Linear drainage refers to systems that drain along their entire length, rather than at one particular point, as a gully does. Most are variations on the theme of an enclosed channel, typically with a u-shaped cross-section and some form of grating over the top. There is an enormous range...
Water can be abstracted by a drain or infiltration gallery laid inside the dam during construction, either connected to a pipe though the dam, allowing flow by gravity to the point of use, or with a shallow well excavated to intersect the gallery [80]. Water can also be collected by shall...