SEASONAL VARIATION IN TURBIDITY AND TOTAL DISSOLVED SOLIDS IN TANSA RIVER AT RAVADI, AKLOLI, VAJRESHWARI AND METIWALI OF THANE DISTRICT, MAHARASHTRA

摘要

The turbidity and dissolved solids play an important role in community structure due to their limited impact on primary production and trophodynamics. The increasing turbidity, decrease the penetration of sunlight. Similarly, a high level of TDS elevates the density of water, influence osmoregulation of freshwater animals and affect water use for drinking, irrigation and other domestic purposes. During the two years of study (1999-2001) on Tansa river, the range of turbidity estimated at different sampling stations was 51 to 130 ppm at station 1, 52 to 136 ppm at station 11, 51 to 141 ppm at station 111 and 53 to 139 at station IV. The values of TDS ranged between 500 to 660 ppm. 500 to 680 ppm, 500 to 660 ppm and 500 to 670 ppm at sampling stationsI, II, III and IV respectively. Values of both the parameters were observed maximum in monsoon, minimum in summer and relatively higher in winter, may be due to increase in plankton population and detritus.