The Causes and Impacts of Water Pollution of Buriganga River

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INTERUNIVERSITY PROGRAMME INWATER RESOURCES ENGINEERING

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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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https://en.wikipedia.org/w/index.php?title=Dhaka&oldid=720578573

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THANK YOU FOR YOUR ATTENTION


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The Causes and Impacts of Water Pollution of Buriganga River

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