Resilience measure: Seepage barrier

definition

Seepage barriers are constructed in order to control and mitigate the subsurface flow, or seepage of water. Depending on the method employed, they are constructed using soil and bentonite, cement and bentonite, concrete, still sheets, balanced stable cement grout, or chemical grout. The final permeability measuring achieved might be less than 10-5 cm/s. Several methods are available to form cut-off walls or barriers including steel sheet-piling, slurry trench walls, concrete diaphragm walls, bored pile walls, grout barriers, mix-in-place barriers, artificial ground freezing etc (European Union, European Commission, accessed on Sept. 2016).

Co-benefits and impacts

Seepage barriers enable the subsurface storage of water which can be utilised for irrigation or water supply through pumping systems. Additionally, they can prevent subsurface coastal intrusion and eventually salinization of subsurface water in case they are constructed in a sedimentary basin, near the coastline.

Related Links

Approaches (Show all)

Protection




Time scales (Show all)

Medium term

Synonym of Resilience Measures (Show all)

Cut off wall

Measure types (Show all)

Engineering




Last modified: Sept. 14, 2016, 9:10 a.m.