Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2008.982.988K. AdeyemoOlanike O. BabalobiOlutayo 72008117More accurate spatio-temporal predictions of urban environment are
needed as a basis for assessing exposures as a part of environmental studies
and to inform urban protection policy and management. In this study, an
information system was developed to manage the physico-chemical pollution
information of Ibadan river system, Oyo State, Southwest Nigeria. The
study took into account the seasonal influences of point and non-point
discharges on the levels of physico-chemical parameters. The overall sensitivity
of the watershed to physicochemical environmental pollution revealed that
during dry season, of the 22 (100%) sample points, only 3 (13.6%) were
unpolluted; 6 (27.3%) were slightly polluted; 10 (45.4%) were moderately
polluted; 2 (9.1%) were seriously polluted and 1 (4.5%) was exceptionally
polluted. During rainy season, 3 (13.6%) were unpolluted; 7 (31.8%) were
slightly polluted; 9 (40.9%) were moderately polluted; 2 (9.1%) were seriously
polluted and 1 (4.5%) was exceptionally polluted. There is a considerable
environmental risk associated with the present level of pollution of the
Ibadan river water body on fish health and biodiversity. This research
provides a basis for aquatic management and assist in policy making at
national and international levels. Appropriate strategies for the control
of point and non-point pollution sources, amendments and enforcement of
legislation should be developed.]]>Adeyemo, O.K.,200323297306Adeyemo, O.K.,20052005Aggarwal, T.R., K.N. Singh and A.K.Gupta,200019491494Ajibade, L.T.,2004241118Burrough, P.A.,1986Dunnette, D.A.,1979515361Farabi, H.,20052005pp: 18Filani, M.O.,1994Kleinschmidt, I., M. Bagayoko, G.P.Y. Clarke, M. Craig and D. Le Sueur,200029355361Liu, S., P. Tucker, M. Mansell and A. Hursthouse,2003255762Noreña-Barroso, E., G. Gold-Bouchot and V. Ceja-Moreno,200779141146Soto-Jiménez, M.F., F. Páez-Osuna and A.C. Ruiz-Fernández,200343913921Takken, I., J. Croke, S. Mockler, P. Hairsine and P. Lane,20052005pp: 580587