Water Pollution In Bangladesh

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EIA in Bangladesh Groundwater
Water is a vital service in nature and can be a regulating resource to man and other breathing beings. Water superiority is influenced by both natural and anthropogenic involvement where the former contains local climate, geology etc., and the latter covers the erection of dams and ridges, irrigation practices, uncritical dumping of industrial wastes etc. Seawater interruption or invasion is a special case of water pollution and is detected in many seaside regions of the world. Under natural circumstances, freshwater run towards the sea restrictions the landward encroachment of seawater. On the other hand, erection of bores for groundwater supplies and subsequent lowering of the water table or piezometric surface …show more content…

soil, surface water and groundwater, this is of great worry to all societies and this is why it is very significant to assess and monitor water superiority at regular intervals. Bangladesh is mostly reliant on groundwater for drinking and irrigation practices, and 90% of consumption water is abstracted from aquifers. Therefore, any pollution (natural or artificial) to this natural resource will convey about a severe disaster to the whole socioeconomic environment of Bangladesh. The salinity problem in southwest Bangladesh and the recently recognized arsenic problem in groundwater almost over all of Bangladesh has been a matter of worry to the country. The study region, situated in south-western Bangladesh and downstream of the familiar Ganges delta region, is on the Bhairab-Rupsa-Pasur River complex, about 100 km north of the seashore of the Bay of Bengal. The latitude of the region is 22714b28n to 22739b19n north and longitudinally it expanses from 89724b32n to 89741n …show more content…

The average lowest discharge (March–April) in the Ganges between the years 1988 and 1995 was F593 m3/s, which is about 73% less than that before the Ganges water diversion, i.e. before 1975. Hossain (1987) studied the maximum and minimum discharge of the Ganges at Hardinge bridge point, before and after the commissioning of the Farakka barrage (from 1956 to 1986). That study revealed that the average highest discharge (August–September) before and after 1975 were 46998 and 55570 m3/s respectively. On the other hand, the mean lowest discharges (March–April) during pre- and post-Farakka period were found to be 2006 and 809 m3/s respectively. The study also concluded that average peak discharge was increased by F12% compared with average peak flow before 1975. On the same basis, the average lowest discharge was decreased by 60% (Hossain 1987). This large-scale reduction or withdrawal of the Ganges outflow greatly influences the Bhairab-Rupsa-Pasur River complex of the study area as it is fed by the mighty Ganges. This reduction causes a drop in hydraulic head of the Ganges and its tributaries, which ultimately accelerates the saline front movement or saline water intrusion towards the inland freshwater

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