Study on the Physico Chemical Properties of Water of Mouri River, Khulna, Bangladesh

Abstract

Water sample were collected from six different point of the Mouri River Khulna, Bangladesh with a regular intervals in the months of January-March 2002 for the analyzing different physicochemical parameters of the water. Total 22 different physicochemical parameters were investigated. Correlation and the t value among the parameters were also determined. In the present investigation the minimum and maximum value of water temperature, Transparency, Turbidity, TSS, TDS, Electric Conductivity, water pH, dissolve oxygen, free Carbon dioxide, Alkalinity, Acidity, Hardness, BOD, COD, Sulphate, Phosphate, Nitrite, Sodium, Calcium, Potassium, Manganese and Iron were noted as 21.6 and 32.2 degrees C; 15 and 66 cm; 16 and 22 NTU; 74 and 125 mg L(-1); 255 and 305 mg L(-1); 159 and 275 microS cm(-1); 1.10 mg L(-1) 8.18 mg L(-1); 7.5 and 8.3; 1.1 and 8.3 mg L(-1); 27.5 and 35.5 mg L(-1); 350 and 610 mg L(-1); 32.4 and 171 mg L(-1); 310 and 529 mg L(-1); 13 and 31 mg L(-1); 290 and 365 mg L(-1); 42046 and 57.35 mg L(-1); 4.89 and 11.46 mg L(-1); 0.54 and 1.82 mg L(-1); 16.8 and 33.9 mg L(-1); 1.5 and 6.9 mg L(-1); 49 and 94 mg L(-1); 31 and 59 mg L(-1); 2.6 and 3.8 mg L(-1), respectively. River water did not show any significant pollution during the present study. During the study period dissolved oxygen show direct relation with water temperature but inverse with BOD and COD.

Physico-chemical properties of Dhepa River in Dinajpur District of Bangladesh

“…Dissolved oxygen concentration in St.1 , St.3, St.4, St.5 and St.6 was above 5 mg/l which indicate a better condition for aquatic organisms. In the Buriganga River DO concentration was found 2-3 mg/l that indicates high rate of pollution (Moniruzzaman et al, 2009 Roy (1955) and (7.3-8.3) in Mouri river by Khan et al (2007) also showed a buffer condition which are in agreement with the finding of the present study.…”

“…The variations were further aggravated by heavy precipitation during the monsoon. The range of water temperature of Dhepa river is not similar to that obtained for river Talar 10.10-29.7°C (Alavi and Jafari, 2010) and for river Mouri 22.1-23.5°C (Khan et al, 2007). These might be different geological position of this river.…”

“…Shah et al (2008) was found 0.9 to 1.9 mg/l PO 4 -P concentration in Shibsha River which is higher than the findings of the present study. Phosphatephosphorous concentration was found to vary from 5 to 10 mg/l in Mouri River which indicate medium to high rate of pollution (Khan et al, 2007). However, PO 4 -P concentration in Dhepa River was less than one.…”

Surface and Ground Water Pollution in Bangladesh: A Review

“…The sample selection site should be representative of the water body being investigated. Sampling sites selection of Mouri river [64] did not explain well enough by providing information whereas the sampling sites selection in Buriganga river [20] industrial zone of Dhaka [97] were explained along with sufficient information. The study period for environmental research conveys a significant essence to evaluate the pollution status of water body.…”

“…In ground water of that region DO is negatively correlated with pH (r= -0.04) [68] which indicates that the correlation is completely depends on surrounding environment and sources. A correlation study of the Mouri river visualized that temperature, pH, hardness, TA, DO, free CO2 and sulphate were in positive correlation [64].…”