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RISS 인기검색어
- 검색키워드
- 저자 : Samrat Majumdar (검색결과 2 건)
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Samrat Majumdar,Sujit Mandal 대한공간정보학회 2020 Spatial Information Research Vol.28 No.2
One of the important geo-hazards associated with a river is bank erosion. In recent years the district of Malda has been facing ravages of this hazard by the continuous left bank erosion by the river Ganga. Although the entire district has witnessed rapid bank erosion, the village of Panchanandapur has become famous in terms of this hazard as it has been at the receiving end for a major proportion. This paper focuses on the topography and land use of this area so as to understand the probable causal mechanism and vulnerability of Panchanandapur. Bank Erosion Hazardous Index and Near Bank Stress have also been done for stability measurements of both banks. Besides analysing the spatial variation in the aforesaid parameters, we have also postulated the favourable sites for the growth of settlements based on information obtained from the analysis. DEM based study and field-based land use morphology indicates that the current location of Panchanandapur Village is highly vulnerable to bank erosion as well as water logging since it is located between the natural levees formed by the Ganga River and one of its major distributaries, the Pagla. Needless to state that the village is at a significant lower elevation than the levees of Ganga and Pagla. Furthermore, this study has pointed out that the current levee of the Pagla is currently ideally suited for settlement growth as it appears to be reasonably inert to bank erosion and water logging.
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Samrat Majumdar,Mandal Sujit 대한공간정보학회 2021 Spatial Information Research Vol.29 No.1
River bank erosion is a hazardous problem of Malda district. Different parts of Malda are mainly eroded by hydraulic action of River Ganga. Bank assessment for non-point source consequences of sediment model is a well accepted process for predicting stream bank erosion hazard potential. In the present study, river bank stability condition has been measured form field survey on 15 sample segments for 185 km stretched from Rajmahal in Sahibganj district, Jharkhand to upstream of Farakka barrage in Malda. In the present study, bank erosion hazard index (BEHI), near bank stress (NBS) and field based data have been considered for assessing stream bank erosion. The result shows that BEHI is high along the whole given left bank line extension of river Ganga, among these BEHI is very high in the upper segments of the river and adjacent river bank line extension of Farakka barrage, overall NBS conditions along left river bank line are less compare to the BEHI. Dominant NBS conditions are belong under moderate to low along the river bank line. Loosely compact alluvial soil, sparse vegetation, steep slope, unorganized agricultural activities; sinuous channel can be responsible for river bank erosion hazard potentiality. On an average 976,068.991 metric tons of sediments entrains to the river in a year. Bank has experienced variants bank erosion from same BEHI and NBS combinations. So, it can be concluded that BEHI and NBS are potentially not significant model for predicting bank erosion in present study.
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