Author(s): Keyur J. Prajapati, Sahita I. Waikhom, Sanjay M. Yadav
Linked Author(s): KEYUR PRAJAPATI
Keywords: Tapi river, river meandering, morphometric parameters, satellite images, temporal change
Abstract: A meander forms when moving water in a stream erodes the outer banks and widens its valley, and the inner part of the river has less energy and deposits silt. Meander characteristics play an important role in location, design and maintenance of hydraulic structures such as bridge, barrage, flood embankment and guide bank. Tapi river is known for occurrence of large floods due to influence of depressions originating from bay of Bengal traveling East to West causing rainfall, first in the upper catchments and then in lower catchments resulting of flood along its course. The present paper deals with the study of meander of Tapi River around Surat city. Temporal change study is done for Tapi River from Kamrej to Adajan using LANDSAT images from 1973, 1990, 2003 & 2015 i. e. a time span of approximately 13 years and toposheet of year 1950. Morphometric parameters such as Sinuosity Index and Island Area were measured to detect the periodical change. From the observation and analysis of temporal changes, it is deduced that the channel shifting is more at the ends of meander curvature to the apex of the meander portion of Tapi River. The study also indicates that the flood events and construction of Singanpore weir as major factor which causes erosion and sedimentation that ultimately leads to the shift of river banks and changes in the width of the river
Year: 2017