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IJSTR >> Volume 9 - Issue 3, March 2020 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Assessment Of Building Tools Of Spouse Breakers In The Aspect Of Oceanography Hydro In Coastal Waters Demak

[Full Text]

 

AUTHOR(S)

Gentur Handoyo, Purwanto, Denny Nugroho Sugianto, Siti Maisyarah, Baskoro Rochaddi, Elis Indrayanti, Sri Yulina Wulandari

 

KEYWORDS

SMB, Overtopping, peak elevation, Bedono.

 

ABSTRACT

Since 2011, Central River Region Pemali Juana under the Ministry of Public Works built a breakwater around Morosari, Pandansari and Tambaksari region, which is included in Bedono village, Sayung District, Demak District. However, this structure still needs to be re-examined, because the structure that was often called by the local people as “tahu – tahu” had not functioned optimally. This study aims to evaluate how this breakwater should be built, both in terms of location and elevation of the structure. This research consist of primary data which is wave data, and secondary data which is RBI map, tidal data, wind data, and data of structure’s design. Measurement of wave data used ADCP Sontek Argonout placed at coordinates 060 52' 41,34 " Southern Latitude and 1100 26' 53,31" Eastern Longitude at a depth of 12 meters, for 5 days (23-27 July 2017) with a recording interval of 10 minutes. The method used in this research is quantitative. The calculation analysis used 11 years of forecast data (2007-2017) using SMB method and tidal calculation with Admiralty method. Based on the data analysis of forecast data of all seasons, the value of breaking wave height (Hb) ranged from 0,354 – 0,638 m, breaking wave depth (db) ranged from 0,417 – 0,752 m. According to structure design data, the break water is built at a depth of 0,6 m, so the building is considered optimal for breaking the wave. The results of the wave run-up calculation ranged from 0,388 – 0,687 m, while the value of h-ds ranged from 0,153 – 0,206 m. The run-up value is greater than the value of h-ds, as the result the building encounter overtopping in each season. Based on the calculation of the peak elevation design, the break water structure should be built at a peak elevation of 3,18 m or more so that the building can function optimally.

 

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