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This means that the river, with channel sediment build-up, now flows at a higher level than the floodplain. A high hydraulic radius means that the river is efficient – this is because moving water loses proportionately less energy in overcoming friction than when the ratio between the cross-sectional area and the wetted perimeter is low. Attrition – the reduction in the size of fragments and particles within a river due to the processes described above. This is particularly noticeable on a meander bend, where suspended load carried by the river erodes the outside edge of the bend by abrasion and load in deposited on the inside of the bend to form a point bar.
Whether you have minutes or hours to study, you can choose from many topics, ensuring that you are focusing on the topics that you are struggling to fully understand, or that you need a bit more reinforcement with. M Davies, who argued that irregularities in the long profile which would reflect changes in underlying geology are eventually worn away by river erosion to give a smooth graded profile. Plate boundaries, known as divergent, convergent, and transform, work differently yet have a unified impact on the movement and structure of the land. In this situation the gradient at each point along the river is sufficient to discharge the water and load but there is little excess energy available for further erosion. Etsy’s 100% renewable electricity commitment includes the electricity used by the data centres that host Etsy.This may also be referred to as the profile of dynamic equilibrium, where a balance has been achieved between the processes of erosion and deposition. This is mainly caused by increased soil erosion, which occurs because the vegetation that protected the soil from the actions of moving water on its surface has been removed. The content covered in these flashcards only highlights the five main themes in geography and does not provide extensive details. Trees intercept water and take it up through there roots, so in deforested areas more water reaches the channel as runoff.
Size of the drainage basin – large drainage basins with many tributaries have a greater potential for transporting sediment, particularly in their lower courses, than do small drainage basins. A river deposits when there is a decrease in its level of energy, it is no longer competent to transport its load. In this flashcard set, you will discover the Hispanic nations that use Spanish as their formal language. Brainscape’s GCSE Geography flashcards cover the mountain of content you need to know to take on Papers 1 and 2 of the AQA GCSE Geography exam, and the fieldwork section on Paper 3. Although the culvert remained to take some water underground during flood conditions, a new lake was created to take over.Brainscape’s collection of AQA GCSE Geography flashcards have distilled the entire curriculum down into over 900 question-and-answer flashcards, which you can study anywhere, anytime on the web and via the mobile app for iOS or Android. Rejuvenation occurs either when the sea level falls or when the land surface rises – either situation allows the river to revive its erosion activity in a vertical direction. Rainfall totals for May to July 2007 were the highest on record for England and Wales since 1766, with many areas registering more than twice the long-term average. They supplied critical emergency supplies and conducted a ‘damage and needs assessment’ in the affected areas. The melting of snow, particularly when the subsoil is still frozen, so the infiltration capacity is reduced.
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