DISTRIBUTION FEATURES OF MEASURED WAVE CHARACTERISTICS IN COASTAL WATERS OF NINH THUAN PROVINCE, VIETNAM

Le Dinh Mau, Nguyen Van Tuan

Abstract


This paper presents the distribution features of wave characteristics based on the continued measurement wave data with interval of 1 hour from January to December 2013 in coastal waters of Ninh Thuan province. The study results show that the dominant wave directions were in East-North-East (ENE), East (E), South-South-East (SSE) and South-East (SE) with occurrence frequency of 36.7%, 20.5%, 18.2% and 11.6% respectively. During North-East (NE) monsoon the dominant wave directions were in ENE and E. During South-West (SW) monsoon the dominant wave directions were in SSE and SE. The remaining directions were rare. The maximum values of wave height (Hmax) was 4.84 m (11/2013), wave period (T) was 10.9 s (11/2013). The occurrence frequency of Hs ≤ 0.5 m was 43.9%, Hs ≈ 0.5–1.0m was 21.9%, Hs ≈ 0.5–1.0 m was 21.9%, Hs ≈ 1.0–2.0 m was 27.3%, Hs > 2.0 m was 6.8% and calm wave condition (Hs ≤ 0.25 m) was 8.1%. The duration and intensity of wave action were dominant in NE monsoon period.

Keywords


Significant wave height (Hs), maximum wave height, Ninh Thuan, monsoon, coastal zone.

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References


CEM, 2010. Coastal Engineering Manual. U.S. Army Corps of Engineers.

Le, D. M., Tran, H. L., Nguyen, M, C., 2015. Present state of ocean observation and service in Vietnam. Journal of Marine Science and Technology, 15(4), 309-319. DOI: 10.15625/1859-3097/15/4/7376.




DOI: https://doi.org/10.15625/1859-3097/18/4A/13633

Journal of Marine Science and Technology ISSN: 1859 3097

Published by Vietnam Academy of Science and Technology