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State the Organic Pollution Level in Rain Fed Ponds, Noakhali, Bangladesh

Najmus Sakib Khan
Department of Oceanography, Noakhali Science & Technology University, Noakhali-3814, Bangladesh

Saiful Islam
Department of Oceanography, Noakhali Science & Technology University, Noakhali-3814, Bangladesh

Abstract/ Executive Summary:

The present study has been conducted to assay the water quality of rain fed ponds by determining the organic pollution level according Palmer’s algal pollution index. A total three genera (Ankistrodesmus, Chlorella, Scenedesmus) of Chlorophyceae, four genera (Cyclostella, Navicula, Synedra, Melosira) of Bacillariophyceae, two genera (Euglena, Phacus) of Euglenophyceae and only one genera (Oscillatoria) of Cyanophyceae were identified for determination of Palmer’s algal pollution index. Chlorella and Euglena were most dominant phytoplankton in all observed rain fed ponds during sampling. Algal pollution index of pond A, B, C, D, E and F was 16, 23, 21, 13, 10 and 17 respectively. According to the index value pond A and F were found probable high organic pollution. On the other hand pond B and C were observed confirmed high organic pollution. More over pond D had moderate pollution and pond E was detected as lack of organic pollution. Some physico-chemical water quality parameters (water temperature, transparency, total suspended solids, P H, total alkalinity, free CO₂ and ammonia) were also estimates as a supporting water quality analysis during sampling periods.

Keywords: Organic pollution, Palmer’s algal pollution index, Rain fed pond, Water quality

Location: Sonapur, Noakhali district, Bangladesh

Start Date:

End Date:

Program Area: Risk Management in Agriculture

Non-commodity: Pollution

Objectives:

The present study is a preliminary step to evaluate the organic pollution level by using Palmer’s algal pollution index (1969) and some physico-chemical water quality parameters in rain fed ponds.

Methodology:

There are total six rain fed ponds were selected for phytoplankton sampling and water quality analysis in Sonapur, Noakhali district, Bangladesh. The present study conducted from 16 August 2019 to 7 September 2019 during monsoon. 2.2 Plankton collection and estimation Phytoplankton were collected through plankton net (mesh size: 25 µm) and preserved in 5% buffered formalin. Specific species of phytoplankton according to Palmer’s algal pollution index were identified by using a light binocular microscope (Labomed, model: CXL-181085030) at 16×10 and 16×40 magnification level. The phytoplankton genera were identified up to genus level. 2.3 Water quality analysis Some important physico-chemical water quality parameters as temperature, water transparency, pH, total suspended solids, total alkalinity, free Carbon-di oxide and ammonia were determined. Water temperature, pH and transparency were determined on spot by thermometer, pH meter (HANNA- HI98107) and secchi disc respectively. Total suspended solids, total alkalinity, free Carbon-di oxide and ammonia were measured by following guidelines of the American Public Health Association. 2.4 Statistical Analysis ANOVA (One-way analysis of variance) through Microsoft EXCEL were used for data analysis.

Source of Information: International Journal of Fisheries and Aquatic Studies 2019; 7(5): 438-441

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

This study provides preliminary statement of the organic pollution index values of rain fed ponds in Noakhali, Bangladesh during monsoon. Rain fed ponds play an important role in local economics by monsoonal fish trapping through native fish traps. The aquatic chemistry and algal composition ensures the availability and abundance of native fishes in rain fed ponds.

Knowledge Management: Journal