Yes, you can install a pond liner on a slope, but it requires careful planning and installation to prevent water from leaking or the liner from shifting. When working on a sloped area, start by excavating the pond shape, ensuring that the deeper sections are at the bottom of the slope and gradually shallower areas are positioned higher up. Use a spirit level to ensure the top edges of the pond are even. Water will only fill to the lowest edge, so an uneven excavation can result in a significantly shallower pond than you expected.
When placing the liner, make sure it is securely anchored at the top of the slope to prevent it from sliding down, especially when rain will be flowing over the slope. Use larger stones or boulders to hold the liner in place and provide additional weight at the edges. Consider installing berms or other drainage controls to eliminate the risk of erosion as the water travels downslope, which can carry sediment and pollutants into the pond or even weaken its structural integrity.
