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Impact on Biological Properties of Fresh Water Bodies of Aila Affected South-west Region of Bangladesh

Tanushree Chattapadhyay
Environmental Science Discipline, School of Life Science, Khulna University Khulna-9208, Bangladesh

D.D. Chatterjee
Agriculture Officer, World Vision, Bangladesh

Abdullah Harun Chowdhury
Environmental Science Discipline, School of Life Science, Khulna University Khulna-9208, Bangladesh

Abstract/ Executive Summary:

The devastating cyclone Aila that hit the south-western coast of Bangladesh on 25 May, all the fresh water bodies of Koyra upazila sadar of southwest region are flooded by tidal surges of rivers channels with sea water intrusion and thus contaminated by all kinds of solid waste and debris as well as salt water inundation. Having no alternative fresh water sources except rain water, forcing this people to use this dirty and polluted water for using their household and other domestic purposes. To find out the necessary present major Biological parameter phytoplankton have been analyzed and compared this analyzed result with surface water quality standard suggested by Bangladesh authority for evaluating the water quality of fresh water ponds of Koyra upazila sadar and to take appropriate initiatives like some management approaches for the betterment of this existing water bodies. The phytoplanktonic abundance of the study area on an average is 82652units/l. The study is catheterized by Cyanophyceae, Chlorophyceae, Bacillariophyceae, Phaeophyceae, Euglenophyceae and Rhodophyceae. From this study the Phytoplankton abundance has found medium to high. But excessive load of some parameters due to addition of domestic waste, agricultural runoff and sea water intrusion by the cyclone Aila, natural quality of water have changed in this study area that caused abnormal phytoplankton growth and algal bloom in some study ponds because of Oscillatoria sp. which is the main sign of Eutrophication.

Keywords: Cyclone Aila, Phytoplankton, Water quality, Khulna

Location: Aila, the south-western coast, Bangladesh

Start Date: 00-12-2009

End Date: 00-12-2009

Program Area: Animal Health and Management

Commodity: Plankton

Objectives:

1. The present investigation was undertaken to find out the present Phytoplanktonic condition of the fresh water bodies.

Methodology:

The study was conducted in the south-western coastal belt of Koyra upazila of Khulna district in Bangladesh at December 2009. Among the 14 upazila of Khulna, Koyra is the southern coastal upazila and it is rapidly facing different natural calamities. As a source of fresh water five ponds were randomly selected in the Koyra upazilla sadar which were Kapotaksha Degree College’s pond, Sorkari Pond, Chairman’s Pond Lavlur’s pond and Upazila office's pond. Surface water samples were collected according to the standard sampling techniques. Samples were collected randomly which sampling from a finite population refers to that method of sample selection which gives each possible sample combination an equal probability of being picked up and each item in the entire population to have an equal chance of being included in the sample. The quality assessment of water samples was made through the estimation of planktonic species by volumetrically where assess the planktonic abundance. To conduct this study the samples were taken from different locations of the study area.

Source of Information: BANGLADESH RESEARCH PUBLICATIONS JOURNAL; ISSN: 1998-2003, Volume: 9, Issue: 3, Page: 200-207, January - February, 2014

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The most of people of Koyra upazilla sadar had depended on fresh water ponds as their source of domestic, bathing, washing, cooking, household and sometimes drinking purposes because no other alternative fresh water sources were found except rain water. But due to devastating cyclone Aila and its induced tidal surges, these fresh water sources are flooded and thus contaminated by all kinds of solid waste and debris as well as salt water inundation by the sea water through the rivers channels.Having no alternative fresh water sources except rain water, forcing people to use these dirty and polluted water sources for using their household and other domestic purposes. So by using these dirty and polluted water sources thousands of people is becoming sick. In this study Biological analyzed to take appropriate initiatives. All the measured Phytoplankton abundance has found medium to high. But excessive load of some parameters due to addition of domestic waste, agricultural runoff and sea water intrusion by the cyclone Aila, natural quality of water have changed in this study area that caused abnormal phytoplankton growth and algal bloom in some study ponds because of Oscillatoria sp. that is the main sign of Eutrophication.

Knowledge Management: Journal