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Paper Details

Seasonal Variation of Physicochemical Parameters of Selected Floodplain Wetlands of West Bengal

Golam Ziauddin, S. K. Chakraborty, A. K. Jaiswar and Utpal Bhaumik1

Journal Title:Journal of Chemical, Biological and physical sciences

The meandering nature of the river Ganga in its lower course in West Bengal has given rise to a large number of floodplain wetlands, mostly open-type of ox-bow lakes, mainly in the districts of Burdwan, Nadia and North 24 Parganas. Floodplain wetlands are considered among the most productive ecosystems and play a very important role in socio-economic condition of the region as they are used for commercial fishery. Realizing the importance of such wetlands and paucity of literature on the physicochemical characteristics of this ecosystem, investigations were carried out in Kole beel, an ox-bow lake formed near Somra bazar in Hooghly district, during the period 2011-2012. An investigation was carried out in two floodplain wetlands with open (Kole) and closed (Suguna) system. Seasonal fluctuations in water column were conspicuous and mostly dependent on the replenishment resources and volume. Studies were undertaken to assess the general physico-chemical condition of water during this period. The lake is infested with dense growth of aquatic vegetation belonging to the submerged, floating and emergent types, providing diverse habitats for different faunal communities. It is alkaline in nature with the pH varying between 7.5-8.4. The dissolved oxygen content and Secchi Disc transparency values reflect the pristine condition of the water. The water was moderately hard and the nutrients were present only in trace amounts.