Impact of Human Activities on the Physiochemical Quality of Streams Around Ijeun- Titun and Kuto Community in Abeokuta, Ogun State, Nigeria

Abstract

The study aimed to determine the impact of human activities on the physicochemical quality
of the streams in the Ijeun- Titun and Kuto communities in Abeokuta, Ogun State, Nigeria.
Ten (10) composite water samples were collected from upstream and downstream of five (5)
streams (Lafaru, Ijeun- Titun, Isale - Oja, Isabo, and Stadium). Temperature and pH were
tested in situ, then samples were transported to the chemistry laboratory of Pure Science
Institute for further analysis. The analyzed physicochemical parameters were carried out
using standard methods. Results showed that pH (6.70-7.42), temperature (except the upstream of stream D (36.3 0C), electrical conductivity (EC) (265 - 547 μS/cm), total dissolved solid (TDS) (132 - 458 mg/L) and total alkalinity (85.5 - 134 mg/L) across the streams were within the WHO standards (6.5 - 8.5, 25 - 9.0oC, 1000 μS/cm, <600 and 200 mg/L). Total acidity ranged from 11.0-28.0 mg/L across the streams. Salinity (135 - 276 mg/L) across the streams was higher than the WHO standard (100 mg/L), chloride ion (Cl-) was higher at the upstream and downstream of stream B (284 and 266 mg/L) and C (1232 and 308.85 mg/L) respectively than the WHO standard (250 mg/L) while dissolved oxygen (DO) was low in the upstream and downstream of the streams compared to the WHO standard (13.0 - 14.0 mg/L). The study revealed an unacceptable concentration of salinity and DO across the streams, chloride ions in stream B (Ijeun –Titun) and C (Isale- Oja) and temperature upstream of stream D (Isabo) in the community.