A subsurface dam is a system which
stores additional natural groundwater by means of a “cut-off wall” also called a dam body. It is set up across a groundwater channel which can include aquifers, underground river systems, or a subsurface valley.
Increases groundwater volume without disturbing the surface environment
Less evaporation than surface dams
High water quality
Stable &secure: ground acts as a reinforcement
Short construction period