The quality of Nile water in its main course and in the Rosetta (Rashid) and Damietta (Dimyat) branches showed a 16 percent improvement over the average during the excess discharge period (in October and November when excess water in Lake Nasr behind the Aswan High Dam is discharged into the river), according to a recent study by Egypt's Nile Research Institute (NRI) which is part the National Water Research Centre (NWRC).
