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Dutta, M. K.
- Geotechnical Properties of the Bank Sediments along the Dhansiri River Channel, Assam
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Authors
Affiliations
1 North East Institute of Science and Technology(NEIST- CSIR), Jorhat –785 006, IN
2 Jorhat Engineering College(JEC), Jorhat -785007, IN
3 North East Institute of Science and Technology(NEIST-CSIR), Jorhat –785 006, IN
1 North East Institute of Science and Technology(NEIST- CSIR), Jorhat –785 006, IN
2 Jorhat Engineering College(JEC), Jorhat -785007, IN
3 North East Institute of Science and Technology(NEIST-CSIR), Jorhat –785 006, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 78, No 2 (2011), Pagination: 175-183Abstract
The bank sediments along the extremely meandered Dhansiri River channel, a south bank tributary of the mighty Brahmaputra River, with erosion potentiality have been investigated to evaluate its certain geotechnical characteristics. The study has shown that the bank sediments are basically composed of CL and ML types of soil. These types of sediments are very much prone to liquefaction which in turn related to erosion susceptibility. The bank stability analysis has differentiated the studied stretch into unstable, at risk and stable zones. Most of the erosion affected zones along the channel reach under study are located within the unstable or at risk zones. The field study around Butalikhowa, Barguriagaon, Golaghat and Duchmuagaon areas along the channel with active erosion activity has supported our contention and practical utility of the present study. It is expected that such type of study will help in providing certain inevitable baseline information for various channel management practices for this extremely flood prone areas of Northeast India.Keywords
Bank Sediments, Geotechnical Properties, Dhansiri River, Erosion, Assam.References
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- Changes in Landuse and Landcover along the Dhansiri River Channel, Assam - A Remote Sensing and GIS Approach
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Authors
Affiliations
1 North East Institute of Science and Technology (CSIR), Jorhat - 785 006, IN
2 Jorhat Engineering College, Jorhat - 785 007, IN
1 North East Institute of Science and Technology (CSIR), Jorhat - 785 006, IN
2 Jorhat Engineering College, Jorhat - 785 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 79, No 1 (2012), Pagination: 61-68Abstract
Information on landuse/landcover change is a critical input for natural resource management policy decisions. Remote sensing data under GIS domain were utilized to evaluate the changes in land-use/land-cover (LU/LC) spanning a period of thirty three years during 1975 to 2008 along the Dhansiri River channel, Assam, India. Seven different types of LU/LC were categorized and out of them cropland was evident as the most important landuse/landcover practices followed by dense mixed jungle in 1975 and the settlement in 2008. Significant reduction (13.02%) in cropland area to settlement was observed. Moreover, teagarden also occupies 0.77% of the total area from cropland and open mixed jungle. The changes in the areas of swampy land as evident from the present study in turn will impact the environmental quality around it and will help to increase the surface run off leading to enhancement of erosion processes. It is believed that the present study will help to contribute towards sustainable land-use planning and management towards protection of extremely rich biodiversity of the North East India with mighty Brahmaputra River system.Keywords
Landuse, Landcover, Remote Sensing, GIS, Dhanasiri River Channel, Assam.References
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