BAKUN HYDROELECTRIC PLANT

Water Quality Monitoring

Bakun HEP is committed to monitoring water quality in project area for the operations of the project as water quality is crucial to supporting aquatic life thus monitoring it ensures hydro operations are not disruptive. There are total seven (7) water sampling points, with five (5) points within reservoir and two (2) points downstream of reservoir. Besides, a total of four (4) real-time water quality continuous monitoring stations (CMS), with one (1) installed at water intake and three (3) stations downstream of Bakun HEP.

Location of Water Sampling Points

Locality of CMS Stations

Floating Debris Management

Debris and logs scattered across the reservoir pose a significant risk to hydropower operations, potentially obstructing intake mechanisms and causing turbine damage. To address this issue, a debris management plan has been implemented and is executed during the operational phase of the Bakun Hydroelectric Power (HEP). This plan undergoes periodic assessment for continuous enhancement.

In the event of debris accumulation, conventional methods such as physical removal using cranes and manual labour are employed. Additionally, a log boom structure has been constructed around the Bakun HEP Power Intake and Spillway Structures. This log boom, also known as a log fence or log bag, acts as a barrier to capture and retain floating debris in the river, preventing potential damage and blockages to the turbine while ensuring optimal energy availability.

Furthermore, the Bakun HEP features a trash rack at the Power Intake structure, serving as a final measure for debris control at hydraulic structures. The floating debris captured by the trash rack is monitored daily by Dam Safety Unit, and manual clearing is conducted as needed upon the observation of a substantial debris buildup.

Reservoir Debris Control Process Flowchart

The collection and removal of floating debris in the reservoir was established with the scope of area within 15km radius from Bakun HEP. The removal of debris according to agreed methodologies in compliance with regulations and law. The annotation of the zoning and the 15km radius area from Bakun HEP are shown in figure below.