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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences Journal of Marine Research
Agus ADS
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Earth & Planetary Sciences

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Kajian Perubahan Luas Laguna di Pantai Samas, Kabupaten Bantul dengan Menggunakan Citra Satelit Landsat Multi-temporal Saputra, Rifky; Subardjo, Petrus; ADS, Agus
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (196.221 KB) | DOI: 10.14710/jmr.v2i3.3130

Abstract

Samas beach lagoon is a unique and rare ecosystem, as well as being an area of tourism. One of the great river that empties into the Laguna Samas carry sediment material which will further lead to changes in the shape of land in the area. One impact of the change in shape in the area is the ever-expanding or narrowing of the land caused by the process of sedimentation. Sedimentation process is rapid and continuous this will damage the ecosystem Laguna Samas. To overcome this need to be monitoring the events that lead to environmental degradation. This activity is necessary to obtain accurate data and information and the actual on coastal and marine issues being faced today. The method used in this research is descriptive method, which is a study to create a picture of the situation or event that researched and studied in a limited time and place, to get an idea of the situation or conditions locally. In addition, this study also uses remote sensing techniques (visual interpretation using screen digitalizing techniques and field surveys). The material used in this study are Landsat images. Within 15 years, Laguna Samas and extensive changes shape significantly. Vast changes that have occurred in the lagoon research in the period between 1994 to 2001 had an area of 45.53 ha of erosion and accretion area of 13.58 ha. Changes vast lagoon in 2001 to 2005 was eroded area of 58.86 ha and 36.39 ha area accretion. And extensive changes in the lagoon in 2005 to 2011 had an area of 28.07 ha of erosion and accretion area of 58.38 ha. So, in 1994 until 2005, it had added vast lagoon waters, and in 2005 to 2011 extensive shrinkage or constriction waters. These results were obtained from the Landsat 5 satellite imagery overlay TM in 1994, Landsat 7 ETM 2001, Landsat 7 ETM 2005 and Landsat 7 ETM in 2011.
Pola Sirkulasi Arus Laut di Perairan Pantai Provinsi Sumatera Barat Denny Nugroho Sugianto; Agus ADS
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 12, No 2 (2007): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (918.804 KB) | DOI: 10.14710/ik.ijms.12.2.79-92

Abstract

Salah satu aspek oseanografi yang penting untuk mengetahui hidrodinamika dari suatu perairan adalah polapergerakan arus. Wilayah pantai Sumatera Barat memiliki topografi yang unik, terdiri dari banyak pulau, teluk dan tanjung serta terdapat pertemuan 2 massa air besar. Penelitian ini dilakukan untuk mendapatkan informasi mengenai kondlsi arus perairan Sumatera Barat. Metode pengukuran data arus di lapangan menggunakan metode Eularian. Sedangkan metode deskriptif digunakan untuk analisa hasil penelitian dan model matematis diperlukan untuk membantu analisis tersebut terutama untuk pola arus secara spasial. Penentuan lokasi sampling menggunakan metode pertimbangan (Purposive Sampling Method) sebanyak 3 lokasi. Pengambilan data lapangan dibagi menjadi 3 kondisi musim yaitu musim peralihan (27-30 April 2004), musim timur (9-12 Juli2004) dan musim barat (24-27 Nopember 2004). Lokasi penelitian berada di wilayah perairan sebelah barat Provinsi Sumatera Barat, yang meliputi perairan sekitar Padang, Kab. Padang (Lokasi 1), Pariaman, Kab.Padang Pariaman (Lokasi 2), dan Painan, Kab. Pesisir Selatan (Lokasi 3). Data survey lapangan yang diperolehakan digunakan sebagai veriffkasi hasil model matematis yang dibuat. Berdasarkan hasil penelitian diperoleh bahwa pola pergerakan arus di perairan pantai Suma tera Barat di pengaruhi oleh pasut serta pola arus regional di Samudera Hindia. Dari hasil pengamatan lapangan, kecepatan arus terbesar terjadi pada musim peralihan, dengan kecepatan maksimal mencapai 0,358 - 0,397 m/dt dengan arah dominan ke tenggara hingga selatan. Pada musim timur kecepatan arus maksimal mencapai 0,22 - 0,24 m/dt dengan arah dominan ke arah tenggara. Sedangkan pada musim barat kecepatan arus maksimal 0,22-0,29 m/dt dengan arah dominan kearah utara hingga selatan.Kata kuncl: Oseanografi, Arus, Pasut, Model, Sumatera Barat.
Co-Authors Denny Nugroho Sugianto Petrus Subardjo Rifky Saputra