Detecting fishing boat activity is still a challenge for the biggest archipelago countries, such as Indonesia, to monitor the huge marine area. Space technology using sensors SAR to detect ships has been developed since 1985. However, the cost of using SAR images is one of the barriers to operational aspects, mainly for detecting fishing boats to deter IUU fishing activities. This research aims to evaluate the use of Sentinel 1-SAR imagery for identifying fishing boats from space. We used VIIRS data for validating the purposes. Both data sources could be accessed freely. The object detection process can be derived into three steps: pre-processing, object detection and object validation. We used the constant false alarm rate (CFAR) method to discriminate against objects at sea. To identify fishing vessels, we used the size of the vessels and the intensity of light captured by VIIRS. According to the findings, 21 boats were discovered using sentinel 1-SAR imagery and four boats using VIIRS data based on the the area of interest.
Seaweed is one of the fisheries commodities, which has been proven to improve the household income of coastal and small island communities in Indonesia for the last two decades. The global need for seaweed is rising, since it is used as a raw material for many industries, i.e.: food, pharmaceuticals, cosmetics, livestock feed, and fertilizers. These factors have encouraged the Government of Indonesia to increase the quantity and quality of seaweed commodities until it reaches a strategic position in the fisheries sector. One of the efforts in enhancing the data and information reliability, which will support all business actors from upstream to downstream; to accelerate the industrialization and production, resource sustainability, and improving the welfare of coastal and small island communities. This paper aims to provide an overview of the concept and design of seaweed information systems, based on the principles of traceability, sustainability, production process improvement, and system integration. It is expected that business actors, resources managers, and policymakers will take advantage of information system, where reliable data and information can be accessed easily in real-time.
ABSTRACT Tides and currents are essential factors that affect activities in estuary waters. The observation of tides and currents at the estuary of the Porong River is very important to support the development of Lusi Island, Sidoarjo Regency, East Java. The observation results in the form of tidal and current characteristics can be used to support the development of Lusi Island. Currently Lusi Island has been used as ecotourism to improve the economy of the people around the coast. This study aims to determine the characteristics of the tides and current velocity to support the development of Lusi Island. Analysis of the observed data was carried out to get an overview of the hydrodynamic characteristic at the study site. The results showed that the tidal range was 2.053 m and the average current speed was 0.25 m/s with a minimum current speed of 0 m/s and a maximum current speed of 0.86 m/s. The results of tidal analysis can be used as a elevation reference to construct buildings on Lusi Island, while the direction and speed of the currents can be used as initial information by the ship's captain as well as consideration for the location of the pier. The comparison model of tidal results obtained by the model that is closest to the measurement results is the Naotide model. The results of the most accurate model can be used to predict the height of the sea tides around Porong estuary. ABTSRAK Pasang surut dan arus merupakan faktor penting yang mempengaruhi aktifitas di suatu perairan muara. Observasi pasang surut dan arus di muara Sungai Porong sangat penting dilakukan untuk mendukung pengembangan Pulau Lusi, Kabupaten Sidoarjo, Jawa Timur. Hasil observasi berupa karakteristik pasang surut dan arus dapat dimanfaatkan untuk mendukung pengembangan Pulau Lusi. Saat ini Pulau Lusi sudah dimanfaatkan sebagai ekowisata guna meningkatkan ekonomi masyarakat sekitar pesisir. Penelitian ini bertujuan untuk mengetahui karakteristik pasang surut dan kecepatan arus yang dapat dimanfaatkan untuk mendukung pengembangan Pulau Lusi. Analisa data hasil observasi dilakukan untuk mendapatkan gambaran karakteristik hidrodinamika di lokasi penelitian. Hasil penelitian menunjukkan tunggang pasang surut sebesar 2,053 m dan kecepatan arus rata-rata 0,25 m/detik dengan kecepatan arus minimum 0 m/detik serta kecepatan arus maksimum 0,86 m/detik. Hasil analisa pasang surut dapat dimanfaatkan sebagai referensi pada perencanaan elevasi bangunan di Pulau Lusi, sedangkan arah dan kecepatan arus dapat dimanfaatkan sebagai informasi awal oleh nahkoda kapal serta pertimbangan penempatan dermaga yang akan dibangun. Hasil perbandingan model pasang surut diperoleh hasil model yang paling mendekati hasil pengukuran adalah model Naotide. Hasil model yang paling akurat dapat dimanfaatkan untuk prediksi elevasi pasang surut di sekitar muara Porong.
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