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All Journal Jurnal Perikanan dan Kelautan Jurnal Kelautan : Indonesian Journal of Marine Science and Technology Jurnal Perikanan dan Kelautan REKAYASA Jurnal Abdimas BSI: Jurnal Pengabdian Kepada Masyarakat DoubleClick : Journal of Computer and Information Technology JGISE-Journal of Geospatial Information Science and Engineering PENA AKUATIKA : JURNAL ILMIAH PERIKANAN DAN KELAUTAN Jurnal Laot Ilmu Kelautan Jurnal Ekologi, Masyarakat dan Sains International Journal of Science, Engineering and Information Technology Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Juvenil: Jurnal Ilmiah Kelautan dan Perikanan Journal of Coastal and Ocean Sciences Abditeknika - Jurnal Pengabdian Kepada Masyarakat Jurnal Abdimas Ekonomi dan Bisnis Indonesian Journal of Oceanography El-Jughrafiyah : Jurnal Geografi dan Terapannya Jurnal Miyang : Ronggolawe Fisheries and Marine Science Journal Jurnal Riset Kelautan Tropis (J-Tropimar) Jurnal Pengabdian Masyarakat Bangsa Abdisembrani: Jurnal Pengabdian Masyarakat Jurnal Kelautan dan Perikanan Indonesia Lempuk: Jurnal Ilmu Kelautan dan Perikanan Jurnal Perikanan dan Kelautan
Luhur Moekti Prayogo
Marine Science Study Program, Faculty Of Fisheries And Marine, Universitas PGRI Ronggolawe
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The Effect of Sunglint Correction for Estimating Water Depth Using Rationing, Thresholding, and Mean Value Algorithms Prayogo, Luhur Moekti; Basith, Abdul
Rekayasa Vol 14, No 1: April 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i1.8698

Abstract

Satellite-Derived Bathymetry (SDB) is an alternative for obtaining shallow water depth data. The existence of images with various resolutions, the availability of a complete image band can develop the extraction results. This method is based on the principle of the satellite's visible band to estimate water depth. The mapping of shallow water depth is dependent on water conditions, both its brightness and surface. When the sensor senses a water object, the reflected reflection comes from the surface, and some sensors cannot penetrate the water object. The sun's position and the sensor's point of view when sensing it results in interference from the water surface (Sunglint). The sunglint effect on the image can be reduced by performing RGB band correction with NIR Infrared. This study aims to demonstrate the effect of Sunglint's correction on three SDB approaches, namely Thresholding, Rationing, and Mean Value on Worldview 3 imagery in Karimunjawa Islands, Central Java. This study's results indicate that the Sunglint correction on Worldview 3 imagery affects the depth extraction results. The best results are shown by Sunglint's correction using the Thresholding approach (B2-B7), which produces the best correlation with R2 of 0.7364 and (B7-B2) with R2 = 0.7351. Contrastingly, the lowest correlation was generated using the Mean Value ((B2 + B7) / 2) approach without Sunglint's correction with R2 = 0.4015. So this research proves that the Worldview 3 image with Sunglint correction can provide bathymetry data, especially in shallow waters.
Investigation of the Tidal Character in Bawean Island East Java Using Admiralty Method Prayogo, Luhur Moekti; Hanif, Muhammad
Jurnal Perikanan dan Kelautan Vol 27, No 1 (2022): February
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.27.1.1-5

Abstract

Bawean Island is one of the islands in Gresik Regency, East Java, where almost all its territory is a coastal environment. This region's tidal oceanographic condition is critical because this area has a lot of potential for marine tourism and relatively shallow waters. This study aims to determine the tidal characteristics in the waters of Bawean Island, East Java, using the Admiralty method. This method was chosen because it can calculate the tidal component with only 15 days of data and can be used in various water conditions. The data used is tidal data from the Geospatial Information Agency (BIG) on November 1-15, 2020. From this research, it can be concluded that tidal analysis using the Admiralty method produces nine components, including M2, S2, N2, K1, O1, P1, M4, MS4, and K2. The four components determine the type of tide, namely O1, K1, M2, and S2, with amplitude values of 11.79347, 30.14857, 55.72241, and 63.69851. The calculation with the Formzahl number equation yields a value of 0.3512 (0.25 <F <1.5), which means that the tidal type in Bawean Island, East Java, has a mixed type with a semidiurnal tendency (double daily).
Perbandingan Metode Roberts’ Filter, Segmentasi dan Band Ratio Pada Citra Landsat 8 untuk Analisis Garis Pantai Prayogo, Luhur Moekti; Basith, Abdul
Rekayasa Vol 14, No 3: Desember 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i3.10300

Abstract

Computerization has an essential role in the field of remote sensing. Various methods for automatic coastline analysis continue to develop. This study aims to determine the performance of three methods, namely Roberts' Filter, Segmentation, and Band Ratio on Landsat 8 imagery, in producing land edges that are directly adjacent to the sea area (coastline). This study shows that the non-fusion image, the resulting edge, is less sharp than the fused image in the Roberts' filter method. The use of a 2x2 matrix on the Roberts' filter, the range of values from 0.52 to 0.56 in the segmentation method, and the Green Band Ratio - Near-Infrared produce various accuracy. The best method is produced by Band Ratio, where the edge detection results are close to the image's actual conditions. Meanwhile, unsatisfactory results are produced by the segmentation method.
UTILIZATION OF MULTITEMPORAL LANDSAT DATA FOR COASTLINE CHANGE ANALYSIS USING CANNY EDGE DETECTOR Luhur Moekti Prayogo; Zainul Hidayah
Jurnal Kelautan Vol 14, No 2: Agustus (2021)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v14i2.8924

Abstract

ABSTRACTThe development of remote sensing technology has experienced significant progress. This progress is marked by the availability of images of various resolutions with complete channels, open-source, and their development in various image classification techniques such as edge detection techniques. This study aims to examine changes in the coastline in Banmaleng Village, Gili Raja Island, Sumenep Regency using the Canny edge detection algorithm on multitemporal Landsat 7 and 8 imagery in 2005 - 2020. The edging process includes (a) minimize noise by applying a Gaussian filter, (b) determine the image intensity gradient, (c) apply non-maximum emphasis to eliminate spurious responses to objects, (d) define multiple thresholds for determining potential image edges, (e) Track edge hysteresis by pressing all other weak edges that are not connected to firm edges. Canny edge detection produces sharp edges to analyze coastline changes quite well. Every five years, the coastline of Banmaleng Village experienced shifting from 0,4 to 2,3 meters in several areas.Keywords: Edge Detection, Landsat, Coastline, Canny Algorithm, Gili Raja
Comparison of Admiralty and Least Square Methods for Tidal Analysis in Mandangin Island, Sampang Regency, East Java Luhur Moekti Prayogo
Jurnal Perikanan dan Kelautan Vol 10, No 2 (2020)
Publisher : JURNAL PERIKANAN DAN KELAUTAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/jpk.v10i2.10215

Abstract

The existence of hydro-oceanographic information such as tides plays an essential role in supporting coastal areas' transportation. This study aims to compare the tidal analysis results in Mandangin Island, Sampang Regency, East Java using the Admiralty and Least Square methods. The data used in this study are tidal data for May and November 2020, which represent the dry and rainy seasons in Indonesia. Tide data are obtained from the Geospatial Information Agency (BIG) at one-hour intervals. From this research, it can be concluded that the tidal types generated from the Admiralty and Least Square methods in Mandangin Island, East Java, are mixed types with semidiurnal tendencies. The use of the Admiralty and Least Square methods results in the difference in the harmonic components' amplitude values. The M2 and O1 components have an enormous difference in May 2020, with amplitude values of 0.0003 and 0.0002, and the difference in the amplitude values of the harmonic components also occurred in November 2020. The M2 component has the most significant difference compareto other components, namely 0.0011. The components O1, P1, and MS4 in the same month result in a relatively small difference in amplitude values with values of 0.0002, 0.0002, and 0.0001. For further tidal research, data corrections should be considered, a nodal correction to produce more accurate observational data. This correction can use the T_Tide program with constants obtained from the analysis process.
Study on Technical Differences in Sea Boundary Determination Based on Permendagri No. 1/2006, Permendagri No. 76/2012 and Permendagri No. 141/2017 Luhur Moekti Prayogo; Joko Eddy Sukoco
Jurnal Perikanan dan Kelautan Vol 11, No 2 (2021)
Publisher : JURNAL PERIKANAN DAN KELAUTAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/jpk.v11i2.11392

Abstract

The sea boundary is an authority in managing marine environmental resources that aim to limit each local government's management. The Indonesian government has made various regulations in regulating regional boundaries, including maritime boundaries. This study aims to determine the differences in the determination of sea boundaries that have been regulated in the Permendagri, including Permendagri No. 1 of 2006, Permendagri No. 76 of 2012, and Permendagri No. 141 of 2017. This research is limited to the study of literature articles that regulate the determination of the boundaries of marine areas. Permendagri No.1 of 2006 and Permendagri No. 76 of 2012 explained that the authority over the management of marine resources is managed by the regions. While in Permendagri No. 141 of 2017 explained that the management of marine resources is regulated by law. The study results found that three critical points of change are listed in the Permendagri, including the use of base points, the use of cartometric methods, and the authority of sea management by districts/cities. From this research, it can be concluded that the Regency/City no longer has the authority to manage marine resources. However, the affirmation of the 4-mile sea boundary for the Regency/City is still needed to calculate the profit-sharing for the management of marine resources. Determination of the base point in the affirmation of boundaries no longer uses the lowest low tide but uses the highest tide as stated in Permendagri No. 141 of 2017. The affirmation of maritime boundaries using the cartometric method has begun to be applied to Permendagri No. 76 of 2012 and continued in Permendagri No. 141 of 2017.
Comparison of Normalized Difference Water Index (NDWI) and Sobel Filter Methods in Landsat 8 Imagery for Coastline Extraction Luhur Moekti Prayogo
Jurnal Perikanan dan Kelautan Vol 11, No 1 (2021)
Publisher : JURNAL PERIKANAN DAN KELAUTAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/jpk.v11i1.11004

Abstract

For a country, the existence of a coastline has an important value because it acts as a protection for marine resources and determines maritime boundaries between countries. There are various methods used for coastline analysis, both manual by digitizing and automatic by edge detection. This study compares the Normalized Difference Water Index (NDWI) method with the Sobel filter for coastline extraction in the South Coast of Sampang, Madura using Landsat 8 imagery. The best approach is then applied to the image to determine changes in coastlines from 2015 to 2020. This research shows that visually, the NDWI method produces better edges than the Sobel filter because the resulting lines are close to the original conditions in Landsat 8 or Basemap World Imagery. Sobel filter, the resulting accuracy is not very good. It does not approach field conditions, but this filter has the advantage of a relatively fast processing time because it can use a single band. Then the NDWI value generated in this study has a range of -0.497121 to 0.377046. The first class, which is a non-water body object, has a value of -0.497121 to 0. Then the second class, which is a body of water object, has a value of 0 to 0.377046. The coastline change for five years shows a shift in the coastline with a range of 0.62 to 2.75 meters. The Landsat 8 pixel size is 30 meters, while the shift is only <3 meters. So that this experiment does not show any significant coastline changes. Suggestions for further research: It is necessary to conduct a study using high-resolution imagery to confirm changes in the coastline accurately.
Study of Tidal Characteristics in The South and North Coastal of Sumenep Regency, Madura Luhur Moekti Prayogo; Leni Suspidayanti
Jurnal Perikanan dan Kelautan Vol 10, No 2 (2020)
Publisher : JURNAL PERIKANAN DAN KELAUTAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/jpk.v10i2.9385

Abstract

Sumenep is one of Madura's regency, which has many islands with a wealth and diversity of natural resources, especially in its marine and coastal areas. With many islands owned, sea transportation in Sumenep is of great importance in the regency. One of the crucial aspects that must be considered related to this transportation is tidal information. This study aims to determine the tidal characteristics in the South and North Coast of Sumenep Regency using the Least Square method. The tide data used in February and September 2020 were obtained from the Geospatial Information Agency (BIG) with an observation interval of one hour. This time was chosen because it represents monsoons' occurrence in Indonesia in the annual season, namely the dry and rainy seasons. The results of this study indicate that the southern coastal area (Giligenting District) has a mixed tidal type, tends to be semi-diurnal with Formzahl numbers of 0.86 and 1.29 (0.25 <F £ 1.5). In comparison, the North coast (Dasuk District) has a Diurnal tidal type with Formzahl numbers of 3.64 and 4.30 (F > 3.0). The different tides are due to the sampling's location representing different geographical conditions, namely open waters (North Coast) and closed waters (Pesisir Selatan). The elevation parameters obtained still need supporting data such as waves, currents, and bathymetry used by policymakers for safety in using sea transportation. 
Mangrove Vegetation Mapping Using Sentinel-2A Imagery Based on Google Earth Engine Cloud Computing Platform Luhur Moekti Prayogo
International Journal of Science, Engineering, and Information Technology Vol 6, No 1 (2021): IJSEIT Volume. 06 Issue. 01 DECEMBER 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/ijseit.v6i1.12175

Abstract

Mangroves are trees whose habitat is affected by tides, and their presence has decreased from year to year. Today, mapping technology has undergone many developments, including the availability of images of various resolutions and cloud-based image processing. One of the popular platforms today is the Google Earth Engine. Google Earth Engine is a cloud-based platform that makes it easy to access high-performance computing resources for extensive processing. The advantage of using Google Earth Engine is that users do not have to be IT experts without experts in application development, WEB programming, and HTML. This study aims to conduct a study on mangrove mapping in Gili Genting District with Sentinel-2A imagery using a Google Earth Engine. This location was chosen since there are still many mangroves, especially on the Gili Raja and Gili Genting Islands. From this research, it can be concluded that cloud computing-based Sentinel-2A image processing shows that the vegetation value of NDVI results ranges from -0.923208 to 0.75579. The classification results show that mangrove forests' overall presence on Gili Genting Island is more expansive than Gili Raja Island with 16.74 ha and 14.75 ha. The use of the Google Earth Engine platform simplifies the analysis process because image processing can be done once with various scripts so that analysis becomes faster.
SIMULASI PENENTUAN PERMUKAAN AIR LAUT TERENDAH PADA PERENCANAAN PELABUHAN MENGGUNAKAN SOFTWARE T_TIDE Yahya Dwikarsa; Luhur Moekti Prayogo
Juvenil Vol 2, No 3 (2021)
Publisher : Department of Marine and Fisheries, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/juvenil.v2i3.10972

Abstract

ABSTRAKKemajuan wilayah pesisir tentu tidak lepas dari sarana dan prasarana yang mendukung salah satunya adalah pelabuhan. Kolam pelabuhan merupakan salah satu aspek yang penting dalam pembangunan pelabuhan karena ketika kapal melakukan pelayaran, kolam pelabuhan dibutuhkan sebagai tempat bersandar kapal (berth time) agar tidak terganggu oleh gelombang. Penentuan kolam pelabuhan membutuhkan berbagai data salah satunya adalah pasang surut air laut. Penelitian ini bertujuan untuk penentuan nilai LAT dan perhitungan nilai draft kapal yang dapat berlabuh di wilayah di kabupaten Cilacap, Jawa Tengah jika akan dibuat pelabuhan. Dari penelitian ini dapat diketahui bahwa nilai LAT wilayah penelitian sebesar -1.132 m. Dengan kapal sebesar 20.000 DWT serta memiliki draft 9,2 m pada kedalaman 14 m, ruang bebas gerak kapal, faktor H dan jarak aman memiliki nilai secara sebesar 3.1, 10.9 dan 1.7 m. Pada kedalaman 25 m, ruang bebas gerak kapal, H dan jarak aman memiliki nilai secara sebesar 14.1, 10.9 dan 1.7 m. Sedangkan pada kedalaman 50 meter, ruang bebas gerak kapal, H dan jarak aman memiliki nilai secara sebesar 39.1, 10.9 dan 1.7 m. Kata kunci: Pasang Surut, Lowest Astronomical Tide, Kolam Pelabuhan, T_Tide, CilacapABSTRACTThe development of coastal areas cannot be separated from the supporting facilities and infrastructure, one of which is the port. The harbor pool is one of the essential aspects of port development because when the ship is sailing, the port pool is needed as a berth time for the ship not to be disturbed by waves. Determining the port pool requires various data, one of which is the tides. This study aims to determine the LAT value and calculate the draft value of ships that can dock in the Cilacap Regency, Central Java if a port is to be built. From this research, it can be seen that the LAT value of the research area is -1.132 m. With a ship of 20,000 DWT and having a draft of 9.2 m at a depth of 14 m, the ship's free space, H factor, and safe distance have values of 3.1, 10.9, and 1.7 m. At a depth of 25 m, the ship's free space, H, and safe distance have values of 14.1, 10.9, and 1.7 m. Meanwhile, at a depth of 50 meters, the ship's free space, H, and safe distance have 39.1, 10.9, and 1.7 m.Keyword: Tide, Lowest Astronomical Tide, Harbor Pool, T_Tide, Cilacap
Co-Authors -, Linayati - A. Syahrul Mushofa Abdul Basith ABDUL BASITH Achmad Sudianto Ahmad Mualim Ahyuni Ahyuni Al Shida Natul Amir Yarkhasy Yuliardi Bimo Aji Widyantoro Dewi Purwanti, Dewi Faruq Faruq Feni Nurkumala Firdaus, Randi Firman Farid Muhsoni Hendra Saputra Irvan Aris Kurniawan Joko Eddy Sukoco Jumiati Jumiati Jumiati Laili Ainur Rosida Leni Suspidayanti Linayati, Linayati Mahardhika Nur Permatasari Marita Ika Joesidawati Mifta Irmayunita Miftachul Munir Moh. Syaeful Anwar Mohammad Bahrus Syakirin Muhamad Rifqi Muhammad Hanif Muhammad Hanif Muhammad Hanif Muhammad Tezar Napitupulu, Gandhi Nasrulllah Hanif Maulana Nova Widiantoro Nugroho, Agung Tri Nurdin Nurdin Oktria Muhammad Sholeh Rachman, Herlambang Aulia Rahmalia, Diah Ayu Raka Nur Sukma Rizki Atthoriq Hidayat Sari, Ratna Juita Sarono Sarono Septy Heltria Spanton, Perdana Ixbal Sudianto, Achmad Sugeng Hartono Sumaryo Sumaryo Suwarsih Tri Yusufi Mardiana Tristiana Yuniarti Wawan Diyanto Yahya Dwikarsa Yuyun Suprapti Zainul Hidayah Zaki Mubarok