Seepage

The slow movement or percolation of water through soil or rock. Movement of water through soil without formation of definite channels. The movement of water into and through the soil from unlined canals, ditches, and water storage facilities. The slow movement or percolation of water through small cracks, pores, interstices, etc., from an embankment, abutment, or foundation.

The interstitial movement of water that may take place through a dam, its foundation, or abutments.

The act or process involving the slow movement of water or other fluid through a porous material such as soil or rock.

In hydrologic terms, the interstitial movement of water that may take place through a dam, its foundation, or abutments.