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Author: William Scott Finlayson
Publisher:
ISBN:
Category : Hurricanes
Languages : en
Pages : 166
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Book Description
The characteristics of a growing sea during hurricanes are significantly different from those observed in ordinary storms since the source of energy generating waves is moving and the rate of change of wind speed is very fast. This thesis presents the results of a study on the growth of sea severity during hurricanes with the aid of a wave spectral formulation representing the associated sea conditions. Through analysis of spectra obtained from wave data during the growing stage of five hurricanes, it is found that the Modified JONSWAP spectral formulation well represents field data over a wide range of frequencies. This enables us to evaluate the general trend of the growth of a hurricane generated sea by applying the Modified JONSWAP spectrum. The two parameters (significant wave height and modal frequency) involved in the Modified JONSWAP spectrum are presented as a function of wind speed which permits the presentation of the growth of the wave spectrum as a function of wind speed. It is found that, during the growing stage of a hurricane, the increase in wave energy in the neighborhood of the modal frequency is much greater than that at any other frequency of the spectrum.
Author: William Scott Finlayson
Publisher:
ISBN:
Category : Hurricanes
Languages : en
Pages : 166
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Book Description
The characteristics of a growing sea during hurricanes are significantly different from those observed in ordinary storms since the source of energy generating waves is moving and the rate of change of wind speed is very fast. This thesis presents the results of a study on the growth of sea severity during hurricanes with the aid of a wave spectral formulation representing the associated sea conditions. Through analysis of spectra obtained from wave data during the growing stage of five hurricanes, it is found that the Modified JONSWAP spectral formulation well represents field data over a wide range of frequencies. This enables us to evaluate the general trend of the growth of a hurricane generated sea by applying the Modified JONSWAP spectrum. The two parameters (significant wave height and modal frequency) involved in the Modified JONSWAP spectrum are presented as a function of wind speed which permits the presentation of the growth of the wave spectrum as a function of wind speed. It is found that, during the growing stage of a hurricane, the increase in wave energy in the neighborhood of the modal frequency is much greater than that at any other frequency of the spectrum.
Author: Michel Ochi
Publisher: Elsevier
ISBN: 0080534244
Category : Science
Languages : en
Pages : 155
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Book Description
Hurricanes are one of the most adverse aspects of the ocean environment, with the potential to cause a disastrous event for marine systems in the ocean. Hurricane Generated Seas is an invaluable reference for all involved in the field of naval, ocean and coastal engineering. The work clarifies hurricane generated sea conditions necessary for the design and operation of marine systems in a seaway, and provides information for the protection of near shore / onshore structures and the environment at the time of hurricane landing. - Reveals Information vital for avoidance of disastrous events experienced by ships and offshore structures - Includes detailed analysis of hurricane sea wave data obtained by buoys
Author: I.R. Young
Publisher: Elsevier
ISBN: 0080543804
Category : Science
Languages : en
Pages : 307
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Book Description
The goals of wind wave research are relatively well defined: to be able to predict the wind wave field and its effect on the environment. That environment could be natural (beaches, the atmosphere etc.) or imposed by human endeavour (ports, harbours, coastal settlements etc.). Although the goals are similar, the specific requirements of these various fields differ considerably.This book attempts to summarise the current state of this knowledge and to place this understanding into a common frame work. It attempts to take a balanced approach between the pragmatic engineering view of requiring a short term result and the scientific quest for detailed understanding. Thus, it attempts to provide a rigorous description of the physical processes involved as well as practical predictive tools.
Author:
Publisher:
ISBN:
Category : Marine meteorology
Languages : en
Pages : 470
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Book Description
November issue includes abridged index to yearly volume.
Author:
Publisher:
ISBN:
Category : Marine meteorology
Languages : en
Pages : 380
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Book Description
Author: United States. Environmental Science Services Administration. Scientific Information and Documentation Division
Publisher:
ISBN:
Category : Marine meteorology
Languages : en
Pages : 222
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Book Description
Author: J.C.J. Nihoul
Publisher: Elsevier
ISBN: 0080870627
Category : Science
Languages : en
Pages : 509
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Book Description
Marine Forecasting
Author: Rattan K. Datta
Publisher: Concept Publishing Company
ISBN: 9788170225324
Category : India
Languages : en
Pages : 496
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Book Description
It is a well known fact that with the existing level of available technology, India can easily double its agricultural production and productivity. However, what is preventing us from achieving the above production level is the lack of an efficient administrative organisation which can take the benefits of technological advances to the door steps of farmers. It is clear that the most important issue to be tackled with regard to agricultural development in India in the coming years is not the fabrication of new technologies but development of efficient organisations which will transfer the available technologies into production accomplishments. Thus there is a need for scientific study of organisations dealing with agricultural development. There are very few investigations on functioning of agricultural administration .The present study has been undertaken to analyse the structure, processes and functioning of agricultural administration of agriculturally developed and less developed states. Does the agricultural administration of developed state significantly differ from that of less developed state significantly differ from that of less developed state? If yes, in what dimensions? The present study provides answer to this question. The book, divided into eleven chapters, gives a comparative account of different organisational aspects of department of agriculture in a developed and a less developed states. The items discussed include organisational context, structure, processes, personnel policies, and effectiveness.
Author: Jane Mckee Smith
Publisher: World Scientific
ISBN: 9814467561
Category : Technology & Engineering
Languages : en
Pages : 5136
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Book Description
This proceedings contains papers presented at the 31st International Conference on Coastal Engineering, which has held in Hamburg, Germany (31 August - 5 September 2008). The proceeding is divided into five parts: Waves; Long Waves, Nearshore Currents, and Swash; Sediment Transport and Morphology; Coastal Management, Environment, and Risk; and Coastal Structures. The papers cover a broad range of topics including theory, numerical and physical modeling, field measurements, case studies, design, and management. Coastal Engineering 2008 provides coastal engineers, scientists, and planners, with state-of-the-art information on coastal engineering and coastal processes.
Author: The SWAMP Group
Publisher: Springer Science & Business Media
ISBN: 1475760558
Category : Science
Languages : en
Pages : 248
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Book Description
Early in 1979, a group of wave researchers proposed a wave model inter comparison study to clarify the interrelations existing among the various wave models which have been developed in past years for real-time wave forecasting, wave statistics compilations, or hindcast case studies. The idea was immediately welcomed by the wave modeling community, and, finally, nine wave modeling groups from the United States, Japan, and Europe participated in the exercise. The principal results of this work are presented here jointly by the Sea Wave Modeling Project (swAMP) Group (the members of which are listed in Appendix A). Descriptions of the models used in the study are given in Part II of this volume. A more complete documentation of the entire set of numerical experiments is given in Part 2 of the Sea Wave Modeling Project (SWAMP group, 1982). The main purpose of the intercomparison study was to test our present understanding of the physics of . wind-generated surface waves from the viewpoint of wave modeling. Specifically, we wished to clarify the basic interdependence between understanding the physics of surface waves, repre senting the physics numerically, and predicting quantitatively the detailed space-time evolution of a two-dimensional surface wave spectrum for a given wind field. It was not our intent to carry out a model competition. In this sense there were no winners or losers: all models could claim specific strong points, and all displayed weaknesses in some areas.
