• Dr. Ramashray Prasad
• No Co-authors

ABSTRACT The planform of the channel is “plan-view” of streams seen in a panoramic view observed at a glance. Channels are products of several geographic and geomorphic components determined by numerous factors. Since channels are created by carving out the surface by exogenetic forces, they are formed by erosion and deposition. Therefore, dynamics of erosional and depositional components shape the layout plan of channels. Some of the important factors determining are volume and velocity of discharge, slope, structure and composition of rocks, climate and status of vegetative cover, land use and human footprint in the catchment. Change in any of these components is reflected on channel planform found in any particular area operated by any external processes. The Kosi River is notorious for its flood and an epitaph about the Kosi, “sorrow of Bihar” is very well suited since unknown time. The flood fury of this river has engulfed almost whole of north Bihar due to damaging potential of the river. It is an example of one the highest lateral shifting courses of rivers in the world. It has been embanked since more than 60-years, but still its lateral swing is continuing in spite of several engineering efforts. In this background, an attempt has been made here to (i) trace planform changes of the river during 1975-86, (ii) explain the causes of changes, and (iii) suggest some remedial measures for better stability of the river to avoid regular flooding. For the present study, secondary data has been used to substantiate the analysis. It is assumed that this study will help in finding out some long lasting solution to the flood in the Kosi particularly in the plains of Nepal and India (Bihar).

Keywords: Planform, Erosion and Deposition, channel and Non-channel Area, Lateral Shift, Discharge and Channel Energy

"CHANNEL PLANFORM CHANGES WITHIN TWO EMBANKMENTS OF KOSI: 1975-86", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 12, page no.b845-b866, December-2021, Available :http://www.jetir.org/papers/JETIR2112199.pdf

"CHANNEL PLANFORM CHANGES WITHIN TWO EMBANKMENTS OF KOSI: 1975-86", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 12, page no. ppb845-b866, December-2021, Available at : http://www.jetir.org/papers/JETIR2112199.pdf