Abstraction, Removal of water from rivers, lakes or groundwater for human use., Base flow, That part of a river’s discharge fed by groundwater, Channel network, system of tributary streams that join increasingly larger river channels in drainage basin, Dam , A barrier across a valley to interrupt river flow, Reservoir, Man-made lake, Discharge, quantity of water that passes given point on stream/river‐bank , Drainage basin, The area drained by a river and its tributaries, bounded by a watershed., Erosion, The wearing down of the land by water, ice, wind and gravity, Flood, River discharge exceeds river channel capacity, water spills out onto floodplain, Flood plain, That part of a valley floor over which a river spreads during seasonal floods., Hydrograph, A graph on which variations in a river’s discharge are plotted against time., Hydrological cycle, The unending movement of water between land, sea and atmosphere., Impermeable, Rocks that do not allow water to pass through them, Interlocking spurs, A physical feature with recognizable characteristics formed by specific processesformed by specific processes, Levee, Bank of sediment formed along the edge of river deposited by floodwater., Mass‐movement, The movement of weathered rock down slope without direct action of running water., Meander, A pronounced bend in a river, Oxbow lake, Crescent shaped lake which form when meander bend is cut off from main river channel., River regime, The variation (seasonal pattern) in river discharge over the course of a year., Shortage / surplus, Areas where water supply is lower / higher than water demand from humans, Store, Places within a system where materials or energy are held for a time., Streamflow, The flow of surface water in a well‐defined channel., Transfer , Flows of water between stores in the hydrological cycle., Valley, A linear depression in the landscape formed by erosion, usually at river's lowest point., Velocity (stream), The speed of water flow in the river channel., Water quality, Measure of how fit for human consumption water is. , Watershed, The dividing line between one drainage basin and another, Waterfall, River landform created by erosion, where water drops steeply as it flows over cliff like feature. , Weathering, The chemical alteration and physical breakdown of rock in situ.

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