Catchment Hydrology/def


 * Aquifer
 * A permeable layer of rock that can store & transmit groundwater.


 * Avulsion
 * The sudden separation of land and re-attachment to another, especially by flooding or a change in the course of a river.


 * Headcut
 * ''Also known as plunge pool
 * Abrupt change in elevation in the earth of a channel side.


 * Overland flow
 * Also known as surface, sheet, interrill flow


 * Permeable, permeability
 * (of a material) Allowing substances to pass through it.
 * How easily a substance moves through material; how well connected pore spaces are.


 * Pipeflow
 * Flow through voids in the soil; these may be caused by decaying roots or burrowing animals.


 * Rill
 * A small channel eroded by sheet flow.


 * Thalweg
 * Path of deepest water.


 * Throughflow
 * Downwards flow through subsurface soil.


 * Urban hydrology
 * The study & application of scientific hydrology within urban environments.


 * Water table
 * Top of groundwater, where below it the ground is saturated.