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APLIKASI TEKNOLOGI EKSPLORASI UNTUK MEMAHAMI KONDISI AIR TANAH DI DAERAH PADANG LUAS KABUPATEN TANAH LAUT Prayogo, Teguh
Jurnal Air Indonesia Vol 5, No 2 (2009): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jai.v5i2.2448

Abstract

Groundwater is water that comes from the ground. Groundwater comes from rain, snow, sleet, and hail that soaks into the ground. The water moves down into the ground because of gravity, passing between particles of soil, sand, gravel, or rock until it reaches a depth where the ground is filled, or saturated, with water. Groundwater is stored in the ground in materials like gravel or sand. Water can also move through rock formations like sandstone or through cracks in rocks. Groundwater is one of solution to overcome a problem of the need of drinking water in the PadangLuas Area, because the availability of surface water is not enough. The objective of research is finding out characteristic and condition of ground water in PadangLuas, Tanah Laut district. To meet the objective, it was applied method of geophysical technology, namely electrical resistivity method by injecting current into the ground through current electrodes that are grounded at the earth's surface and measuring the difference of the electrical potential between the potential electrodes. Based on data processing, modeling and interpretation, it was gained result concerning the existence of aquifer in PadangLuas area that is predicted to occupy between 30 ? 60 meter and 70 ? 120 meter depth. Keywords : Groundwater, Electrical Resistivity
STUDY ON OCEANGRAFHIC AND WEATHER CONDITIONS RELATED TO THE ABUNDANCE OF SMALL PELAGIC FISHERY IN NATUNA SEA USING REMOTE SENSING DATA Prayogo, Teguh; Arthana, I Wayan
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 4 No 1
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

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Abstract

Indonesian waters have abundance of natural resources; the potential of small pelagic fish in Natuna Sea and SouthChina Sea have not been optimized yet explores. Unfortunately, it was caused by lacking in the data of environmentalconditions that have been changed and the information of appropriate fishing ground. Hence, dynamical oceanographicinformation and weather condition is necessary to optimize small pelagic fish exploitation.Research location in Natuna Sea and its surrounding with geographical position is 08°N?03°S; 103°?111°E. Theoceanographic condition representative by monthly SST, Chl-a, SSH that derived from satellite data and Dipole ModeIndex for 2002-2007 from FRCGC website. Monthly wind data is variable for weather condition. Small pelagic fishabundance representative by annual fish production (2002-2005) and monthly Catch Per Unit Effort (CPUE) ofGoldstripe sardinella, Bigeye scad and Indian scad (2006). It was data collected from Directorate General of CaptureFisheries (Ministry of Marine Affairs and Fisheries) and daily fishing operation (2007) used to calculate match-up ratiothat was collected from Pemangkat fishing port in West Kalimantan. Research process consists of image processing,descriptive correlation analysis and GIS analysis to predict fishing ground map and match-up ratio calculation.Result of this research is the annual fish catch production of Bigeye scad and Indian scad (2002-2005) is tend toincrease and the monthly CPUE of both species is high during SE Monsoon (May-Sep) that is condition contrarily in NWMonsoon (Nov-Apr). Meanwhile, the annual fish catch production of Goldstripe sardinella production is tend to decreasefrom 2002-2005, it has CPUE is high in early SE Monsoon (May). During the SE Monsoon (May-Sep) when DM Index ispositive (+) the Indian scad and Bigeye scad production is high, for Goldstripe sardinella the fish production is highwhen DM Index is positive (+) in May. The accuracy of prediction map of small pelagic fishing ground in Natuna Sea isabout 0.61, 0.76 and 0.81 for Goldstripe sardinella, Indian scad and Bigeye scad, respectively.
AKUISISI DATA SUMBERDAYA AIR TANAH DI DAERAH SUKODONO KABUPATEN PACITAN Prayogo, Teguh
Jurnal Air Indonesia Vol 5, No 1 (2009): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jai.v5i1.2429

Abstract

The need of water for human life is very high, especially to meet a demand of water supply, such as for drinking water, washing, taking a bath, and etc. Unfortunately, the availability of surface water at an area is sometimes not enough to comply with a request of pure water, as happened in the Sukodono area. Hence, to avoid the problem, we focus at the ground water sources as alternative water supply. In this paper will be discussed exploration of ground water that is accomplished with imaging resistivity technology to find out characteristic and condition of ground water in Sukodono, Pacitan district, EastJavaProvince. Based on the result of survey in field and interpretation, the existence of aquifer in Sukodono area is occupied between 5 ? 40 meter depth. Key words : ground water, imaging resistivity, desa Sukodono
PENGEMBANGAN MODEL EKSTRAKSI SUHU PERMUKAAN LAUT MENGGUNAKAN DATA SATELIT LANDSAT 8 STUDI KASUS: TELUK LAMPUNG (DEVELOPMENT MODEL OF SEA SURFACE TEMPERATURE EXTRACTION USING LANDSAT- 8 SATELLITE DATA, CASE STUDY: LAMPUNG BAY) Arief, Muchlisin; Adawiah, Syifa W.; Parwati, Ety; Hamzah, Rossi; Prayogo, Teguh
Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital Vol. 12 No. 2 Desember 2015
Publisher : Indonesian National Institute of Aeronautics and Space (LAPAN)

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Abstract

Teluk Lampung merupakan daerah yang banyak memiliki keramba ikan kerapu, yang mana kualitas dan kuantitas airnya menjadi perhatian utama. Kualitas air ditentukan oleh faktor biologi, kimia, dan fisika. Salah satu parameter fisik adalah temperatur/suhu air. Banyak metode penentuan Suhu Permukaan Laut (SPL) menggunakan data satelit resolusi spasial menengah yang diturunkan dari satu band infra merah. Originality dari penelitian ini menggunakan fungsi yang diperoleh dari hasil korelasi antara temperatur pengamatan dengan temperatur kecerahan dari dua band infra merah. Tujuan penelitian ini adalah untuk mengembangkan pemodelan algoritma baru guna mengestimasi SPL menggunakan band 10 dan band 11 dari data satelit Landsat-8. Algoritma model ekstraksi SPL diperoleh melalui 3 tahapan, yaitu: Pertama melakukan koreksi geometrik dan mengkonversi nilai digital number ke nilai radiansi. Kedua adalah menghitung nilai temperatur kecerahan serta mengamati inteval temperaturnya. Kemudian mengkorelasikan temperatur pengukuran dengan temperatur kecerahan dari band 10 dan band 11, maka diperoleh persamaan polinomial orde 3 dalam 2 dimensi. Ketiga mengkorelasikan temperatur pengamatan in situ dengan temperatur kecerahan dari band 10 dan band 11 secara bersamaan (dalam 3 dimensi). maka diperoleh persamaan fungsi korelasi polinomial orde 3 dalam 3 dimensi. Fungsi untuk estimasi SPL adalah: T(X10,X11).= ?anXn10+bnXn11, yang mana koefisien/konstanta dari setiap orde ditentukan dari perkalian antara hasil perbandingan interval temperatur kecerahan (band 10 dan band 11) dengan konstanta setiap orde dari persamaan polinomial dalam 2 dimensi. Berdasarkan perbandingan antara temperatur hasil perhitungan dengan temperatur pengamatan, model estimasi SPL ini mempunyai kesalahan (RMSE) sebesar 21,15 % atau mempunyai ketelitian/akurasi sebesar 78,85 %.Kata-kunci: Algoritma, Landsat-8, Ekstraksi, Radiansi, Kecerahan temperatur, Polinomial, Suhu permukaan laut, Teluk Betung
METODE PENENTUAN TITIK KOORDINAT ZONA POTENSI PENANGKAPAN IKAN PELAGIS BERDASARKAN HASIL DETEKSI TERMAL FRONT SUHU PERMUKAAN LAUT Hamzah, Rossi; Marpaung, Sartono; Prayogo, Teguh
Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital Vol. 13 No. 2 Desember 2016
Publisher : Indonesian National Institute of Aeronautics and Space (LAPAN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.pjpdcd.2016.v13.a2364

Abstract

Information points coordinate of potential fishing zones (PFZ) is required by user that to be more effective in conducting fishing operation. The results of thermal front detection using single image edge detection (SIED) asshape contour lines. This research aims to determine points coordinate for potential fishing zone based on detection of thermal fronts sea surface temperatures.To determine point coordinate performed segmentation on detection result according to size fishnet grid. Contour line contained in each grid is a polygon shape.Centroid of each polygon is point coordinate of PFZ. The result of sea surface temperature data processing from Terra/Aqua MODIS and Suomi NPP VIIRS satellitesindicates that method of determination the centroid of polygon is very effective in determining the point coordinate of PFZ. Using that method the processing stages of satellite data to be faster, more efficient and practical due to the information of PFZ is already as points coordinate.Abstrak Informasi titik koordinat zona potensi penangkapan ikan (ZPPI) sangat diperlukan oleh pengguna agar lebih efektif dalam melakukan operasi penangkapan ikan. Hasil deteksi termal front menggunakan metode Single Image Edge Detection (SIED) dalam bentuk garis kontur. Penelitian ini bertujuan untuk menentukan titik koordinat ZPPI berdasarkan hasil deteksi termal front suhu permukaan laut. Untuk menentukan titik koordinat dilakukan segmentasi hasil deteksi sesuai ukuran fishnet grid. Garis kontur yang terdapat dalam setiap grid merupakan bentuk poligon. Pusat geometri dari setiap poligon merupakan titik koordinat ZPPI. Hasil pengolahan data suhu permukaan laut dari satelit Terra/Aqua MODIS dan Suomi NPP VIIRS menunjukkan bahwa metode penentuan pusat geometri poligon sangat efektif dalam menentukan titik koordinat ZPPI. Dengan menggunakan metode tersebut tahap pengolahan data satelit menjadi lebih cepat, efisien dan lebih praktis karena informasi ZPPI sudah dalam bentuk titik koordinat.
KAJIAN PERUBAHAN GARIS PANTAI MENGGUNAKAN DATA SATELIT LANDSAT DI KABUPATEN KENDAL Arief, Muchlisin; Winarso, Gathot; Prayogo, Teguh
Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital Vol 8 (2011)
Publisher : Indonesian National Institute of Aeronautics and Space (LAPAN)

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Abstract

Indonesia has the second longest of coastal line in the world. The change of coastal line is generated by sediment transport from the upland and the sea or generated by coming energies of sea current and wave. Coastal line change have been analyzed by multi-temporal analysis using Landsat Series Satellite (MSS, TM and ETM+). Visual interpretation of RGB 542 was done to identify coastal line, and using other combination if necessary. Based on analysis of Landsat data the coastal lines length on 1972, 1991, 2001 and years 2008 was 43.172 m, 52.646 m, 50.171 m, 53.827 m, respectively, and the change of coastal lines occurred dominant along the capes and the bays and the other places was not significantly changed. Based on Landsat satellite data analysis, in 1972 to 1991 period the abrasion and accretion occurred on 765,14 ha and 356,00 ha area, in 1991 to 2001 period were 90,64 ha and 261,89 ha, in period 2001 to 2008 were 111,67 ha and 80,37 ha. Keys word: Landsat, Coastal line change, Erosion, Sedimentation, Abrasion and Accretion 
PENGEMBANGAN METODE PENDUGAAN KEDALAMAN PERAIRAN DANGKAL MENGGUNAKAN DATA SATELIT SPOT-4 STUDI KASUS: TELUK RATAI, KABUPATEN PESAWARAN (METHODE DEVELOPMENT FOR SHALLOW WATER DEPTH BATHYMETRIC ESTIMATION USING SPOT-4 SATELLITE DATA, A CASE STUDY: RATAI BAY, PESAWARAN DISTRICT) Arief, Muchlisin; Hastuti, Maryani; Asriningrum, Wikanti; Parwati, Ety; Budiman, Syarif; Prayogo, Teguh; Hamzah, Rossi
Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital Vol. 10 No. 1 Juni 2013
Publisher : Indonesian National Institute of Aeronautics and Space (LAPAN)

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Abstract

Pendugaan batimetri perairan dangkal menggunakan data satelit penginderaan jauh semakin umum dilakukan. Namun, ketika metode tersebut diimplementasikan untuk wilayah dengan lingkungan yang berbeda, maka hasilnya menunjukkan adanya penyimpangan. Untuk meminimalkan penyimpangan tersebut, maka dilakukan penggabungan informasi diperoleh dari pengukuran lapangan dengan nilai reflektansi citra satelit SPOT-4. Pada makalah ini diusulkan pengembangan metode pendugaan kedalaman perairan didasarkan pada fungsi korelasi antara nilai kedalaman dari hasil pengukuran langsung menggunakan alat “handheld echo-sounder” dengan penjumlahan resultante nilai reflektansi (band1 dan band3). Algorithma pendugaan batimetri di perairan dangkal di Teluk Ratai terdiri dari metode thresholding dan fungsi korelasi. Nilai threshold (T) untuk kedalaman 0.5 meter ditentukan dari pengamatan grafik fungsi korelasi polynomial ordre lima dan besarnya adalah 0.35
CHLOROPHYLL-A CONCENTRATIONS ESTIMATION FROM AQUA-MODIS AND VIIRS-NPP SATELLITE SENSORS IN SOUTH JAVA SEA WATERS Nuris, Rayhan; Gaol, Jonson Lumban; Prayogo, Teguh
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 12, No 1 (2015)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.ijreses.2015.v12.a2673

Abstract

This study aimed to estimate the concentration of chlorophyll-a from satellite imagery of National Polar-Orbiting Operational Environmental Satellite System (NPOESS) Preparatory Project (NPP) in the south Java Sea waters and compare it to the concentrations of chlorophyll-a estimation result from the MODIS-Aqua satellite. NPP satellite had Visible/Infrared Imager Radiometer Suite (VIIRS) sensors which performance was same as Moderate Resolution Imaging Spectroradiometer (MODIS) sensor with a better spatial resolution. This study used daily satellite imagery of VIIRS-NPP for the period of September 2012 to August 2013. The algorithm that was used to estimate the concentration of chlorophyll-a was Ocean Color 3-band ratio (OC-3). The results showed that the spatial distribution pattern of chlorophyll-a concentration between VIIRS - NPP sensor and MODIS had the same pattern, but the estimation of chlorophyll-a concentration from the MODIS sensor was higher than VIIRS -NPP sensor. The concentration of chlorophyll-a showed that there were spatial and temporal variation in the south Java Sea waters. Generally, concentrations of chlorophyll-a was higher in East monsoon than West monsoon.
IDENTIFIKASI GOSONG KARANG MENGGGUNAKAN CITRA SATELIT SENTINEL 2A (STUDI KASUS: PERAIRAN PESISIR NIAS UTARA) Purwanto, Anang Dwi; Prayogo, Teguh; Marpaung, Sartono
Jurnal Teknologi Lingkungan Vol 21, No 1 (2020)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jtl.v21i1.3769

Abstract

ABSTRACTThe waters of Northern Nias, North Sumatra Province have a great potential for natural resources, one of which is the reef which is often used as a fishing ground. This study aims to identify and monitor the distribution of coral reefs around the waters of Northern Nias. The location of study is limited by coordinates 97° 0'31'' - 97° 16'54'' E and 1° 29'2'' LU - 1° 6'24'' N. The study locations were grouped in 6 (six) areas including Mardika reef, Wunga reef, Mausi1 reef, Mausi2 reef, Tureloto reef and Senau reef. The data used were Sentinel 2A imagery acquisition on 19 September 2018 and field observations made on 6-12 September 2018. Data processing includes geometric correction, radiometric correction, water column correction and classification using pixel-based and object-based methods as well as by delineating on the image. One classification method will be chosen that is most suitable for the location of the reef. The results show Sentinel 2A was very helpful in mapping the distribution of coral reefs compared to direct observation in the field. The use of image classification method rightly is very helpful in distinguishing coral reef objects from surrounding objects. The estimated area of coral reefs was 1,793.20 ha with details of the Mardika reef 143.27 ha, Wunga reef 627.06 ha, Mausi1 reef 299.84 ha, Mausi2 reef 141.873 ha, Tureloto reef 244.73 ha, Senau reef 336.44 ha. The existence of coral reefs have a high potential as a fishing ground and a natural tourist attraction.Keywords: coral reefs, sentinel 2A, lyzenga 1978, image classification, Northern NiasABSTRAKPerairan Nias Utara yang terletak di Provinsi Sumatra Utara memiliki potensi kekayaan alam yang besar dimana salah satunya adalah gosong karang yang sering dijadikan lokasi penangkapan ikan oleh nelayan. Penelitian ini bertujuan untuk mengidentifikasi dan monitoring sebaran gosong karang di sekitar perairan Nias Utara. Lokasi penelitian dibatasi dengan koordinat 97°0?31?? - 97°16?54?? BT dan 1°29?2??LU ? 1°6?24??  LU. Untuk mempermudah dalam pengolahan data maka lokasi kajian dikelompokkan dalam 6 (enam) kawasan diantaranya gosong Mardika, gosong Wunga, gosong Mausi1, gosong Mausi2, gosong Tureloto dan gosong Senau. Data yang digunakan adalah citra satelit Sentinel 2A hasil perekaman tanggal 19 September 2018 dan hasil pengamatan lapangan yang telah dilakukan pada tanggal 6 - 12 September 2018. Pengolahan data meliputi koreksi geometrik, koreksi radiometrik, koreksi kolom air dan klasifikasi menggunakan metode klasifikasi berbasis piksel dan berbasis objek serta deliniasi citra. Dari ketiga metode klasifikasi tersebut akan dipilih satu metode klasifikasi yang sesuai dengan lokasi gosong karang. Hasil penelitian menunjukkan citra Sentinel 2A sangat membantu dalam memetakan sebaran gosong karang dibandingkan dengan pengamatan langsung di lapangan. Pemilihan metode klasifikasi citra satelit yang tepat sangat membantu dalam membedakan objek gosong karang dengan objek di sekitarnya. Estimasi total luasan gosong karang di perairan Nias Utara adalah 1,793.20 ha dengan rincian luasan gosong karang Mardika 143.27 ha, gosong Wunga 627.06 ha, gosong Mausi1 299.84 ha, gosong Mausi2 141.873 ha, gosong Tureloto 244.73 ha, gosong Senau 336.44 ha. Keberadaan gosong karang memiliki potensi yang tinggi sebagai lokasi penangkapan ikan dan memiliki daya tarik sebagai tempat wisata alam.Kata kunci: gosong karang, sentinel 2A, lyzenga 1978, klasifikasi citra, Nias Utara
INTERPOLATION METHODS FOR SEA SURFACE HEIGHT MAPPING FROM ALTIMETRY SATELLITES IN INDONESIAN SEAS Hamzah, Rossi; Prayogo, Teguh
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 11, No 1 (2014)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.ijreses.2014.v11.a2599

Abstract

Altimetry satellite data, has a very low spatial resolution for using in determine fishing ground area. With very low spatial resolution is required interpolation method that can mapped Sea Surface Height (SSH) with a good result. SSH data from Global Near Real Time from AVISO, mapped in geographic projection and interpolated with Inverse Distance Weighting (IDW) and Ordinary Krigging method. This interpolation method are expected to know which the good method for mapped SSH data in resulting better information. The results of statistical calculation shows that RMSE value and standar deviations from kriging method is smaller than IDW method.