THE IMPORTANCE OF RIVERS

THE IMPORTANCE OF RIVERS

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FORMATION OF MEANDER

AS WATER MOVES DOWNSTREAM AND AROUND A BEND, IT MOVES IN A SPIRAL FASHION.

IT MOVES TOWARDS THE OUTER BANK OF THE CURVES AT A GREAT VELOCITY, ERODING THE BANK.

MUCH OF THE ERODED MATERIALS IS THEN CARRIED TOWARDS THE OPPOSITE BANK AND IS DEPOSITED THERE.

DEPOSITION TAKES PLACE  BECAUSE OF THE FRICTION BETWEEN WATER AND THE RIVER BANKS AND BED IS GREAT, REDUCING THE VELOCITY.

THE WATER THEN MOVES DOWNSTREAM TOWARDS THE NEXT BANK IN A SPIRAL MANNER AND THE PROCESS IS REPEATED.

OVER TIME AT THE OUTER BANK, A RIVER CLIFF IS FORMED AND THE BANK BECOMES CONCAVE IN STEEP SLOPE SHAPE.

AT THE OPPOSITE BANK, A GENTLE SLIP OFF SLOPE IS FORMED AND AT THE BANK BECOME CONVEX.

THIS CONVEX AND CONCAVES IN A MEANDER GIVES THE CHANNEL AN ASYMMETRICAL SHAPE.

THE MEANDER