Refine your search
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Ahmed, Istak
- Chronological Change of Land Use/Land Cover of the Muhuri River Basin from 1972 to 2016, Tripura, North-East India
Abstract Views :152 |
PDF Views:0
Authors
Affiliations
1 Department of Geography and Disaster Management, Tripura University, Suryamaninagar, Tripura West, Agartala – 799022, Tripura, IN
1 Department of Geography and Disaster Management, Tripura University, Suryamaninagar, Tripura West, Agartala – 799022, Tripura, IN
Source
Indian Journal of Science and Technology, Vol 10, No 22 (2017), Pagination:Abstract
Background/Objective: To present an investigation on the land use/land cover change of the Muhuri River basin with the help of Normalized Difference Vegetation Index (NDVI) analysis from the year 1972 to 2016. Methodology/ Analysis: The remotely based satellite images have been used to realise the LULC change of the study area. Within the period of 44 years (1972-2016), especially, the dense forests and open forests have been decreased by 93.17% and 77.54% respectively, whereas the main driving factors like settlement and rubber plantation have significantly gained 6.66 percent and 24.91 percent respectively. The NDVI results have articulated the fact that healthy vegetation with high DN value has declined significantly. Findings: The overall findings of the research indicates that the immigrants from the neighbouring country has mainly hampered the sustainability of the forest cover within the study area, whereas, their subsequent interferences had changed the existed land cover into different land use categories as settled area, agricultural land or rubber plantation; increase in degraded forest area becomes alarming for the life of the River Muhuri. Novelty/Improvement: Above all, the study has analysed some specific changes in the basin environment and raised the finger towards the sustainable use of the natural resource.Keywords
Accuracy, Forest Cover, Land Use/Land Cover, NDVIFull Text
- Bank Material Characteristics and its Impact on River Bank Erosion, West Tripura District, Tripura, North-East India
Abstract Views :176 |
PDF Views:76
Authors
Affiliations
1 Department of Geography and Disaster Management, Tripura University, Suryamaninagar 799 022, IN
2 Department of Civil Engineering, Indian Institute of Engineering Science and Technology, Shibpur, Haora 711 103, IN
1 Department of Geography and Disaster Management, Tripura University, Suryamaninagar 799 022, IN
2 Department of Civil Engineering, Indian Institute of Engineering Science and Technology, Shibpur, Haora 711 103, IN
Source
Current Science, Vol 115, No 8 (2018), Pagination: 1571-1576Abstract
In West Tripura district, river bank erosion becomes very common during monsoons along the Haora River and the Sonai Gang. Erosion occurs across 45.39 km (96% of the total length) of the Haora River and 20.12 km (90% of the total length) along the Sonai Gang. The main cause of river bank erosion in the district is the nature of bank material with respect to its erodibility factor (resisting force). The objectives of this study were to identify the nature of bank material of the rivers in West Tripura district and to analyse the shear strength of these materials. Samples were collected from twelve sites at various depths from top of the river bank up to the water level. Hydrometer test and grain size were also analysed. Uniformity coefficient (Cu) and coefficient of curvature (Cc) were calculated to identify the shear strength of bank soil. Tests revealed that the bank soils contain more than 90% sand and less percentage of silt and clay. This makes the soil non-cohesive and leads to maximum erosion.Keywords
Bank Erosion, Bank Material, Grain Size, Shear Strength, West Tripura District.Full Text
References
- Chatterjee, S. and Mistri, B., Impact o f river bank erosion on human life: a case study in Shantipur Block, Nadia District, West Bengal. Int. J. Humanities Social Sci. Invent., 2013, 2(8), 108-111.
- Rosgen, D. L., A practical method o f computing stream bank erosion rate. In Proceedings o f the 7th Federal Interagency Sedimentation Conference, USGS, Reston, VA, 2001, vol. 2, pp. 1-15.
- Bhowmik, M. and Das (Pan), N., Qualitative assessment o f bank erosion hazard in a part o f the Haora River, West Tripura District. In Proceedings o f the IGU, Rohtak Conference on Landscape, Ecology and Water Management (eds Singh, M., Singh, R. B. and Hassan, M. I.), Springer, Japan, 2013, vol. 2, pp. 193-203.
- Schumm, S. A. and Dumont, J. F., Active Tectonics and Alluvial Rivers, Cambridge University Press, 2000, p. 276.
- American Society for Testing and Materials (ASTM). Standard test method for particle-size analysis o f soils. Designation D2487, Philadelphia, 2011.
- Laskar, A. and Phukon, P., Erosional vulnerability and spatiotemporal variability o f the Barak River, NE India. Curr. Sci., 2012, 103(1), 80-86.
- Shrestha and Tamrakar, Bank erosion process and bank material loss potential in Manahara River, Kathmandu, Nepal. Bull. Depart. Geol., 2007, 10, 33-44.
- Connecticut River Joint Commissions, River dynamics and erosion. Lebanon, 1996, 1, p. 3.
- Thorne, C. R., Processes and mechanisms o f river bank erosion. In Gravel-bed Rivers: Fluvial Processes, Engineering and Management (eds Hey, R. D., Bathurst, J. C. and Thorne, C. R.), John Wiley, New York, 1982, pp. 227-271.
- Thorne, C. R., Bank erosion and meander migration o f the Red and Mississippi Rivers, USA. In Proceedings o f the Vienna Symposium on Hydrology for Water Management o f Large River Basins, 1991, pp. 301-313.
- American Society for Testing and Materials (ASTM). Standard test method for particle-size analysis o f soils. Designation D422-63, Philadelphia, 2007.
- Mamo, B. G., Banoth, K. K. and Dey, A., Effect o f strain rate on shear strength parameter o f sand. In Proceedings o f the 50th Indian Geotechnical Conference, Pune, India, 2015.
- Baishya, S. J., A study on bank erosion by the River Baralia (Bhairatolajan) in Melkipara Village o f Hajo Revenue Circle, Kamrup District, Assam, India. Int. J. Sci. Res. Publ., 2013, 3(9), 1-10.
- Terzaghi, K. and Peck, R. B., Soil Mechanics in Engineering Practice, John Wiley, New York, 1967, p. 729.