Downstream Stilling Basin Inspection

Planys conducted underwater visual inspection and bathymetry of the stilling basin at a 40-year-old dam in south India. This dam is one of the projects under the Ministry of Jal Shakti’s important program called Dam Rehabilitation and Improvement Project (DRIP). ROV Orca was deployed for this project.

Scope of Work: The scope of work included underwater inspection and Bathymetry at stilling basin in extremely muddy and turbid waters.

Planys Solution: The inspection was performed using Planys’ ROV Orca equipped with high resolution camera, turbidity module, echo sounder, altimeter and depth sensor.

  1. About 40 anomalies were identified and categorised into minor, moderate and major based on the size of defect that included cracks, surface deformations, pinholes and debonding between layers.
  2. Planys’ proprietary image enhancement algorithm was used to enhance the videos taken in the extremely turbid waters
  3. All anomalies/defects were plotted against geo-tagged CAD drawing of every section on the Planys Analytics Dashboard (PAD) with localised click-to-view video feature.

Images show deployment & site setup of the ROV system during inspection

Images of cavity observed after image enhancement

Figure show downstream contour obtained from bathymetry survey at stilling basin