Abstract
Ichamati is a meandering tidal river of West Bengal. While meandering, the river forms of sharp loops and horse-shoes. During the formation of those horse-shoes severe damage is caused to the valuable lands and villages located on its concave banks. It appears that the formation of horse-shoes along the course is a characteristic of the river itself. It has, therefore, been proposed to study its characteristics by model experiments and to devise adequate means of protection which will successfully combat the river against washing away the costly lands and villages. In this connection, it has been felt necessary to make borings at the most affected reaches of the river in order to find out the nature of the soils underlying the existing bank. In September 2013, heavy rainfall occurred in earlier days of second sampling and the place was inundated by local runoff. Water coming down from locality reduced the total soluble salt and salinity value to a great extent. But after recession of the monsoon the values of total soluble salt salinity gradually increased and in April 2014 the values of total soluble salts were well over 1000 ppm, i.e. the water was ‘brackish’ in salinity term. However, the suspended load values were well low to medium in all the cases. So the rapid deposition or silting is not likely to be correlated with the salinity increase or similar chemical reason. Siltation may rather be attributed to physical phenomena.
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The Paper is modified and enlarged version of the round table discussion on the “Physicochemical analysis of Ichamati River Sediment Using Geospatial Technology, North 24 Parganas, West Bengal, India”. The authors would like to thank Department of Geography and Environmental Management, Vidyasagar University, Midnapore for valuable suggestions in preparation of the manuscript. Sincere thanks to Dept. of Science and Technology, Govt. of West Bengal, India for according permission to publish the paper.
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Mondal, I., Bandyopadhyay, J. Physicochemical Analysis of Ichamati River and Estimation of Soil Parameters using Geospatial Technology. J. Inst. Eng. India Ser. E 97, 151–158 (2016). https://doi.org/10.1007/s40034-016-0086-4
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DOI: https://doi.org/10.1007/s40034-016-0086-4