| dc.description.abstract | An investigation was carried out to assess the suitability of surface water for
irrigation purposes. For this reason 44 surface water samples were collected from
each union of Dinajpur Sadar Upazila, Dinajpur. Analysis were done including
pH, EC, TDS (total dissolved solids), cations (Ca2+, Mg2+, Na+
, K+
, Cu2+, Mn2+
and Fe3+) and anions (HCO3
-
, SO4
2-, PO4
3- and Cl-
). Several computed variables
such as SAR (sodium adsorption ratio), SSP (soluble sodium percentage),
hardness (HT), permeability index (PI) and Kelly’s ratio were used to evaluate the
suitability of surface water for irrigation purposes. Almost all the water samples
were within the recommended pH value for irrigation and had a great impact on
irrigation. No sample was excellent, 14 samples were good and 30 samples were
permissible for irrigation purposes with respect to electrical conductivity (EC).
For total dissolved solids (TDS) all samples were considered as fresh water for
irrigation. Based on SAR values, all samples were classed as excellent categories
for irrigation. On the basis of Ca, Mg, Na, K, Fe, Mn and Cu content the entire
water samples can safely be used for irrigation and would not affect the soils. In
the present study, no samples were considered hard while 25 samples were
moderately hard and 19 samples were soft for irrigation purposes. | en_US |
