| dc.description | Water is the most vital element among the natural resources, and is crucial for the
survival of all living organisms including human, food production, and economic
development. Today, nearly 40 percent of the world’s food supply is grown under
irrigation, and a wide variety of industrial processes depends on water. The water
resources, about 97.2% are saline water mainly in oceans and only 2.8% is
available as freshwater. Out of 2.8%, about 2.2% is available as surface water and
0.6% as groundwater (Raghunath, 1987). At present one fifth of all the water used
in the world is obtained from groundwater sources. Agriculture is the greatest user
of water accounting for 80% of all consumption. Barring deep groundwater, it .
ceaselessly cycled by nature through siinosslieres terrasphere and biosphere. Water
resources are harnessed for various purposes for the benefit of mankind like;
drinking, irrigation, municipal and industrial uses hydropower generation, flood
management, fish farming, navigation, ecological needs, recreation, et | en_US |
| dc.description.abstract | An experiment was performed to determine the quality of groundwater for crop production
in four Upazilla of Nilphamari district in Bangladesh. One hundred water samples of
groundwater and surface water sources were collected from different locations for the
determination of chemical quality. The research work was accomplished to assess the extent
of water quality and to predict the suitability and acceptability for irrigation, drinking and
domestic usage. Surface and groundwater samples collected from selected areas were
classified by analyzing chemical constituents present therein. Several parameters like pH, EC,
TDS, SAR, SSP, RSC, H, B, Fe, Mn etc were considered for the classification.
The pH value of all the water samples fluctuated 6.81 to 7.81 and we found ‘suitable’ for
irrigation, drinking and domestic usage. The EC and TDS volume of water samples were
found in the range of 284 to 745 uS cm” and 104.5 to 458 mg L"respectively. On the basis of
EC and SAR, all the waters were found low salinity and low to medium alkali hazard. Out of
the 100 samples, 10 samples were classified as C2S4 and 90 samples were in C3S4 categories.
SSP values of 45 samples were rated as excellent, 25 samples were good, 20 samples were
permissible and 10 samples were doubtful classes were suitable for crop prediction. Out of
100 samples all samples were suitable for crop production on the basis of RSC values. On the
basis of H;, 25 samples were moderately hard, 20 samples were hard and rest samples
were very hard categories.
TDS values of 10 samples were brackish water and the rest 90 samples were fresh
water. The water should not be problematic for irrigation used and also can be safely
used for domestic consumption. In the study areas, the water contained an
appreciable amount of Ca Mg Na and K in the range of 0.10 to 8.82, 0.71 to 11.64,
1.65 to 7.8 and 0.000769 to 0.03 meq L", respectively. Fe, Mn, Zn, Cu, B, SO, and
NO, concentrations were found within safe limit for irrigating crops. Finally the
water samples were suitable for crop production.
The relationship of water quality factors in computed regression line recorded
among the pH-EC, pH-SAR, pH-SSP, and pH-RSP, EC-SAR, EC-SSP, EC-RSC,
SAR-SSP, SAR-RSC and SSP-RSC where synergistic; relationship was found. In
contrary, pH -EC, pH - SAR, pH - SSP, EC - SAR, EC - SSP and EC- RSC were
found an antagonistic behavior.
All the waters under test may be recommended for irrigating all types of agricultural crop
in the study area. The present investigation indicated that the analysis of groundwater is
important for proper understanding of the irrigation and drinking water quality and its
impact on crop production and human health. It is suggested that irrigation water should
be analyzed systematically for understanding the impact of irrigation water towards the
healthy crops in the entire irrigated area through out the country. Some base loving crops
can be grown successfully in the area. | en_US |
