ASSESSMENT OF SEASONAL (WET AND DRY SEASON) IMPACT OF IRRIGATION WATER QUALITY INDICES IN SOME SELECTED LOCAL GOVERNMENT AREAS OF KEBBI STATE, NIGERIA

This study aimed to assess the variation of salinity indices between wet and dry season of
some selected local government areas of Kebbi State, Nigeria namely Augie, Bunza, Birnin
Kebbi and Yauri in which irrigation water were sampled from the main sources of irrigation
water areas like borehole water, stream water and mix of borehole and stream water. The
result were analyzed appropriately by using laboratories materials, salinity indices; TDS,
SAR, EC, NO3
-, Cl
-, Mg
2+
, Na
+
, Ca
2+
were analyzed, Electrical Conductivity was determined
by conductivity meter electrode, pH by the glass electrode method, Ca
2+
and Mg
2+
was
estimated by EDTA titration method, while K
+
and Na
2+
were determine by flame
photometer. It was observed that the concentrations of some salinity indices in the study areas
showed that in both two season are likely to be the same, the mean value of Calcium in Yauri
area (1.56), Magnesium (1.53) , Sodium (0.75) , Potassium (0.75), NO3 (5.87), SAR (0.78)
, Cl (0.85) and SO4 (0.94) of both three samples collected during dry and wet season in Yauri
and Augie are the same at all the two seasons, the mean value of Electrical Conductivity
(23.76 ) of borehole obtained during dry season is very higher while its least in stream water
(3.03) at wet season in Yauri, in some cases electrical conductivity (EC) value of wet season
are lower than the dry season ranges from slightly moderate and tilting towards severity
across all the 3 sources irrespective of the location sampled.