著者

林 昌奎 小林 豪毅 山西 一臣 鈴木 文博

出版者

The Japan Society of Naval Architects and Ocean Engineers

雑誌

日本造船学会論文集 (ISSN:05148499)

巻号頁・発行日

vol.2003, no.194, pp.241-246, 2003 (Released:2007-05-30)

参考文献数

8

被引用文献数

2

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Microwave remote sensing is effective technique for sea surface measurement. For example, it enables us to know the wind vector on global scale. In order to develop more advanced measurement, it is necessary to understand the mechanism of microwave scattering at sea surface. This phenomenon consists of two physical processes. One is the formation of sea surface by the composite action of wind, waves and currents, and the other is microwave scattering at that surface. Because these processes are so complicated, appropriate models are not established. In this paper, the relation between sea surface condition and microwave scattering is investigated. Microwave scattering from wind wave surfaces is measured in the experimental tank and the results are analyzed by scattering coefficients and Doppler spectra. In order to connect these values with water surface parameters, surface condition is investigated minutely. The energy of high frequency waves is expressed by the friction velocity, and so it is presumed that there is the universal law between friction velocity and scattering coefficient. Since wind-generated current exist, the usual dispersion relation is not available. Furthermore, very high frequency components move at the phase velocity of components near the spectral peak. The results of Doppler spectra agree with that phenomenon.

著者

小林 豪毅 林 昌奎 丸山 康樹

出版者

土木学会

雑誌

土木学会論文集. B2, 海岸工学 Journal of Japan Society of Civil Engineers. 土木学会海岸工学委員会 編

巻号頁・発行日

vol.73, no.2, pp.I_1453-1458, 2017

著者

中村 文則 小林 豪毅 高木 利光 児玉 敏雄

出版者

公益社団法人 土木学会

雑誌

土木学会論文集B2(海岸工学) (ISSN:18842399)

巻号頁・発行日

vol.67, no.2, pp.I_1056-I_1060, 2011

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Many concrete and steel structures near shoreline are damaged severely by generated salt spray from sea surface. To reduce the transportation of salt spray near shoreline is effective method of prevention of salt damage. In this study, to discuss the effect of the structure on the reduction of salt spray concentration, experiments of transportation of salt spray were carried out. The wind velocity and the distribution of salt spray concentration around the permeable structures were measured in the wind tunnel. In this result, the structure that set up filters can effectively reduce the transportation of salt spray concentration, the experiment data showed that the decrease of salt spray concentration is influenced from the salt amount of adhesion of structures.