The Afon Glaslyn, SnowdoniaCase Study of fluvial landforms and processes
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Have a little read: ... The Afon Glaslyn, Snowdonia Case Study of fluvial landforms and processes All rivers aim to reach equilibrium so they are balanced and when they are in equilibrium from source to mouth a smooth curve is created called the graded long profile. However, as you can see from the diagram many rivers such as The Afon Glaslyn, do not acheive equilibrium and reach their graded long profile: Long Profile of Afon Glaslyn River with graded long profile Rivers become out of equilibrium when there is a change in base (sea) level. There can either be a positive change (rise) in the sea level or a negative change (fall) in sea level, resulting to a change in base level and a new graded long profile. Sea level changes happen because the Earth is in or out of glacial periods. Therefore sea level is changed either eustatically- a change in sea level due to a change in
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