Remote sensing based innovative solution of river morphology for better flood management
Khurram Chohan, Sajid Rashid Ahmad, Ather Ashraf, Muhammad Kamran, Rizwan Rasheed
Abstract
Land and existing resources in the riparian zone of the river are largely affected by the changing morphology. An efficient and sustainable disaster management and planning could not be possible without the knowledge of river morphology. The present study employed GIS&RS based approach to investigate river morphology of Chenab River from headworks Qadirabad to Talibwala Bridge. The study area is divided into seven sections based upon the heuristic approach. Temporal Statistics have revealed that the reach faced abrupt changes at sections 1, 2, 3 and 6 after 1979 due to high flood. The sinuosity of the reach ranges between 1.01 minimum to 1.57 maximum. Identified critical sections has highlighted the abrupt changes observed in the river with reference to the 1952 condition as base line of the river. Abrupt changes in the sinuosity index have indicated that the river topography is incised by the widening, shifting and migration of channels. Section-wise sinuosity and migration of the channels could help to the disaster managers to understand future planning and sustainable river training works. This research also provides basis for the feasibility study of storage dam at Chiniot which is being planned downstream to Talibwala Bridge on Chenab River.