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Silt mitigation measures for a navigational channel in a complex estuary

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Title Silt mitigation measures for a navigational channel in a complex estuary
 
Creator Ranganath, L. R.
Krishna, B.
Nagendra, T.
 
Subject Tide
Wave
Dredging
Silt mitigation
Deposition
 
Description 1370-1377
Planning of port development projects in a deltaic estuary is a tricky
job and it becomes highly complex in the case of determining potential
sedimentation and erosion rates in dredged channels. But accurate dredging
projections are crucial for economic feasibility analysis in addition to
assessing the impact of new structures interfering with the natural processes
on the adjacent shoreline and the morphology of the system. Silt mitigation
measures are necessary to reduce the siltation in the navigational channels. In
this study we consider a range of approaches for evaluating sediment transport
for evolving a new navigation channel and necessary silt mitigation measures
for harbour planning, and present detailed case from West coast of India. A
depth-averaged numerical model for the erosion, sedimentation and transport of
cohesive sediment is applied to the estuary. This study is based on the
numerical simulation of the mean river discharge and the tidal forcing. The
hydrodynamic models were calibrated against field measurements corresponding to
the period in which the experimental data were registered. The site described
is representative of a very complex coastal environment. The Tapi Estuary in
Hazira is a unique dynamic estuary in Gulf
of Khambhat on the West coast of India with
large tidal range, non-perennial river discharge and high sediment loads of
sand, silt and clay presenting challenges for navigation and dredging. The
approaches include preliminary site investigations and data collection, basic
sediment transport theory, and a range of numerical modeling techniques that
can be applied to determine sediment erosion, transport and deposition.
 
Date 2016-06-27T04:52:49Z
2016-06-27T04:52:49Z
2014-07
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/34456
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.43(7) [July 2014]