Assessment of some Physico-chemical parameters of Tagwai Reservoir, Minna, Niger state, Nigeria

Abstract

This study on the assessment of physico-chemical parameters of Tagwai dam with aid of GIS, Minna, Niger state, Nigeria was carried out from February 2016 to July 2016; Five sampling stations were chosen, namely; Tasabo (station1), Maigan-ga (station2), Lokoto (station3), Dutsen-kura (station4), and the dam site named Gmukpa (station5). The Physico-chemical parameters were determined using standard methods, procedures, and instruments. The result revealed that; Watertemperature(26.36±0.70-32.40±4.17oC),pH(6.53±0.20-7.91±0.11), Transparency(99.60±2.70 -135.40±25.25), Conductivity(74.60±1.14µS/cm 91.60±1.67µS/cm), Total Dissolved Solids(0.09±0.03mg/L-0.26±0.38mg/L), Nitrate-nitrogen(0.16±0.03mg/L-0.43±0.17mg/L), Total hardness(31.46±1.64mg/LCaCO3-43.38±0.85mg/LCaCO3), Dissolved Oxygen(5.76±2.10mg/L-13.60±3.85mg/L),Phosphate-phosphorus(6.53±0.20mg/L-0.30±0.15mg/L), and Water depth(6.38±2.75m-11.18±4.80m) varied with months and seasons. Analysis of variance showed significant difference between seasons (P < 0.05). Water quality of the dam is influenced by anthropogenic activities such as runoffs of inorganic fertilizers and pesticides; dam water is suitable for irrigational and domestic purposes in terms of most of the Physico-chemical parameters analyzed. Hence, there is need for an effective anthropogenic inputs control programme in the dam.