5. The average streamload (suspended and bed) of the Umgeni River, derived from surface runoff, scouring of banks and dr

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5 The Average Streamload Suspended And Bed Of The Umgeni River Derived From Surface Runoff Scouring Of Banks And Dr 1 (62.88 KiB) Viewed 30 times

5. The average streamload (suspended and bed) of the Umgeni River, derived from surface runoff, scouring of banks and dragging of material on the river bed, comprises fine sand (675 kg); medium sand (1250 kg); rough sand (3500 kg); silt (550 kg); clay (475 kg) and gravel (5250 kg). Calculate the following: 5.1. Total amount of colloids derived from the dragging of material on river bed ifbank scouring and surface runoff contribute 25% and 55%, respectively, to the total amount of colloids in the Umgeni River. (5 marks) 5.2. Total sand content in bedload of Umgeni River if 65% of fine sand and 25% of medium sand are in suspension. (4 marks)