DELTA

DELTA IS A FLAT PIECE OF LAND THAT IS MADE UP OF LAYERS OF SEDIMENTS DEPOSITED AT THE RIVER MOUTH OVERTIME.

THERE ARE TWO TYPES OF DELTA

1.FAN OR TRIANGLE SHAPED– WHEN THE RIVER DEPOSITS ITS LOAD UNIFORMLY OVER THE WHOLE YEAR.

2.BIRD’S FOOT– WHEN THE RIVER DEPOSITS ITS LOAD RAPIDLY AT THE RIVER MOUTH AND EXTEND OUTWARDS INTO THE SEA LIKE A CLAWS OF BIRDS.

AS THE RIVER APPROACHES TO THE CALMER SEA WATER, ITS VELOCITY DECREASES. IT STARTS TO DEPOSIT ITS LOAD AT THE MOUTH.

AS THE SEDIMENTS CONTINUE TO ACCUMULATE, THEY OBSTRUCT THE PATH OF THE RIVER WHICH THEN BRANCHES INTO SMALLER RIVERS (DISTRIBUTARIES) TO FIND A WAY AROUND THE OBSTRUCTION.

THE SEDIMENTS ARE CARRY WATER AWAY FROM THE MAIN RIVER IN SEVERAL DIRECTIONS BEFORE FINALLY REACHING THE SEA

OVER TIME LAYERS OF DIFFERENT MATERIALS SUCH AS SAND, SILT AND CLAY ARE BUILT UP ON THE SEA FLOOR AND A DELTA FORMED

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