, India.

Upper Wardha Dam is build up on the Wardha River at a height of 36m (118ft) and 7km (4.35mi) length and situated on the boundary of Amravati and Wardha Districts, India. Controlling the water level in the dam reservoir is essential to prevent the river from flooding these two districts.

The problems

Dams with spillways gates are constructed to store water and to help flood control and energy generation. To date, because of water scarcity it is vital to efficiently operate such water reservoirs to maintain every droop of water.

The municipality of the Amravati district sought an ultrasonic measurement solution to control the water level of the Wardha river concentrated at the upper dam reservoir.

Measuring water level in a dam reservoir can be quite problematic when using ultrasonic level measuring gauge. The sensor is usually installed very high up above the dam's wall. The acoustic interferences in these ranges are many and therefore can cause obstructions to the ultrasonic wave. In addition, the strong water flow to the reservoir creates waves and ripples causing the measurement results to be unstable.

Lastly, this water flow may cause lots of foam to amass in the reservoir which may result inaccurate readings.

The solution

To enhance the control of the water level in the reservoir one SmartScan25 unit was installed 40m' (131ft) above the dam. SmartScan25 is based on a Solid AT's patented technology which enables it to provide accurate measurement results even in long range applications such as the Wardha dam. The SmartScan's sensors work on a relatively low frequency transmission and therefore can effortlessly cope with loss of energy caused by foam and waves. Moreover, SmartScan's advanced software algorithm overcomes acoustic interferences caused by surrounding obstacles in the dam. Since the SmartScan25 is a two-part ultrasonic gauging device its electronics was installed remotely in the dam's control room. The dam's engineers connected the SmartScan to their management system via RS-232 digital connection to obtain continuous measurement results. In addition, the SmartScan was configured to convert these level measurement results to volume values using a 24 points strapping table.


SmartScan25 was installed at the Wardha dam as part of a large management project intended to achieve better control of the Wardha river water flow. The data supplied by the SmartScan provides the dam's engineers the knowledge needed to forecast the reservoir operation schedule and to run an economical water management.

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