Research Paper
Year: 2021 | Month: December | Volume: 8 | Issue: 12 | Pages: 356-373
DOI: https://doi.org/10.52403/ijrr.20211244
Sediment Load Concentration and Resultant Channel Planform in the Lower Gandak Plain
Ramashray Prasad1, Jitendra Rishideo2
1Associate Professor, Dr. Bhimrao Ambedkar College, University of Delhi, Main Wazirabad Road, Yamuna Vihar, Delhi- 110094.
2Assistant Professor, Kalindi College, University of Delhi, East Patel Nagar, Delhi-110008.
Corresponding Author: Ramashray Prasad
ABSTRACT
Erosion, transportation and deposition by running water are closely related and these works are performed in association and not in isolation. One cannot be performed without others. These works are determined on other factors like topography, geology, structure and composition of rocks, slope, amount of water availability and its characteristics, climate etc. Huge catchment area of the Gandak River is lying in the Himalayan mountainous region. This region is receiving good amount of rainfall concentrated in four months of monsoonal period June to September (JJAS). This period has also high temperatures leading to large amount of glacial ice melt. Hence, enormous water is drained off the mountain steep slope. The Himalaya is very young and has fragile rocks and ecosystem. Anthropogenic activities in those areas are primary cause, apart from natural weathering, for generation of more and more shattered materials which are brought by running water downstream much easily. Therefore, highly sediment concentrated water brings large quantity of loads. It is deposited in suitable conditions along its paths in the plain and with flood water. It results the formation of flood plain. According to the erosion and deposition, different types of major and minor features are formed. In other words, water and sediment determine the layout of the plain appearance. In this background, it is attempted to (i) study sediment concentration in discharged water and (ii) illustrate the channel planform of the Gandak River in the plain. To achieve these aims, secondary data has been collected and analyzed. It is expected that this study will help in executing an integrated development plan for the flood affected area of Lower Gandak River Plain.
Keywords: sediment load, channel bars, channel planform, meandering, braiding, slope/gradient and channel cutoff.
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