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Assessment of Some Water Quality Parameters of Bansi River in Monsoon and Winter Seasons

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

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

M. N. Hoque
Department of Environmental Science and Resource Management,Mawlana Bhashani Science and Technology University, Santosh, Tangail-1902, Bangladesh

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

Abstract/ Executive Summary:

The study was carried out to assess some physico-chemical water quality parameters and pollution scenario of the Bansi river. Water samples were collected from 8 different selected stations at Bagholpur to Nayarhat portion of Bansi river during winter and monsoon periods. The values of all parameters except temperature and DO were found higher in winter season compared to that of monsoon season. The water was slightly alkaline to strongly alkaline ranging from average pH value of 7.6 in monsoon to 8.5 in winter. The DO was found unsuitable for fisheries and irrigation purposes. The BOD was found extremely higher in winter than that of standard level set by the Government of Bangladesh. The mean values of EC in monsoon was 452.4 μs/cm, whereas in winter season it was 901 μS/cm, the value of DO in monsoon season was 4.7 mg/l whereas in winter it was 3.2 mg/l, the value of BOD in monsoon season was 8.9 mg/l and in winter season it was 31.4 mg/l, the value of TDS in monsoon season was 306.3 mg/l and in winter season it was 496 mg/l, the value of alkalinity in monsoon season 50.4 mg/l and in winter season it was 146.5 mg/l.

Keywords: Bansi river, Monsoon, Pollution, Water quality parameters and Winter Season

Location: Bansi River, Bagholpur to Nayarhat portion

Start Date: 00-00-2012

End Date: 00-00-2012

Program Area: Crop-Soil-Water Management

Commodity: Water quality

Objectives:

1. The study intends mainly to investigate several water quality parameters of the Bansi river in two seasons and the present level of pollution river water.

Methodology:

Water samples were collected from eight different locations along Bansi river in monsoon and winter seasons and analyzed the pH, EC, temperature, TDS, DO, BOD and alkalinity. Water samples were collected in triplicates from each location. The pH and temperature were determined immediately in the field and EC, TDS, DO, BOD and alkalinity were measured in the laboratory. Sampling Sites - The Bansi river is located within 23°93' to 23°81' north latitude and 90°21' to 90°26' east longitude. The water samples were collected from eight stations along Bansi river. The selected sampling sites were Baghalpur, Namabazar, Baktarpur, Jamsingh, Teuti, Ghugudia, Gokulnagar, Nayarhat. Sample collection - Water samples were collected from different stations in monsoon and winter seasons. Samples were collected in plastic bottles and their openings are closed properly. After sampling the bottles were screwed and marked with the respective identification number. Sample analysis - The pH was determined by digital pH meter (HANNA Instrument 211, Microprocessor pH). Total dissolved solids and electrical conductivity were determined by digital TDS meter and EC meter (HM digital). Temperature was determined by Thermometer. Dissolved oxygen was determined by Winkler’s Iodometric method, and Biological oxygen demand (BOD) and alkalinity were determined by titrimetric method. Alkalinity is measured and reported in terms of CaCO3 equivalent.

Source of Information: J. Environ. Sci. & Natural Resources, 5(2): 53 -57 , 2012; ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The values of all the water quality parameters were found higher in winter except temperature and DO. Some of the parameters were higher than the recommended value, which suggest that the Bansi river to a certain extent is polluted and the water is not completely safe for aquatic organisms, irrigation and other purposes. The causes of pollution should be determined and a proper planning for development and management of the river should be taken to control the pollution of the water of Bansi river.

Knowledge Management: Journal