Simulasi Numerik Pengaruh Pasang Surut terhadap Arus Rip di Pantai Klayar, Kabupaten Pacitan, Provinsi Jawa Timur

Tiffany, Vierda Khairene (2023) Simulasi Numerik Pengaruh Pasang Surut terhadap Arus Rip di Pantai Klayar, Kabupaten Pacitan, Provinsi Jawa Timur. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pantai Klayar merupakan wilayah pantai selatani provinsi Jawa Timur yang berhadapan langsung dengan Samudera Hindia. Pantai Klayar terletak di Kecamatan Donorojo, Kabupaten Pacitan. Wisatawan Pantai Klayar semakin meningkat tiap tahunnya, namun tidak sedikit pula wisatawan yang menjadi korban terseret arus rip. Tercatat pada tahun 2009-2022 terdapat 3.123.166 pengunjung di Pantai Klayar, namun lebih dari 30 orang terseret arus rip. Arus rip muncul di lokasi dan waktu yang sulit ditebak oleh orang awam. Arus ini sekilas tampak tenang namun menghanyutkan dan biasanya terjadi pada daerah surfzone. Pemodelan numerik menggunakan perangkat lunak Delft3D digunakan dalam penelitian ini untuk mengamati pengaruh pasang surut terhadap arus rip di tiga titik lokasi penelitian. Data primer dan sekunder digunakan dalam input pemodelan. Data primer yang digunakan berupa data pasang surut dan arus yang diukur menggunakan ADCP, serta batimetri yang diukur menggunakan echosounder. Data sekunder yang digunakan berupa data gelombang yang bersumber dari BMKG. Hasilnya ditemukan bahwa arus rip terjadi di ketiga titik lokasi penelitian dengan tipe yang berbeda – beda. Lokasi A dan B termasuk tipe arus rip yang dikontrol oleh batas/tanjung Pantai Klayar yaitu shadow rips dan deflection rips. Sedangkan pada lokasi C termasuk tipe hydrodynamically-conrolled rip currents. Kecepatan arus rip terbesar terjadi pada saat kondisi muka air laut menurun. Hal itu dikarenakan ketika surut aliran arus akan terpengaruh gravitasi yang membuat arus lebih cepat mengalir dari daerah potensial tinggi menuju rendah.
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Klayar Beach is on the south coast of the province of East Java which is directly across from the Indian Ocean. Klayar Beach is in the area of Donorojo, Pacitan Regency. Tourists to Klayar Beach are growing every year, but there are not many tourists who are victims of the rip currents. It was recorded that in 2009-2020 there were 3,123,166 visitors to Klayar Beach, but over 30 people were carried away by the rip currents. Rip currents occur in places and moments that are difficult for the lay person to predict. At first glance, this current seems quiet but disappears and usually happens in the surf zone. Numerical modeling using the Delft3D software was used in this study to observe the effect of tides on rip streams at three points in the study site. Primary and secondary data used for modeling purposes. The primary data used are tidal and current data measured using ADCP, as well as bathymetry measured using an echo sounder. The secondary data used are wave data obtained from the BMKG. The results showed that rip currents occurred at three research points with various types. Locations A and B are rip current types which are controlled by the Klayar Beach boundary/headland, namely shadow rips and deflection rips. While at location C, it is a type of hydrodynamically-controlled rip currents. The highest rip current velocity occurs when the sea level goes down. When the tide is low, the flow of water is affected by gravity, which accelerates the flow of water from high-potential areas to low-potential areas.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Rip Current, Tidal, Wave, Delft3D, Klayar Beach, Beach Tourism, Arus Rip, Pasang Surut, Gelombang, Pantai Klayar, Wisata Pantai
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) > G70.212 ArcGIS. Geographic information systems. G Geography. Anthropology. Recreation > G Geography (General) > G70.217 Geospatial data G Geography. Anthropology. Recreation > GC Oceanography
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Vierda Khairene Tiffany
Date Deposited:	14 Jul 2023 15:04
Last Modified:	14 Jul 2023 15:04
URI:	http://repository.its.ac.id/id/eprint/98478

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