rhettara (used in Morocco)

syn. foggara; qanat; kanat; karez (used in Baluchistan)

Subsurface gallery for water supply starting from below the water table and sloping downwards to the ground surface with a gradient flatter than both the water table and the ground surface.



UNESCO/WMO International Glossary of Hydrology (2nd revised ed., 1992)

Posted on February 24, 2014 .