Flood Hazard Zonation Of Imphal River, Manipur, India,Using Aws Data
Lenin Laikangbam1, Chandramani Loukrakpam2, Thangjam Somchand Singh3
1Lenin Laikangbam, Department of Civil Engineering, Manipur University, Manipur Institute of Technology, Takyelpat, Imphal (Manipur), India.
2Chandramani Loukrakpam, Department of Civil Engineering, National Institute of Technology, Manipur Imphal (Manipur), India.
3Thangjam Somchand Singh, Assistant Professor, Department of Civil Engineering, Manipur University, Manipur Institute of Technology, Organization Name, Imphal, Imphal (Manipur), India.
Manuscript received on 18 April 2019 | Revised Manuscript received on 25 April 2019 | Manuscript published on 30 April 2019 | PP: 1676-1680 | Volume-8 Issue-4, April 2019 | Retrieval Number: D6689048419/19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Humans have been enduring a variety of natural disasters since time immemorial. Out of the several natural disasters, flood is one of the greatest and most common forms of natural disaster. Flood plains are generally thickly populated because of their economic significance. It is, therefore, essential to properly understand, utilize and manage floods for taking up preventive measures and mitigation works to minimize the risk of flood and its ill effects, such as, damage to lives, properties, infrastructure and crops. Flood considering as an agent of hazard pose a serious threat to the inhabitants of the flood plains and so it deemed necessary to focus on the mitigation and hazard management. A flood hazard map highlights the areas which are affected by or are vulnerable to flood. Such mapping is done with main emphasis being given on the management and reduction of impacts of hazard. In the present study, to prepare Flood hazard zone maps Remote Sensing (RS) and Geographic Information System (GIS) tools are employed on sub-catchment of the Imphal River basin in Manipur State, India. Present study is limited to factors such as rainfall distribution, drainage density, land use, soil type, and slope to prepare Flood hazard risk zone map. The thematic maps of these factors are prepared using ArcGIS, ArcSWAT and HEC-RAS tools. By giving ranks and weights to these thematic maps, the weightage maps are created. In this study Weighted Overlay Analysis method is adopted to prepare the Flood hazard risk zone map. The hazard map thus prepared shows the total areas subjected to the hazards, as very low, low, moderate, high and very high risk zones. Flood hazard assessment results so obtained may be utilized by land development planners as a part of an integrated approach to improve flood preparedness. The study area having experiences repeated flash flood in recent years, has been selected and aims to improve future land developments and raise community awareness of the area.
Keywords: AWS Data, Flood Hazard, Overlay Technique, RS&GIS
Scope of the Article: Computational Techniques in Civil Engineering