Toms Geography Revision 3 0.0 / 5 ? GeographyDevelopmentGCSEEdexcel Created by: tbailey20Created on: 24-03-18 14:35 Abstraction Removal of water from rivers, lakes or groundwater for human us 1 of 31 Base flow The part of a river's discharge fed by groundwater 2 of 31 Channel The part of a valley floor occupied by the flowing water of s stream or river 3 of 31 Channel Network The system of tributary streams that join increasingly large river channels in a drainage basin 4 of 31 Dam (& reservoirs) A barrier (made of earth, concrete or stone) built across a valley to interrupt river flow and create a man-made lake (reservoir) to store the water 5 of 31 Discharge The quality of water that passes a given point on a stream or river with-in a given period time. 6 of 31 Drainage bassin The area drained by a river and its tributaries, bounded by a watershed 7 of 31 Erosion The wearing down of the land by water, ice, wind and gravity 8 of 31 Flood When river discharge exceeds river channel capacity and water spills out of the channel onto the floodplain and other areas 9 of 31 Flood plain The part of a valley floor over which a river spreads during seasonal floods 10 of 31 Hydrograph A graph on which variations in a river's discharge are plotted against time 11 of 31 Hydrological cycle The unending movement of water between land, sea and atmosphere 12 of 31 Impermeable Rocks that do not allow water to pass through them 13 of 31 Interlocking spurs A series of ridges projecting out on alternate sides of a valley and around which a river winds its course 14 of 31 Landform A physical feature with recognisable characteristics e.g. waterfalls, meander, formed by specific processes such as erosion and deposition 15 of 31 Levee A bank of sediment formed along the edge of a river channel deposited by flood water 16 of 31 Mass-movement The movement of weathered rock down slope without the direct action of running water 17 of 31 Meander A pronounced bend in the river 18 of 31 Oxbow lake A crescent shaped lake which form when a meander bend is cut off from the main river channel 19 of 31 Precipitation The deposition of moisture on the earth's surface, in the form of free, frost, rain, hail, sleet or snow. 20 of 31 River regime The variation (seasonal pattern) on river discharge over the course of a year 21 of 31 Shortage/ Surplus Areas where water supply is lower / higher that water demand from humans 22 of 31 Stores Places within a system where materials or energy are held for a time 23 of 31 Streamflow The flow of surface water in a well-defines channel 24 of 31 Transfer Flows of water between stored in the hydrological cycle 25 of 31 Valley A linear depression in the landscape formed by erosion usual with a river channel at its lowest point 26 of 31 Velocity (steam) The speed of water flow in the river channel 27 of 31 Water quality A measure of how fit for human consumption water is, Polluted water has a low water quality. 28 of 31 Watershed The dividing line between one drainage basin and another. 29 of 31 Waterfall A river landform created by erosion, where water drops steeply/vertically as it flows over a cliff like feature 30 of 31 Weathering The chemical alteration and physical breakdown of rocks in situ. 31 of 31
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