Abstract
Arial Khan River is right bank distributary of Ganges-Padma River systems flowing southwest region of Bangladesh. It is morphologically very dynamic meandering river: where the delta-building process is more active than other distributaries of Ganges-Brahmaputra-Meghna (GBM) River basin. This study analyzes, morphological variables- channel length, valley length, channel area and channel patterns of Arial Khan River. A major portion of this river divided into 8 reaches from starting point Faridpur to outlet point Barisal district in order to measure channel pattern changing trends. For the proper accomplishment of the findings section of this research, time-series satellite images (Landsat MMS, Landsat TM, Landsat ETM+ and OLI) of the year 1977 to 2018 has been taken for delineation of the morphological parameters using GIS and RS techniques. In this research, sinuosity ratio index technique has been applied to analyze the morphological parameter- channel pattern and its changing trends. From the satellite images analysis results over time span, it is observed that significant morphological changes have been occurred in the river length, valley length, river area and its channel patterns. Likewise, the hydro-morphological parameters of this river (e.g., discharge, flow velocity, the river depth, width and pattern) also significantly changed due to combined massive sediment deposition from Ganges-Padma and Brahmaputra-Jamuna River systems. These hydro-morphological changes increased flood hazard vulnerability, bank erosion and sand carpeting; which badly impacted on ecological diversity, agriculture system, rural settlements and transportation networks.
Highlights
Arial Khan is a perennial meandering river of Bangladesh
The results revealed that among the reaches of Arial Khan River reach (h) channel length is continuously increased from 10.51 km in 1977 to 15.98 km in 2018 (Table 3) which is located in Meghna estuary in Barisal district where delta forming process is more active
Arial Khan River is a branch of Ganges-Padma River which channel patterns changing trends is dynamic
Summary
Arial Khan is a perennial meandering river of Bangladesh. The hydro-morphological characteristics of this river are very dynamic in nature (Winkley et al, 1994). Due to dynamic behavior of the river, various fluvial hazards observed during recent decay. These fluvial hazards drastically damage agriculture crops, rural socio-economic infrastructures and waterway navigation systems (Islam, 2000). Hydromorphodynamic manners of this river made scarcity of water for irrigation in the agriculture crops land; extinction of aquatic fish resources, erosion of valuable flood plain and soil (Akter et al, 2013). Regular morphological response of this river creating human migration, making people landless and accelerating extreme of poverty
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
