Abstract:
This study was aimed to assess the quality of groundwater from the springs of Deumai
khola watershed, Ilam, Nepal, for the suitability in irrigation purposes. A total of 11
samples were gathered and examined during the PRM season. These samples were
obtained from various springs. The investigation focused on determining the
physicochemical characteristics, including EC, TDS, pH level, %Na, temperature,
SAR, total hardness, alkalinity, total iron content, and the concentration of major ions
such as Na+
, K
+
, Ca2+
, Mg2+
, NO3
-
, SO4
2-
and Cl-
. The ground water of the research area
was somewhat alkaline to marginally acidic with average pH of 7.47. The average value
of EC and TDS was observed 110.82 µS/cm and 53.73 mg/L respectively. The
determination of concentration of chemical parameters was performed by using
spectrophotometric method, flame photometric method and titration method. The
average value of %Na and SAR was found to be 29.44 and 0.56 respectively. Also, the
abundance order of major cations was; Ca2+ > Na+ > Mg2+ > K+
and that for anions was;
Cl- > NO3
- > SO4
2-
. All of the parameters met the requirements set forth by the FAO for
irrigation water.
