1. NBI (2016) Nile Basin water resources atlas, Nile Basin Initiative (NBI). New Vision Printing and Publishing Company Ltd., Kampala, Uganda, p 201
2. PRB (2016) 2016 World Population Data Sheet. Population Reference Bureau: www.prb.org . Accessed in Nov 2016
3. Mckee JE, Wolf HW (1971) Water quality criteria, 2nd edn. State Water Resources Control Board Publication, No. 34, California, pp. 23–25
4. Fishbein L (1974) Water pollution by pesticides. J Fish Biol 56:269–279
5. Gibbs J (1972) Water chemistry of the Amazon River. Geochim Cosmochim Acta 36:1061–1066