Bentley > Case Studies > Liaoning Water Mitigates Flood Risks with Dongtaizi Reservoir: A Case Study

Liaoning Water Mitigates Flood Risks with Dongtaizi Reservoir: A Case Study

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Technology Category
  • Sensors - GPS
  • Sensors - Utility Meters
Applicable Industries
  • Cement
  • Construction & Infrastructure
Applicable Functions
  • Maintenance
  • Product Research & Development
Use Cases
  • Digital Twin
  • Leakage & Flood Monitoring
About The Customer
Liaoning Water Conservancy and Hydropower Survey and Design Research Institute was delivering the reservoir design. Based on the potential of a 100- year flood recurrence, the proposed infrastructure is a rockfill dam with an asphalt core wall and a concrete gravity dam. Reaching up to 43.5 meters, the dam will have a total storage capacity of 321 million cubic meters. The reservoir will also supply water for the construction and operation of Linxi Industrial Park, a gas refinery. Lastly, the reservoir will sustainably advance the local economy by providing critical agricultural irrigation and water supply to the areas adjacent to the lower reaches of the river.
The Challenge
Water scarcity and severe flood risks in China have intensified over time, prompting the government to fund water conservation projects, such as reservoirs and dams. The Dongtaizi Reservoir, located in Linxi County within Chifeng, Inner Mongolia, is one of 172 major water conservancy developments outlined in China’s “National 13th Five-Year Plan” and one of 12 key livelihood projects in Inner Mongolia. This large-scale infrastructure is a vital water conservancy undertaking for the prefecture-level city of Chifeng due to the area’s immediate need for severe flood risk mitigation. The expansive location of the Dongtaizi Reservoir necessitated a precise geological survey, as the site’s terrain was complex. Therefore, the design team required a comprehensive understanding of both the rock mass that would support the prospective dam and the ground’s structural plane. In addition to the project’s surveying demands, the infrastructure design was also multifaceted.
The Solution
The reservoir design required collaboration among multiple engineering disciplines, precise excavation drawings, an intuitive geological design, and a detailed dam design. Traditional design methodology would not achieve these results, so Liaoning Water employed Bentley’s building information modeling (BIM) software because of its cooperative design management platform. The team began by using OpenRoads to execute an accurate 3D geological survey of the dam location based on massive drilling and exploration line data. The application’s spatial analysis feature provided an audit of the dam foundation rock mass types, the structural plane, and the area’s block boundaries. To design the complicated ecological fishway and overcome the excavation challenges, they used OpenRoads Designer to create a detailed 3D geological model, which became the foundation for the dam design.
Operational Impact
  • Upon completion, the Dongtaizi Reservoir will mitigate flood risk and supply water to much needed areas within the river basin. Additionally, the precise design of the ecological fishway will restore fish migration and reduce the reservoir’s overall environmental impact. With this innovative design, Liaoning Water is the provincial leader in using BIM software for water conservancy projects. They are using this project as the foundation for the application of BIM software on other infrastructure endeavors and have already implemented corporate 3D collaborative design standards for the company and trained personnel.
Quantitative Benefit
  • Using BIM applications reduced design error by 90%, avoiding design changes and rework during construction.
  • Design efficiency increased by 40% to deliver the engineering design two weeks ahead of schedule.
  • By accurately calculating the project’s cost in the design stage, Liaoning Water lowered the overall project investment.

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