ANALISIS PENGARUH PASANG SURUT TERHADAP WILAYAH POTENSI BANJIR ROB DI PESISIR KECAMATAN KALIANDA, KABUPATEN LAMPUNG SELATAN

WANTORO, ADAMAS and Diansyah, Gusti and Melki, Melki (2021) ANALISIS PENGARUH PASANG SURUT TERHADAP WILAYAH POTENSI BANJIR ROB DI PESISIR KECAMATAN KALIANDA, KABUPATEN LAMPUNG SELATAN. Undergraduate thesis, Sriwijaya University.

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Abstract

Rob merupakan banjir yang terjadi akibat pasang air laut yang menggenangi kawasan yang mempunyai ketinggian lebih rendah dari permukaan air laut pada pasang tertinggi. Tujuan dilakukannya penelitian ini adalah untuk mengetahui wilayah potensi banjir rob yang terjadi di Kecamatan Kalianda Kabupaten Lampung Selatan pada tahun 2020 hingga 2022. Data pasang surut yang digunakan terdiri dari data primer dan data sekunder. Data primer berupa data validasi pasang surut dilapangan selama 15 piantan, sedangkan data sekunder berupa data peramalan pasang surut yang diperoleh dari laman Badan Informasi Geospasial (BIG). Pendekatan Digital Elevation Model (DEM) dilakukan untuk menggambarkan kondisi topografi Kecamatan Kalianda. Hasil analisis pasang surut diperoleh nilai Formzahl sebesar 1,3 menunjukan tipe pasang surut campuran condong ke harian ganda. Nilai elevasi yang digunakan dalam memprediksi wilayah genangan rob adalah nilai koreksi HHWL, dimana nilai koreksi HHWL yang diperoleh adalah 0,84 meter. Luas wilayah potensi rob yang terjadi pada tahun 2020 hingga 2022 sebesar 110,592 ha meliputi Desa Agom 47,59 ha, Bulok 0,14 ha, Kalianda 0,912 ha, Merak Belatung 11,82 ha, Pauh Tanjung Iman 0,24 ha, dan Way Urang 49,89 ha. Wilayah potensi banjir rob diperoleh dengan membandingkan faktor pasang surut dan elevasi tanah. Rob is a flood that occurs due to tides that inundate areas that have an altitude lower than sea level at the highest tide.The purpose of this research was to determine the potential areas for rob flooding that occurred in Kalianda District, South Lampung Regency from 2020 to 2022. The tidal data used consisted of primary data and secondary data. The observasion of tide carried for 15 days as validation data, while the secondary data is in the form of tidal forecasting data obtained from the website provided by the Geospatial Information Agency (BIG). The Digital Elevation Model (DEM) approach was carried out to describe the topographical conditions of Kalianda District. The tidal analysis results obtained a Formzahl value of 1,3 which indicates the mixed tidal type tends to double daily. The elevation value used in predicting the tidal flood area is the HHWL correction value, where the HHWL correction value obtained is 0.84 meters.The potential rob flood area that occurs from 2020 to 2022 is 110,592 ha covering Agom Village with an area of 47,59 ha, Bulok covering an area of 0,14 ha, Kalianda covering an area of 0,912 ha, Merak Belatung covering an area of 11,82 ha, Pauh Tanjung Iman covering an area of 0,24 ha, and Way Urang covering an area of 49,89 ha. Where the potential for rob flooding is obtained by comparing the tide and ground elevation factors.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Digital Elevation Model (DEM), Kecamatan Kalianda, Pasang Surut, Rob
Subjects:	G Geography. Anthropology. Recreation > GC Oceanography > GC300-376 Tides
Divisions:	08-Faculty of Mathematics and Natural Science > 54241-Marine Science (S1)
Depositing User:	Users 11431 not found.
Date Deposited:	30 Mar 2021 06:34
Last Modified:	30 Mar 2021 06:35
URI:	http://repository.unsri.ac.id/id/eprint/44408

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