Trenches

 

Rainwater harvesting is being increasingly used to collect precipitation water. The ideas of trenches is to obstruct surface runoff from catchments and concentrate the water to be infiltrated. The collected rainwater can be reacharged thorugh trenches, ditches and pits. These structures are easy to built and maintain and very adaptable.

Typical system capacity scale Family to Village (10²-10³ m³/a)
Geology  Unconfined aquifers.
Topography Rural areas with gently slopes.
Soils Sandy soils.
Water source Rain water.
Pre-treatment None.
MAR main objective Strategic water storage.
Cost Low.

Advantages and disadvantages of the system (adapted from IGRAC, 2007):

Advantages

  • Low cost and simple design.
  • Prevention of soil erosion.

Limitations

  • Water quality might be problematic (fertilizer).
  • Relatively small infiltration quantities.

Case studies

Further information

References

  • IGRAC. (2007). Artificial Recharge of Groundwater in the World.
  • DEMEAU. (2014). Characterization of European managed aquifer recharge (MAR) sites – Analysis.