Stability of micro-tidal inlets along coastlines dominated by littoral drift

Stability of micro-tidal inlets along coastlines dominated by littoral drift The dynamics of micro-tidal inlets is quite complicated as their stability is controlled both by the littoral drift and the tidal range. Thus the process of assessing their stability is not well understood and quite challenging. This paper brings out the process of assessing the stability aspects of inlets using numerical codes. The equilibrium between the longshore transport rate and spring tidal prism ensures the stability of inlet between ocean and estuary. However, any disturbance to this equilibrium leads to the closure of the inlets. The active movement of sediments in the surf zone are due to the long shore velocity, the driving force for the littoral drift, which is obtained with the application of time domain model, FUNWAVE, a public domain software. With the driving force thus obtained, the long shore transport is then estimated through empirical relations from which, the stability of the inlet is assessed. The spring tidal prism is the discharge of the flow entering into the ocean from inlets/estuaries. The flow velocity is determined by the application of shallow water model. The input data for the nearshore circulation due to waves and currents are mostly measured from the field. For the current study, the Kondurpalem inlet(14001′07″N, 80009′24″E)along the East coast of Indian peninsula is investigated and its seasonal variation is assessed. The stability state of the inlet is re-assessed by providing necessary training works. The stability of the trained inlet is found to be more stable and the minimum depth and width to be maintained in the inlet gorge can be established through this process. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Coastal Conservation Springer Journals

Stability of micro-tidal inlets along coastlines dominated by littoral drift

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Publisher
Springer Netherlands
Copyright
Copyright © 2017 by Springer Science+Business Media B.V.
Subject
Geography; Geography, general; Coastal Sciences; Oceanography; Nature Conservation; Remote Sensing/Photogrammetry
ISSN
1400-0350
eISSN
1874-7841
D.O.I.
10.1007/s11852-017-0537-1
Publisher site
See Article on Publisher Site

Abstract

The dynamics of micro-tidal inlets is quite complicated as their stability is controlled both by the littoral drift and the tidal range. Thus the process of assessing their stability is not well understood and quite challenging. This paper brings out the process of assessing the stability aspects of inlets using numerical codes. The equilibrium between the longshore transport rate and spring tidal prism ensures the stability of inlet between ocean and estuary. However, any disturbance to this equilibrium leads to the closure of the inlets. The active movement of sediments in the surf zone are due to the long shore velocity, the driving force for the littoral drift, which is obtained with the application of time domain model, FUNWAVE, a public domain software. With the driving force thus obtained, the long shore transport is then estimated through empirical relations from which, the stability of the inlet is assessed. The spring tidal prism is the discharge of the flow entering into the ocean from inlets/estuaries. The flow velocity is determined by the application of shallow water model. The input data for the nearshore circulation due to waves and currents are mostly measured from the field. For the current study, the Kondurpalem inlet(14001′07″N, 80009′24″E)along the East coast of Indian peninsula is investigated and its seasonal variation is assessed. The stability state of the inlet is re-assessed by providing necessary training works. The stability of the trained inlet is found to be more stable and the minimum depth and width to be maintained in the inlet gorge can be established through this process.

Journal

Journal of Coastal ConservationSpringer Journals

Published: Jul 29, 2017

References

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