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I Ketut Dharma Setiawan

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Author-ID : 2643288

Civil Engineering, Building, Construction & Architecture Engineering

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Identifikasi Pergerakan Sedimen Menggunakan Metode Pelacakan Benda Apung Di Pantai Nusa Dua Bali Dadang Karmen; I Ketut Dharma Setiawan; Fitri Riandini
JURNAL TEKNIK HIDRAULIK Vol 3, No 2 (2012): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Salah satu upaya pengamanan pantai yang ramah lingkungan dan cukup efektif dalam memperbaiki kerusakan pantai adalah pengisian pasir, karena pasir merupakan salah satu media peredam energi gelombang. Selain itu, dampak negatif terhadap lingkungan sekitarnya relatif kecil dibandingkan dengan bangunan pengaman pantai lain. Pelaksanaan pengamanan pantai dengan pengisian pasir telah dilakukan pada pantai-pantai wisata di Pulau Bali yaitu di Pantai Nusa Dua, Sanur,dan Kuta. Namun demikain, tidak semua upaya pengisian pasir berhasil sesuai dengan rencana. Pada beberapa pantai yang telah diisi pasir mengalami kehilangan pasir cukup besar, seperti di Pantai Nusa Dua, namun kehilangan pasir isian mencapai 40% selama 4-5 tahun. Untuk mengatasi hal tersebut telah dibangun dua buah groin tambahan yang diikuti pengisian pasir ulang (renourishment), tetapi dalam beberapa bulan kehilangan pasir terjadi kembali. Identifikasi pergerakan sedimen menggunakan metode pelacakan benda apung (bola pingpong diisi pasir) dilakukan untuk mengetahui pola pergerakan sedimen, sehingga dapat mendukung desain perencanaan pengelolaan pantai. Hasil identifikasi menunjukkan kecenderungan pergerakan sedimen dengan arah tegak lurus pantai. Berdasarkan kondisi tersebut untuk mempertahankan pantai yang telah diisi pasir perlu dilengkapi dengan struktur penahan pasir sejajar pantai yang bentuknya disesuaikan dengan kondisi lapangan.

Kinerja Prototipe Papan Osilasi Pada Pompa Flap Tenaga Gelombang Untuk Pemanfaatan Mata Air Di Pantai Banyu Asri, Kota Singaraja - Bali Juventus Welly Ginting; I Ketut Dharma Setiawan
JURNAL TEKNIK HIDRAULIK Vol 9, No 2 (2018): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

The supply of raw water is generally water available from several sources, which are available only on a river, lake, water wells and springs. The extraction can be done by drilling, damming water, and pumping. Management of the potential of raw water in an area is determined by geographical and geological conditions. One of the occurrences of springs found in coastal areas is influenced by marine and geological parameters which will further affect the method of capture, management, and utilization. This prototype of raw water supply has been installed in a location around the spring at Banyu Asri Beach, Singaraja City, Buleleng Regency, Bali Province in 2013. Data collection methodology is carried out by observing the wave data, pumping discharge and water salinity. These observations were made for two types of oscillation boards, namely using wood and fiber. From this technology, it is expected that the supply of a stable source of springs and the mineral content that is maintained even though the position of the spring is strongly influenced by the tide of the sea water which often inundates the discharge point of the spring. The spring at Banyu Asri Beach has been widely used by the community for drinking water and ritual worship. From the results of the performance of the prototype after being installed at the location of the spring, it has shown the ability to drain fresh water through pipelines towards the land, although the wave height that occurs in very small locations ranges from 0.10 to 0.30 cm and the discharge flow is up to 0.03 L / sec.

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