Location
Atlanta, GA
Presentation Type
Presentation
Start Date
10-8-2025 10:00 AM
Description
In recent years, many Piano Key Weirs (PKW) have been built around the world. In Vietnam there are more than 18 PKWs in operation to the present. However, during the operation, some experience has been drawn on the design and application conditions. This paper is about the Dak Mi 3 reservoir with a PKW that operated well for more than 4 years until an exceptional flood following typhoons in October 2020, making reservoir fully filled with mud and sand. The result is the PKW became ineffective and the hydropower plant unable to operate. In order to dredge the reservoir and prevent mud deposits again, a part of the PKW was replaced by two deep orifice sluices. The lesson is that using orifice sluices in combination with PKW is an effective solution for sand flush of reservoir in catchment areas sensitive to landslides and under climate changes.
Included in
Piano Key Weir With Orifice Sluice
Atlanta, GA
In recent years, many Piano Key Weirs (PKW) have been built around the world. In Vietnam there are more than 18 PKWs in operation to the present. However, during the operation, some experience has been drawn on the design and application conditions. This paper is about the Dak Mi 3 reservoir with a PKW that operated well for more than 4 years until an exceptional flood following typhoons in October 2020, making reservoir fully filled with mud and sand. The result is the PKW became ineffective and the hydropower plant unable to operate. In order to dredge the reservoir and prevent mud deposits again, a part of the PKW was replaced by two deep orifice sluices. The lesson is that using orifice sluices in combination with PKW is an effective solution for sand flush of reservoir in catchment areas sensitive to landslides and under climate changes.