This International Standard specifies a method for determining the constant-head water flow capacity within
the plane of a geotextile or geotextile-related product.
The test report is judged in conjunction with the long-term compressive creep behaviour in order to assess the
long-term flow capacity.
BS EN ISO 12958:2010 history
2020BS EN ISO 12958-2:2020 Geotextiles and geotextile-related products. Determination of water flow capacity in their plane. Performance test
2010BS EN ISO 12958:2010 Geotextiles and geotextile-related products - Determination of water flow capacity in their plane
1999BS EN ISO 12958:1999 Geotextiles and geotextile-related products - Determination of water flow capacity in their plane
1990BS 6906-7:1990 Methods of test for geotextiles - Determination of in-plane waterflow
1989BS 6906-3:1989 Methods of test for geotextiles - Determination of water flow normal to the plane of the geotextile under a constant head