(b) Contributions of rivers to development.
(i) Navigation purposes.
(ii) Source of fishes used for food and trade.
(iii) Used for industrial purpose.
(iv) Used for domestic purposes.
(v) Useful for irrigation in dry areas.
(vi) Used for recreation and tourism.
(vii) Hydro electric power production.
(viii) Nuclei for development of river basin authorities.
(c) Problems encountered in the use of rivers;
(i) River pollution
(ii) Narrow channel
(iii) Shallowness
(iv) Shortness of rivers
(v) Rapids and waterfalls.
(vi) Silting at river mouths
(vii) Growth of water weeds