scholarly journals SHORELINE ADVANCEMENT BY SEA WALL AND GROYNES AT COCHIN

2011 ◽  
Vol 1 (7) ◽  
pp. 50
Author(s):  
M.G. Hiranandani ◽  
C.V. Gole
Keyword(s):  
High Water ◽  
Coastal Engineering ◽  
Littoral Drift ◽  
Protective Measures ◽  
Engineering Problems ◽  
Sea Wall ◽  
Protective Works

In the paper "Some coastal engineering problems in India" presented at the Vlth Conference on Coastal Engineering, a mention has been made about experimental protective measures consisting of one mile long sea wall and groynes adopted for giving protection to the coast near Cochin. The protective works mentioned in the above paper are now in operation for the last five years. As there are no major rivers there is very little littoral drift along this coast. The material eroded from the coast forms the main source of littoral transport. The data regarding high water and low water marks along the coast have been recorded, and statistically analysed to assess the efficiency of these measures in respect of shoreline advancement. Results are discussed in the paper. Some experiments have also been carried out in the prototype for a sea wall with bituminous grouting. Behaviour of this type of sea wall has also been discussed in the paper. Since the construction of the experimental measures, protective measures in the shape of either sea wall or sea walls with groynes have been further extended to a 10 mile long reach of the coast. The results of these new works, experiments carried out in a model for evolving the design of protective measures and model limitations have also been included. Fig. 1 shows the plan of the sea wall and groynes in one mile experimental reach.

The Study of the Impact for Coastal Engineering on High Water Level Induced by Storm Surges in Bohai Bay

2011 ◽  
Vol 94-96 ◽  
pp. 810-814
Author(s):  
Jin Shan Zhang ◽  
Wei Sheng Zhang ◽  
Chen Cheng ◽  
Lin Yun Sun
Keyword(s):  
Water Level ◽  
Storm Surge ◽  
Large Scale ◽  
Storm Surges ◽  
High Water ◽  
Coastal Engineering ◽  
Cold Wave ◽  
Bohai Bay ◽  
Ocean Engineering ◽  
The Impact

Bohai Bay is an semi-closed bay, the storm surge disaster is very serious in past. Now more and more large ocean engineering are built here, To study changes of storm surge induced by the construction of large-scale coastal engineering in Bohai Bay in present, 2D numerical storm surge model is established with large - medium - small model nested approach. The three most typical storms surges: 9216, 9711 and by cold wave in October 2003 are simulated in the condition of before and after implementation of planning projects in Bohai Bay. Changes of storm surge water level due to implementation of artificial projects are analysis in this paper.

scholarly journals ARTIFICIAL BREACHINGS OF BOT RIVER ESTUARY

1982 ◽  
Vol 1 (18) ◽  
pp. 148
Author(s):  
G.A.W. Fromme
Keyword(s):  
River Estuary ◽  
High Water ◽  
Coastal Engineering ◽  
Water Levels ◽  
Freshwater Lake ◽  
Management Policy ◽  
Western Cape ◽  
National Research Institute ◽  
Conflicting Interests ◽  
Sand Bar

During the flood year of 1981 the "Bot River Vlei", one of the largest lagoons in the south-western Cape of the Good Hope was opened to the sea by two artificial breachings of the sand bar which were aimed at lowering the excessively high water levels in the lagoon, and at the re-establishment of estuarine conditions. The Coastal Engineering and Hydraulics Division of the National Research Institute for Oceanology of the CSIR surveyed and monitored the hydrological and sedimentological events in the Bot River lagoon and at the mouth channels in an attempt to formulate a future viable management policy, which had to take into account the conflicting interests of the defenders of continued artificial breachings and of those who advocate conditions of a closed estuary which will eventually change into a coastal freshwater lake.

Engineering geology of Quaternary soils: II Methods of treatment

1991 ◽  
Vol 7 (1) ◽  
pp. 39-62 ◽  
Author(s):  
F. G. Bell
Keyword(s):  
Thermal Stabilization ◽  
High Water ◽  
Ground Freezing ◽  
Wide Range ◽  
Water Tables ◽  
Pore Water Pressures ◽  
Engineering Problems ◽  
Electro Osmosis ◽  
Introductory Paper ◽  
Methods Of Treatment

AbstractThe various soils of Quaternary age present a wide range of engineering problems such as low density, low strength, high compressibility, high permeability, collapsibility and high swell/shrink potential, as well as difficulties caused by the presence of high water tables and zones of high pore water pressures. This introductory paper describes a number of methods of ground treatment that can be used to alleviate these problems including exclusion techniques, grouting, ground freezing, drainage and groundwater lowering techniques, electro-osmosis and electro-chemical stabilization techniques, compaction and reinforcement, and methods of chemical and thermal stabilization.

Smoothed Particle Hydrodynamics for coastal engineering problems

2013 ◽  
Vol 120 ◽  
pp. 96-106 ◽  
Author(s):  
A. Barreiro ◽  
A.J.C. Crespo ◽  
J.M. Domínguez ◽  
M. Gómez-Gesteira
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Coastal Engineering ◽  
Engineering Problems ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

scholarly journals INCIPIENT MOTION OF PARTICLES UNDER OSCILLATORY FLOW

1982 ◽  
Vol 1 (18) ◽  
pp. 94
Author(s):  
L. Lenhoff
Keyword(s):  
Reynolds Number ◽  
Sediment Transport ◽  
Oscillatory Flow ◽  
Coastal Engineering ◽  
Incipient Motion ◽  
Flow Data ◽  
National Research Institute ◽  
Predictive Equations ◽  
Engineering Problems ◽  
Coastal Sediment Transport

This paper is aimed at the establishment of a generally applicable criterion for the onset of grain motion under the influence of oscillatory flow. Data from previous studies are used in a dimensional analysis and an empirically derived relationship between the dimensionless parameters R* (shear Reynolds number) and D* (dimensionless grain parameter) is proposed as a criterion to be used in coastal engineering problems. This study forms part of a larger programme by the Sediment Dynamics Division of the National Research Institute for Oceanology in Stellenbosch, RSA, which is aimed at the reevaluation and updating of the input parameters and relationships for the predictive equations for coastal sediment transport.

scholarly journals DYNAMIC WAVE SETUP

1988 ◽  
Vol 1 (21) ◽  
pp. 74 ◽  
Author(s):  
Jen-Men Lo
Keyword(s):  
Wave Spectrum ◽  
Low Frequency ◽  
Storm Surges ◽  
Coastal Engineering ◽  
Radiation Stress ◽  
Steady Wave ◽  
Wave Setup ◽  
Engineering Problems ◽  
Stress Term ◽  
Dynamic Wave

The wave setup for a given wave spectrum was re-evaluated with the radiation stress term including the low-frequency terms. This setup which is referred to here as "dynamic wave setup", was compared with the steady setup, which is generated by including only the non-periodic radiation stress terms. The results of the study showed that the dynamic wave setup is greater than the steady wave setup, sometimes almost double its value. Therefore, the dynamic wave setup is important for engineering applications, particularly in the study of storm surges and coastal engineering problems.

scholarly journals VARIATION IN GREAT LAKES LEVELS IN RELATION TO ENGINEERING PROBLEMS

2000 ◽  
Vol 1 (4) ◽  
pp. 17
Author(s):  
W. E. McDonald
Keyword(s):  
Great Lakes ◽  
High Water ◽  
Water Levels ◽  
Natural Phenomena ◽  
Lake Levels ◽  
Water Demands ◽  
Property Owners ◽  
Engineering Problems ◽  
History Of ◽  
Conflicting Interests

Throughout the recorded history of the Great Lakes, the fluctuation in their water levels has created engineering problems generally unique in relation to coastal engineering. In periods of low water, demands are heard from navigation and power interests to raise the levels. In periods of high water appeals are made by shore property owners to lower the levels. Such conflicting interests present major engineering problems, the nature of which during a given period of time reflect the long-range upward and downward trend in lake levels due to natural phenomena.

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