the causes and impacts of water pollution of buriganga river
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The Causes and Impacts of Water Pollution of Buriganga River
Presented by:Md Moudud Hasan
&Farida Yasmin Ruma
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Contents• Introduction• Water Quality of Buriganga River• Causes of Pollution• Impacts of Pollution• Recommendations• Conclusion
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Introduction
• The Buriganga river is the main river flowing through Dhaka, the capital of Bangladesh.
• Most of the industries and factories of Dhaka are situated on the banks of the Buriganga.
• The urban sewage of the Dhaka city is thrown in the Buriganga river.
• The average flow of the river - 140 m3/s in dry season (November to May) and 700 m3/s in wet season (June to October).
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Introduction
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Is Buriganga River Polluted?
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One of the most polluted river in the world
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Water Quality of Buriganga River
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Parameters Bangladesh Standard for
Fisheries (EQS,1997)
Investigated Water Quality (average value)
Wet season Dry season
pH 6.5-8.5 6.6 7.5DO (mg/I) 4.0-6.0 4.9 3.7BOD (mg/I) (-) or below 2 26.4 33.4TDS (mg/l) 500 238 579EC (µs/cm) 800-1000 1685 2250Temperature (°C) 25 27.04 18.2Transparency (cm) 40 24.6 22.8COD (mg/l) 4 188.60 265.33
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Causes of pollution • Discharge of industrial effluent• 249 industries along the banks of the river.• no waste water treatment plants of their own. • >60,000 m3/day of toxic waste
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Causes of pollution • Discharge of tanneries • 200 leather tanneries in the Hazaribagh area of Dhaka.• The tanneries discharge untreated liquid toxic waste @22,
000 m3/day
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Causes of pollution • Disposal of solid & domestic waste• Dhaka WASA’s only one sewage treatment plant with a
capacity of 0.12 Mm3/day (10 % of the total disposal of sewage).
• about 900 m3/day untreated domestic and human waste are discharged into the Buriganga-Turag system.
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Causes of pollution • Sedimentation at the upstream• because of the sedimentation on the
upstream, the flow of Buriganga-Turag system gets cut off, especially during the dry season
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Causes of pollution • Population explosion• Dhaka's 15 million people live in just 325 km2.
(> Belgium 11.2 million)
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Impacts of pollution • It is difficult to survive for aquatic life
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Impacts of pollution • Pressure on urban water source
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Impacts of pollution • Excessive health hazards
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Impacts of pollution • Navigation problem
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Recommendations
• Public awareness is the very important gears for pollution control.
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Recommendations
• Moving tannery from Hazaribagh• The plots at Savar’s Leather Industrial City allotted to tannery
units.
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Recommendations
• Set up new waste water treatment plants.
• Government should force all the industries to installed and use ETPs (Effluent Treatment Plant).
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Conclusion • River water quality was poorer in winter season than rainy
season.
• The physiochemical properties such as Temperature, pH and TDS were within the safe limit throughout the year.
• Dissolved Oxygen concentration in winter (January) very low due to various microbial activities--- an unfavorable environment for aquatic lives.
• Buriganga River water quality is not acceptable fromaquatic ecosystem perspectives for the parameters suchas BOD5, COD and EC during both dry and wet seasons.
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References 1. Chakraborty, C., M. M. Huq, S. Ahmed, T. Tabassum, and M. R. Miah. 2013. “Analysis of
the Causes and Impacts of Water Pollution of Buriganga River: A Critical Study.” Int J Eng Res Technol 2: 245.
2. “Dhaka.” 2016. Wikipedia, the Free Encyclopedia. https://en.wikipedia.org/w/index.php?title=Dhaka&oldid=720578573.
3. Rahman, Md Ashiqur, and D. A. Bakri. 2010. “A Study on Selected Water Quality Parameters along the River Buriganga, Bangladesh.” Iranica Journal of Energy & Environment 1 (2): 81–92.
4. Saifullah, A. S. M., M. H. Kabir, A. Khatun, S. Roy, and M. S. Sheikh. 2013. “Investigation of Some Water Quality Parameters of the Buriganga River.” Journal of Environmental Science and Natural Resources 5 (2): 47–52.
5. Uddin, Md Galal, Md Moniruzzaman, Muhammad Al-Amin Hoque, Md Abu Hasan, and Mala Khan. 2016. “Seasonal Variation of Physicochemical Properties of Water in the Buriganga River, Bangladesh.” World Applied Sciences Journal 34 (1): 24–34.
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THANK YOU FOR YOUR ATTENTION
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