Kumaseh, Eunike Irene and Tatontos, Yuliana Varala and Sarapil, Costantein Imanuel
(2019)
ANALISIS LAJU SEDIMENTASI DI PERAIRAN TELUK TAHUNA KABUPATEN KEPULAUAN SANGIHE.
In: SEMINAR NASIONAL SAINS DAN TERAPAN 2019, 19-20 SEPTEMBER 2019, FAKULTAS MIPA UNIVERSITAS SAM RATULANGI.
Abstract
Tahuna Bay is flanked by 2 estuary, namely the Tidore estuary and Towoé estuary. There is Tahuna Nusantara Harbor near the Tidore estuary. So, there is a chance of sedimentation, which can affect the shipping line. We need to find out the sedimentation rate that occurred in the Tahuna Bay. Sediment traps installed consisted of 1 m iron, 2 inch pipe with a length of 15 cm and pipe cover. This device was installed at 3 Stations, Station 1 near Tidore estuary and Tahuna Nusantara Harbor, Station 2 in the middle of the waters and Station 3 located at Towo estuary. Observations are carried out every two weeks (14 days). Sedimentation rates at Station 1 ranged from 3.4 × 10-7 - 5.9 × 10-6 m3 / day with an average sedimentation rate of 2.9 × 10-6 m3 / day. Sedimentation rates at Station 2 ranged from 1.9 × 10-5 - 2.04 × 10-7 m3 / day with an average of 5.3 × 10-6 m3 / day. Sedimentation rates at Station 3 ranged from 0 - 1.02 × 10-5 m3 / day with an average of 7.2 × 10-6 m3 / day.
Keywords: sedimentation rate, Tahuna bay, Sangihe regency
ABSTRAK
Teluk Tahuna diapit oleh 2 muara sungai yaitu muara sungai Tidore dan muara sungai Towo’e. Pelabuhan Nusantara Tahuna terletak dekat muara sungai Tidore. Sehingga, besar peluang terjadinya sedimentasi, dimana hal tersebut dapat mempengaruhi jalur pelayaran. Sehingga, perlu dilakukan penelitian laju sedimentasi di perairan Teluk Tahuna. Perangkap sedimen yang dipasang terdiri atas besi 1 m, pipa PVC 2” dengan panjang 15 cm, penutup Pipa PVC 2”. Alat ini dipasang pada 3 Stasiun yaitu Stasiun 1 di dekat Muara Tidore dan Pelabuhan Nusantara Tahuna, Stasiun 2 berada di tengah Perairan dan Stasiun 3 terletak di muara Towo. Pengamatan dilakukan dua minggu sekali (14 hari). Laju sedimentasi pada Stasiun 1 berkisar antara 3.4×10-7 – 5.9×10-6 m3/hari dengan rata – rata laju sedimentasi 2.9×10-6 m3/hari. Laju sedimentasi pada Stasiun 2 berkisar antara 1.9×10-5 – 2.04×10-7 m3/hari dengan rata – rata 5.3×10-6 m3/hari. Laju sedimentasi pada Stasiun 3 berkisar antara 0 – 1.02×10-5 m3/hari dengan rata – rata 7.2×10-6 m3/hari.
Kata Kunci: Laju sedimentasi, Teluk Tahuna, Kabupaten Kepulauan Sangihe
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