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National Hydrology committee of Afghanistan (NHCA ...

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Sediment is fragmental material,<br />

primarily formed by the physical<br />

and chemical disintegration <strong>of</strong><br />

rocks from the earth crust.<br />

The process <strong>of</strong> moving and<br />

removing from their original<br />

source or resting place is called<br />

erosion

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