Preliminary assessment and spatial distribution of selected water quality parameters at Kalmadu tank in Vavuniya District of Sri Lanka
This research on Kalmadu tank aims to analyze the horizontal and vertical profiles of selected water quality parameters. Twenty randomly selected sampling points on surface and corresponding vertical depths of 30 cm and 60 cm were measured for temperature, pH, TDS, EC and ORP using intended electronic probes. The measured values were statistically analyzed with t-test, paired t-test and Pearson correlation. Kriging interpolation technique was used to visualize the spatial distribution. Results revealed non-compliance of TDS and EC with existing permissible limits for irrigable water.