Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Investigation of Water Quality Parameters from Ramna, Crescent and Hatirjheel Lakes in Dhaka City

M. S. Islam
Department of Environmental Science and Resource Management, Mawlana Bhashani Science and Technology University, Tangail-1902

M. Rehnuma
Department of Environmental Science and Resource Management, Mawlana Bhashani Science and Technology University, Tangail-1902

S. S. Tithi
Department of Environmental Science and Resource Management, Mawlana Bhashani Science and Technology University, Tangail-1902

M. H. Kabir
Department of Environmental Science and Resource Management, Mawlana Bhashani Science and Technology University, Tangail-1902

L. Sarkar
Department of Environmental Technology, Khulna Polytechnic Institute, Khulna-9000

Abstract/ Executive Summary:

The study was conducted to know the status of water quality of the Ramna, Crescent and Hatirjheel lakes in the Dhaka city. Water samples were collected from three different points of each lake and analyzed for various physicochemical parameters including temperature, pH, EC, TDS, DO, BOD, hardness, alkalinity, acidity during the period from November 2013 to April 2014. The mean temperature 22.54, 24.59 and 24.24°C; EC 15400, 282.00 and 618.27 μScm-1; TDS 85.38, 155.60 and 339.90 ppm; pH 7.73, 7.85 and 7.67; DO 3.51, 3.92 and 3.65 ppm; BOD 0.93, 0.73 and 3.15 ppm; hardness 95.00, 108.56 and 105.11 ppm; alkalinity 48.9, 120.7 and 249.1 ppm, and acidity 2.18, 2.67 and 2.05 ppm were investigated from Ramna, Crescent and Hatirjheel lakes, respectively. Lower concentration of DO was observed in all three lakes that severely harmed the aquatic organisms and degrade their habitat. The comparative study demonstrated that the concentration of BOD, EC, TDS, alkalinity and acidity of Hatirjheel Lake was higher than Ramna and Crescent lakes which indicated pollution of the lake water. The rain and storm water runoff, lack of awareness of people were responsible for the pollution of Ramna, Crescent and Hatirjheel lakes water. Connection of the sewerage line with the rain water collection channels and mixing of solid waste with lake water are the main reasons for pollution of Hatirjheel lake. Poor water quality of these lakes affects the ecosystem and aesthetic beauty negatively. To maintain the sound environment and healthy ecosystem of the lakes and the surrounding areas need proper management and monitoring and implementation of existing laws and regulations. Moreover public awareness is necessary otherwise it is hardly possible to maintain sound water quality of these three lakes.

Keywords: Crescent, Hatirjheel, Ramna, Water pollution

Location: Ramna, Crescent and Hatirjheel lakes in the Dhaka city

Start Date: 00-11-2013

End Date: 00-04-2014

Program Area: Crop-Soil-Water Management

Commodity: Water quality

Objectives:

The water quality parameters were investigated from, Ramna, Crescent and Hatirjheel Lakes and compared with relevant standard levels to know the present status of water quality of the lakes.

Methodology:

Study area
The study was conducted at Ramna, Crescent and Hatirjheel Lakes in Dhaka city for a period of six month from November 2013 to April 2014. Ramna Lake is situated in Ramna thana and it is a part of the Ramna park. The area of Ramna Park is 277209.64 m². In 1949 Ramna Lake was made. Institute of Engineering (IEB) is in the south-east of Ramna Lake where Shishu park is situated in the southwest. Maximum portion of the park is in the north-west part. The area of Ramna Lake is 8.76 acre. Its width varies from 9-94 m to some points and the lake is 812 m long. Crescent Lake is part of Chandrima Uddan which was approximately within latitude 23°45'53"N and longitude 90°22'43"E. Crescent Lake is situated in the road beside the Jatiyo Sangshad Bhaban in Dhaka (Razzak et al., 2013). Hatirjheel is located at the centre of the capital, Dhaka. It has latitude of 23°44′58.47″N and longitude of 90°23′48.35″W. The place is surrounded by Tejgaon, Gulshan, Badda, Rampura, Niketon, Maghbazar, etc.
Sample collection
The water samples were collected from three sites of each lake during November 2013 to April 2014 where November 2013 to January 2014 was considered as post-monsoon and February to April 2014 was considered as pre-monsoon season. Plastic bottles with stopper having a volume of 500 ml each and marked with lake’s name and sampling point were used for collection of water samples. Before collection of water samples bottles were cleaned and washed with detergent solution. Then the sampling bottles rinsed with deionized water and dried. After sampling, bottles were screwed carefully and marked with the respective identification number. Necessary information for each sample such as date of collection, location, time of collection was recorded in note book. Simple random sampling was used for the primary data collection.
Sample analysis
The water quality parameters such as temperature and pH were determined by the thermometer and digital pH meter (model- pH Scan WP 1, 2, Malaysia), respectively. The electrical conductivity (EC) and total dissolved solid (TDS) was measured by digital EC meter (model-HM digital, Germany) and digital TDS meter, respectively. Dissolved oxygen was determined by digital DO meter. Alkalinity and acidity were measured by titration method and EDTA method was used to determine the hardness of sample water. The BOD was measured by two steps where initial BOD (BOD1) was measured immediately after collection and after 5 days BOD (BOD5) was measured by incubation in the dark condition at 20 °C for 5 days. Then the total BOD (BOD1–BOD5) was measured.
Statistical analysis
The collected data were analyzed by using the software MS Excel. The findings of the study were presented as chart and tabular forms.

Source of Information: J. Environ. Sci. & Natural Resources, 8(1): 1-5, 2015 ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the investigation of water quality of the three lakes, it was observed that water of the Hatirjheel lake was severely polluted compared to the Ramna and Crescent lake. Water of Ramna and Crescent lakes were polluted mainly by visitation activity. Most of the visitors do not apply civic sense when they go to the study area. They carry with them soft drinks bottles, polythene filled with ground nut, biscuits and newspaper and leave those there after use. Since those are not removed, environment gets polluted. People also pollute water by bathing and washing clothes on the lakes. Mixing of waste water lines with the rain water inside Hatirjheel is the main reason of pollution. Waste water from different adjoining areas are released in the Hatirjheel canals and mixed with the rain water and made it difficult to keep the water clean. When it rains, solid waste mixed with it enters the Hatirjheel lake and thereby, pollutes the lake water. To recover the soundness of aquatic environment of the lakes, it is necessary to prevent or reduce processes which degrade or pollute lake water quality (storm water flow, sanitary water flow, stock piling of construction debris and solid wastes, unauthorized construction works in the vicinity of lake area, etc.), to create monitoring and maintenance cell, creating public awareness, preventing and controlling harmful discharges.

Knowledge Management: Journal