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Quality Assessment of Groundwater and Surface Water for Domestic and Irrigation Uses in Comilla District of Bangladesh

P. K. Roy
Department of Agricultural Chemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh

S. R. Roy
Department of Agricultural Chemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh

B. Roy
Department of Agricultural Chemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh

M. Sarkar
Department of Agricultural Chemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh

B. C. Sarker*
Department of Agricultural Chemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh

Abstract/ Executive Summary:

Twenty seven Water quality assessment for drinking and irrigation groundwater and three surface water samples were collected from Homna Upazila of Comilla District, Bangladesh. The chemical properties of these samples were analyzed to assess the suitability for domestic and irrigation purposes. Most of the samples were alkaline in nature ranging pH from 6.81 to 7.8. The dominant ions were Na, Cl, Ca, Mg and HCO3 with the average values of 4.70, 6.35, 3.18, 5.11 and 4.60 meq L-1 , respectively. The other ions like K, Fe, Mn, Zn, Cu, B, SO4 and NO3 were within acceptable limit for irrigation and drinking purposes. Arsenic (As) contamination was found in 46.66% water samples. Electrical conductivity (EC), pH, total dissolved solid (TDS), sodium adsorption ratio (SAR), and soluble sodium percentage (SSP) of the waters were used to classify determining their suitability. Some waters might be used for domestic and drinking as well as irrigation purposes. Water contaminated with As should be purified before human consumption to save public health.

Keywords: Domestic uses, Irrigation uses, Water quality

Location: Homna Upazila of Comilla District, Bangladesh

Start Date: 00-04-2007

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Groundwater, Water quality, Surface water

Objectives:

Water quality assessment is necessary prior to its safe use for domestic and irrigation purposes. The present study was designed to investigate the chemical properties of groundwater and surface water for assessing their suitability for domestic and irrigation purposes.

Methodology:

Thirty water samples were collected from different locations at Homna thana of Comilla district in April, 2007. Samples were collected from two different sources: hand tube well and river. After collection, the samples were immediately brought to the laboratory of Agricultural Chemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur; for chemical analysis. The pH and EC of sampled waters were determined by using pH meter (Hanna instrument-211) and EC meter (Hanna instrument-H18033). The values of TDS of waters were estimated by evaporating a measured aliquot of filtered samples. The Na and K ions were estimated by flame photometer, and Ca and Mg ions were determined by the complexometric titration method. The other cations like Fe, Mn, Cu, Zn, B, and anions like Cl, NO3-N, SO4-S, HCO3, and CO3 were determined as per standard procedure. The toxic element, As was detected qualitatively. Irrigation water quality parameters viz. SAR, SSP, and HT were used to classify the suitability of waters, along with pH, EC, and TDS. The values of SAR, SSP and HT were calculated from the analyzed data.

Source of Information: Journal of Science and Technology 11(June 2013): 25-31

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Chemical analysis of different water samples show good for domestic and irrigation purposes. Some water samples contained an undesirable level of EC, TDS, and SSP but the SAR and B contents were within the safety limits. Undesirable level exerted a significant impact on crop production and soil properties. In the study area, the suitable and moderately suitable waters could be used for domestic and irrigation purposes without any detrimental effects. Higher EC value helps to the development of soil salinity that has a deleterious effect on soil properties if uses for prolonged periods. In this study, 53% water samples were As free and can be used safely; but 47% contained As in different levels which have harmful effects on domestic and irrigation uses.

Knowledge Management: Journal