Why Aswan high dam was constructed

i.    Control floods of the Nile.
ii.    To generate hydro electric power (H.E.P.) to run industries.
iii.    To preserve water for irrigation purposes in the lower Nile valley.
iv.    To check on the problems of silting along the Nile.
v.    To create a man made lake so as to improve on the inland water transport and act as a source of fish.