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18 Cards in this Set
- Front
- Back
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Abrasion
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The wearing away of the shoreline by sediment carried by waves.
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Attrition
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The reduction and rounding of particles of sediment carried in water by repeated collision with each other and the shore.
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Baseflow
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Water that reaches the channel largely through slow throughflow and from permeable rock below the water table.
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Bank Full
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The state of flow of a river when it completely fills its channel.
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Bedload
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Larger material, cobbles, pebbles and sand transported by saltation.
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Braided Stream
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Made up of many interconnected channels separated by small islands of deposited materials.
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Capacity
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The total volume of sediment a river can carry.
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Calibre
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The measurement of the long axis of sediment in a river.
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Competence
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The maximum size (calibre) of load a river is capable of transporting.
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Corrasion
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Erosion by friction of load in contact with banks and bed.
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Corrosion
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Includes the dissolving of carbonate rocks (e.g. limestone) in seawater and the evaporation of salt crystals which expand on formation and help the rock to disintegrate.
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Dams
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Barriers engineered to hold back water, may be multipurpose; storage, flood management, recreation.
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Deltas
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Form when the amount of sediment delivered at the mouth of a river exceeds the amount removed by waves and tidal currents.
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Discharge
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The volume of water flowing in a river per second measured in cumecs (cubic metres per second)
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Do minimum
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Maintain existing flood measure but no more (management strategy)
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Dredging
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To remove sediment from the river bed to increase the depth of the channel
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Eustatic
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Changes in sea level caused by variations in the amount of water in the oceans.
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Evapotranspiration
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The loss of water from a drainage basin into the atmosphere from the leaves the plants.
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