'The Characteristics and Formation of Meanders\r'

'Meanders are sinuous bends in a rivers middle and grimer courses. In low string up conditions, alternating pools and riffles are organize along the river bed. The river channel is deeper in pools so it has greater energy and more vitriolic power. Energy is lost as the river decreases all over a riffle because of friction. These cause the rivers flow to become uneven and maximum flow to be concentrated on unity view of the river, causing lateral wearing by on one side, creating an outer biconcave slang.Deposition takes place on the other side of the bend, creating a convex bank. The cross-section of a meander is asymmetrical. The outer bank forms a river cliff or a frank with a deep pool stringent to the bank, mainly because of the fast flow, hydraulic fulfill and abrasion. The home(a) bank is a thinly sloping deposit of sand and gravel, called a point bar. Meanders are maintained by a surface flow of body of water across to the concave outer bank with a balancing subsurface bring around flow back to the convex inner bank.This corkscrew-like movement of water is called helicoidal flow. In this way, wear away material from the outer bank is transported away and deposited on the inner bank. The combination of erosion and deposition exaggerates the bends until large meanders are formed. Sometimes, oxbow lakes are formed when the neck of the grummet of a meander is broken through, and the newborn cut eventually becomes the main channel, loss the formed channel sealed rack up by deposition.\r\n'