Antecedent rainfall - the amount of moisture already in the ground before a rainstorm, Abrasion - pebbles are dragged along the river bed or bump into the channel wearing it away, Attrition - where rocks and stones wear each other away as they knock together becoming rounder and smoother, Channel - the bed and banks of a river, Discharge - the volume of water flowing in a river, measured in cubic metres per second, Erosion - wearing away of the landscape , Flood plain - flat land around a river that gets flooded when the river overflows, Gorge - a steep valley, Gradient - slope, Groundwater flow - horizontal movement of water through rocks in the ground, Helicoidal flow - a continuous corkscrew motion of water as it flows along a river channel, Hydraulic action - the force of water within a stream or river, Storm Hydrograph - a graph showing the river's response to a storm event, Infiltration - the soaking of rainwater into the ground, Interception - the storage of rainwater by leaves and branches., Interlocking spurs - hills that stick out on alternate sides of a V-shaped valley, like the teeth of a zip, Levées - naturally formed or artificially built embankments beside rivers, Load - material carried by a river such as boulders or stones, Long profile - shows how a river’s gradient changes as it flows from its source to its mouth, Mass movement - the movement of material downslope, such as rock falls, landslides or cliff collapse, Meander - a bend in a river, Ox-bow lake - a lake formed when a loop in a river is cut off by floods, Permeable - allowing liquids to pass through it, Plunge pool - a hollow at the foot of a waterfall, Point bar - a low, curved ridge of sand and gravel along the inner bank of a river which is formed by deposition, River cliff - the steep edge of a river formed when a river erodes and undercuts its outer bank, Saltation - the bouncing of material from and along a river bed or a land surface, Sediment - material such as sand or clay that is transported by rivers, Soil creep - the slow gradual movement downslope of soil, scree or glacier ice, Solution - chemicals dissolved in water, invisible to the eye, Surface run-off - rainwater that runs across the surface of the ground and drains into the river, Suspension - tiny particles of sediment floating in water, Thalweg - the line of the fastest flow along the course of a river, Throughflow - the flow of rainwater sideways through the soil, towards the river, Traction - force that rolls or drags large stones along a river bed,

River Key Words

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