Dams are carefully designed with different layers and drainage systems to control the movement of water through the structure. These systems help reduce seepage pressure and protect the dam’s stability.

 Dams are carefully designed with different layers and drainage systems to control the movement of water through the structure. These systems help reduce seepage pressure and protect the dam’s stability.

The impervious core acts as a barrier that limits water flow, while filter zones control the movement of fine soil particles. The rockfill shell provides strength and stability, while the drainage zone collects seepage water and safely directs it toward the toe drain outlet.

Proper seepage control is essential for maintaining the safety, stability, and long term performance of an earthfill or rockfill dam.