Wireless Monitoring of Concrete Dams in Asia++

COUNTRY:
Asia

PROJECT TYPE:
Dam Monitoring

SECTOR:
Structural Health Monitoring

MAIN PRODUCT:
Loadsensing

Challenge

The Assyakirin Concrete Dam is located in Sarawak, Malaysia, a region whose economy has expanded to oil palm, forest plantations and agriculture, among other things. It collects rainwater during the monsoon season and releases it when the water level in the river is not sufficient to supply raw water to the water treatment plants and agricultural areas. The concrete dam had a monitoring system in the past but it was vandalized and this triggered the need to update and automate the monitoring of the reservoir level and slope stability of the saddle dam.

Meanwhile, the Shihmen Concrete Dam forms the Shihmen Reservoir, Taiwan’s third largest artificial lake which provides irrigation, flood control, hydroelectricity and domestic water supply for more than three million people in northern Taiwan. The concrete dam needed to automate the piezometer monitoring around the dam to have real-time data on the pore water pressure of the soil surrounding the dam structure.

Solution

Together with Worldsensing’s partner Soil Instruments Malaysia, robust Loadsensing vibrating wire data nodes wirelessly monitor piezometers on the Assyakirin saddle dam while other nodes are connected to ultrasonic water level sensors from the dam wall.

In conjunction with Sanlien Technology Corp., Loadsensing data nodes are connected to piezometers installed around the Shihmen concrete dam structure.

Loadsensing uses LoRa: a long-range, low-power wireless technology used by IoT networks worldwide. The system’s low-power components remain on sleep mode and are only activated at predetermined times thus extending the lifespan of the batteries for up to 8 years.

Benefits

Real-time, wireless monitoring of the concrete dams enables proper management of the water level in the reservoirs which in turn minimizes the risks of flooding, ensures safety of the citizens, supports the agriculture and protects the livelihood in the surrounding areas. The wireless data nodes, which are part of Loadsensing, the leading wireless monitoring system, also significantly reduce the costs for monitoring and their robust design and strong radio signal allow for the data nodes to be covered and protected from vandalism and harsh weather elements.

Loadsensing, the wireless monitoring system was installed on several dams in Asia to monitor not only the stability of the concrete dam structure but also the pore water pressure and other parameters in the surrounding areas.

Advantages

  • Real-time, wireless monitoring of sensors installed within the dam structure, around the walls and surrounding areas
  • Real-time pore water pressure monitoring
  • Compatibility with various types of sensors (piezometers, ultrasonic water level sensors etc.)
  • Minimal maintenance required for the low-power wireless data nodes
  • Strong radio signals in spite of being covered to protect from potential vandalism
  • Robust design which allows the data nodes to be installed in harsh environments

Wireless Monitoring of Concrete Dams in Asia

Download Success Story

Loadsensing vibrating wire nodes

Shihmen Dam in Taiwan

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