Induced bank infiltration
Bank infiltration schemes commonly consist of a gallery or a line of boreholes at a short distance from, and parallel to the bank of a surface water body. Pumping of the boreholes lowers the water table adjacent to the river or lake, inducing this water to enter the aquifer system. During the passage of water through the riverbed (or lake bottom) and aquifer, dissolved and suspended contaminants as well as pathogens are removed due to a combination of physical, chemical, and biological processes. Induced bank infiltration systems are typically installed near perennial streams and lakes that are hydraulically connected to an aquifer through the permeable, unconsolidated deposits that form the stream bed or lake bottom.