IJAERS: Stability Analysis of Brahmaputra Riverbank at Neulgaon

IJAERS: Stability Analysis of Brahmaputra Riverbank at Neulgaon



N.Sarma, P.Dutta 

River bank erosion is a recurrent problem in
Jorhat district of Assam. Most of the rivers in Jorhat are shifting in
nature and thus river bank erosion is common. Erosion has lead to the
general widening of the river and instability of the river banks. River
migration and land degradation displaces large number of people
annually. This study intends to investigate the nature of river erosion
and provision of adequate structural measures. Hydrological data and
topographical sheet gathered from government departments have been used
as a basis for this project. Software analysis and chronological survey
techniques are used for the measurement of channel migration and thus
eroded distances. Based on software viz. ARCGIS, channel migration of
the river Brahmaputra in Neulgaon, Jorhat is found out. Secondary data
were also collected from the local residents to explain the erosion
status. The geotechnical properties of the eroded site are important
parameters for construction of anti-erosion structures. The design of a
structure mainly depends on the topography, hydrological data, and the
materials of construction, the mode of construction, and various dynamic
properties of the soil. Engineering tests (Field work & laboratory
work) has been performed to find its suitability as construction
materials. Embankments are the oldest known forms of flood protection
works and have been used extensively for this purpose. It is designed in
accordance with BIS code 12094:2000. Stability check is then carried
out to determine the safety factors. 



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