How Contaminated is Groundwater? The continued abstraction of water from unconfined aquifer releases pentavatent arsenic and is transformed into trivatent arsenic on reduction to become soluble and Groundwater pollution in bangladesh in water. Statistically reliable estimates of the percentage of wells contaminated will be available when the survey results are released in late It is estimated that there are over 7, industries in Dhaka metropolis located mostly in three clusters -- Hazaribagh, Tejgaon and DND area.
Who will bear the carrying cost if they fail to evacuate the place after sending the pump? Improper application of pesticides and disposal of industrial waste are also adding to the pollution.
In 14 of these upazilas from the country's central and northern parts, water level goes over 11 metres down in dry season, says the quarterly monitoring report of Survey and Monitoring Project for Development of Minor Irrigation.
Solid Waste and Sewage Disposal. Irrigation Percolation of irrigation water into soils dissolves soil salts and transports them downward. Most of the sewage lines of Dhaka city have been blocked by indiscriminate dumping of polyethylene bags over the years.
The Chandnighat plant treating water from the Buriganga River has the capacity of supplying 3. The iron oxide medium eventually becomes saturated, and must be replaced. Mahmud Hossain, owner of a washing plant in Gazipur, said their industry generated cubic metres of waste water every day.
Agricultural Activities Agriculture is one of the most widespread human activities that affects the quality of groundwater.
But pollution in surface water in the district is alarming. Groundwater moves very slowly, and it may be years after remedial actions re taken before improvements in water quality are obsessed.
This year in the district for want of water as the ground water level has fallen and almost all the water bodies including rivers, canals and ponds dried up affecting irrigation seriously. Wholesale dumping of industrial waste, sewage and garbage left the river, touted the lifeline of the capital, in this sorry state.
History The first water supply system was introduced in Dhaka by the British in under the jurisdiction of the district civil surgeon at Chandighat. However, the groundwater of this city is facing some continuing problems over the last few decades.
Any sort of noise pollution seriously affects expecting mothers. If the present month passes without rainfall the drought like situation will persist in the district and may affect production of irri-boro crops this year. The health hazard due to this contamination has raised the serious concern for public health.
Arsenic Contamination of Ground Water. Land and Climate Bangladesh, most of which is at low elevations, is divided into five physical regions: It is a serious but neglected issue throughout Bangladesh. It is also observed that even if a person having no manifestations after consuming contaminated water the chance of having cancer cannot be ruled out.
It is manifested by deforestation, destruction of wetlands, soil erosion and natural calamities. At high stream stage during monsoon, there may be direct recharge into the upper aquifer if it is not saturated with rain-water. However, in an application to the executive engineer of MODS Zone-6, Dhaka Wasa, people from some mohallas of Madartek said after the recent flood each and every resident of the area has cleaned their underground reserve tanks as per the instruction of Wasa, but they still get contaminated water from the supply line.
The extensive river systems of Bangladesh are fundamental to the nation's economy and way of life. Treatment of surface water is relatively complicated and expensive. Who will bear the carrying cost if they fail to evacuate the place after sending the pump? This paper analyzes the different types of environmental pollution and associated health hazard in Bangladesh.Bangladesh is suffering from one of the world’s worst cases of groundwater contamination by dissolved arsenic.
Whilst about 35 million people of the country are drinking high arsenic groundwater, Dhaka, the capital of Bangladesh, is apparently free of arsenic contamination. Arsenic contamination of the groundwater in Bangladesh is a serious problem.
Prior to the s, Bangladesh had one of the highest infant mortality rates in the world. Ineffective water purification and sewage systems as well as periodic monsoons and flooding exacerbated these problems. Nine districts in West Bengal, India, and 42 districts in Bangladesh have arsenic levels in groundwater above the World Health Organization maximum permissible limit of 50 microg/L.
The area and population of the 42 districts in Bangladesh and the 9 districts in West Bengal are 92, km(2) and million and 38, km(2) and million, respectively. Bangladesh is suffering from one of the world’s worst cases of groundwater contamination by dissolved arsenic.
Whilst about 35 million people of the country are drinking high arsenic groundwater, Dhaka, the capital of Bangladesh, is apparently free of arsenic contamination.
Industries cause air and water pollution through smoke emission, inadequate solid waste management and dumping of untreated effluent to lakes, rivers and ground water. The arsenic pollution of groundwater has become a major disaster for Bangladesh. F. Islam, Assistant Bacteriologist (), Bangladesh.
Introduction. The contamination of groundwater by arsenic in Bangladesh is one of the largest poisoning of a population in the history. The scale of this environmental poisoning disaster is greater than any seen before.Download