If you encounter a liner that bulges or bubbles up from underneath while performing a pond clean-out, follow these steps:
Assess the Situation and Work Around the Bubble
- The bulge is caused by excessive groundwater pressure beneath the liner.
- When the pond was full, the weight and pressure of the water in the pond held the liner down. After pumping the water out, the reduced weight allows the groundwater to push the liner upward.
- Continue your clean-out while working around the bubble as best as possible.
Complete the Clean-Out
- Proceed with cleaning the pond as planned. Be careful not to damage the liner while working around the raised areas.
- Do not attempt to forcibly push the bubble down, as this could cause damage or displacement of the liner.
Refill the Pond Gradually
- Once the clean-out is complete, begin refilling the pond with water.
- The weight of the water will gradually increase pressure on the liner, which will push the bubble back down into the ground.
Allow Time for the Bubble to Settle
- The process of the bubble settling may take several days as the weight of the water slowly compresses the groundwater beneath the liner.
- Monitor the pond during this period to ensure the liner remains properly aligned.
By understanding that this situation is a natural occurrence caused by groundwater dynamics, you can effectively manage and resolve the issue without compromising the liner or the integrity of the pond.