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

Stores fresh water, which can be used for:

  Sustaining growing populations

  Supporting new industries

  Facilitating the needs of increased agricultural production

  Creates jobs

  Hard bottom layer with low permeability. 
  The sides and the bed of the reservoir must 
consist of basement rock with low permeability. If there are large water bypaths, the dam cannot store water effectively.

  Presence of a porous layer / aquifer for water storage

  Presence of shallow groundwaters with high fluidity to keep water from stagnating

HIES engineers, scientists, construction management, international management and technicians have the ability to understand complex environmental problems and routinely work with customers and regulators to help solve complex environmental issues.