Changes in river bed terrain and its impact on flood propagation – a case study of River Jayanti, West Bengal, India

Abstract

The investigation of river bed evolution is a principal part of fluvial morphology as it clarifies the procedure of bed deformation and morphological changes on alluvial river bed. Truth be told, the advancement of such bed landscape is additionally accompanied with the regular calamity like flood as it is anticipated due to immense precipitation in Himalayan foot slopes. The flood coverage area is expanding persistently while rainfall homogeneity is acceptable aside from extremely least number of years with sudden precipitation in most recent 101 years. The height of Jayanti riverbed had changed massively in most recent 101 years influencing the idea of channel planform accompanied by huge sediment aggradations and morphological changes which increases the expansion of flood water extension likelihood over bank. It has been discovered through the Fuzzy logic and PCA examination that precipitation does not assume a key job for flood water development yet dynamism of explicit river bed topography prompts bed rise that guarantees the flood propagation of the area unexpectedly.

Keywords

• river bed terrain
• evolution
• flood
• propagation
• fuzzy logic