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All Journal Jurnal Teknosains Journal of Applied Geospatial Information MAJALAH ILMIAH GLOBE International Journal of Remote Sensing and Earth Sciences (IJReSES) Aquacultura Indonesiana Jurnal Pengabdian dan Pengembangan Masyarakat JURNAL GEOGRAFIKA (GEOGRAFI LINGKUNGAN LAHAN BASAH)
Widyatmanti, Wirastuti
Department Of Geographic Information Science, Faculty Of Geography, Universitas Gadjah Mada
Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Mechanical Engineering Physics

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APLIKASI CITRA LANDSAT 8 OLI UNTUK IDENTIFIKASI STATUS TROFIK WADUK GAJAH MUNGKUR WONOGIRI, JAWA TENGAH Laksitaningrum, Kusuma Wardani; Widyatmanti, Wirastuti
MAJALAH ILMIAH GLOBE Vol 19, No 2 (2017)
Publisher : Badan Informasi Geospasial

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1424.37 KB) | DOI: 10.24895/MIG.2017.19-2.633

Abstract

ABSTRAKWaduk Gajah Mungkur (WGM) adalah bendungan buatan yang memiliki luas genangan maksimum 8800 ha, terletak di Desa Pokoh Kidul, Kecamatan Wonogiri, Kabupaten Wonogiri. Kondisi perairan WGM dipengaruhi oleh faktor klimatologis, fisik, dan aktivitas manusia yang dapat menyumbang nutrisi sehingga mempengaruhi status trofiknya. Tujuan dari penelitian ini adalah mengkaji kemampuan citra Landsat 8 OLI untuk memperoleh parameter-parameter yang digunakan untuk menilai status trofik, menentukan dan memetakan status trofik yang diperoleh dari citra Landsat 8 OLI, dan mengevaluasi hasil pemetaan dan manfaat citra penginderaan jauh untuk identifikasi status trofik WGM. Identifikasi status trofik dilakukan berdasarkan metode Trophic State Index (TSI) Carlson (1997) menggunakan tiga parameter yaitu kejernihan air, total fosfor, dan klorofil-a. Model yang diperoleh berdasar pada rumus empiris dari hasil uji regresi antara pengukuran di lapangan dan nilai piksel di citra Landsat 8 OLI. Model dipilih berdasarkan nilai koefisien determinasi (R2) tertinggi. Hasil penelitian merepresentasikan bahwa nilai R2 kejernihan air sebesar 0,813, total fosfor sebesar 0,268, dan klorofil-a sebesar 0,584. Apabila nilai R2 mendekati 1, maka semakin baik model regresi dapat menjelaskan suatu parameter status trofik. Berdasarkan hasil kalkulasi diperoleh distribusi yang terdiri dari kelas eutrofik ringan, eutrofik sedang, dan eutrofik berat yaitu pada rentang nilai indeks 50,051 – 80,180. Distribusi terbesar adalah eutrofik sedang. Hal tersebut menunjukkan tingkat kesuburan perairan yang tinggi dan dapat membahayakan makhluk hidup lain.Kata kunci: Waduk Gajah Mungkur, citra Landsat 8 OLI, regresi, TSI, status trofikABSTRACTGajah Mungkur Reservoir is an artificial dam that has a maximum inundated areas of 8800 ha, located in Pokoh Kidul Village, Wonogiri Regency. The reservoir’s water conditions are affected by climatological and physical factors, as well as human activities that can contribute to nutrients that affect its trophic state. This study aimed to assess the Landsat 8 OLI capabilities to obtain parameters that are used to determine its trophic state, identifying and mapping the trophic state based on parameters derived from Landsat 8 OLI, and evaluating the results of the mapping and the benefits of remote sensing imagery for identification of its trophic state. Identification of trophic state is based on Trophic State Index (TSI) Carlson (1997), which uses three parameters there are water clarity, total phosphorus, and chlorophyll-a. The model is based on an empirical formula of regression between measurements in the field and the pixel values in Landsat 8 OLI. Model is selected on the highest value towards coefficient of determination (R2). The results represented that R2 of water clarity is 0.813, total phosphorus is 0.268, and chlorophyll-a is 0.584. If R2 close to 1, regression model will describe the parameters of the trophic state better. Based on the calculation the distribution consists of mild eutrophic, moderate eutrophic, and heavy eutrophic that has index values from 50.051 to 80.18. The most distribution is moderate eutrophication, and it showed the high level of trophic state and may harm other living beings.Keywords: Gajah Mungkur Reservoir, Landsat 8 OLI satellite imagery, regression, TSI, trophic state
Water Quality Assessment Using Remote Sensing and GIS for In-shore Marine Environment Suitability Ruslisan, Ruslisan; Kalam, Nur H; Dwininta, Aglis C; Habibi, Muhammad H; Rahayu, Ernawati T; Dewi, Nur khovia; Henny K, Eleonora E; Widyatmanti, Wirastuti
Aquacultura Indonesiana Vol 17, No 2 (2016)
Publisher : Indonesian Aquaculture Society (MAI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (528.527 KB) | DOI: 10.21534/ai.v17i2.62

Abstract

In-shore marine environment and its adjoining estuary has a potential susceptibility to water pollution due to the continuous discharge of its unhealthy catchment. Seawater quality studies commonly require a very detailed water sampling and analysis, leading to high expenditures on time and energy. This study aims to examine the water quality of the Dodokan Estuary using remote sensing and geographic information system (GIS) approaches, and to determine the most appropriate water environment mapping unit for marine environment suitability studies. Landsat 8 and QuickBird® were used to extract water quality parameters using related spectral transformations. Field surveys were conducted concurrently to the Landsat 8 acquisition time on the study area, to collect water samples for laboratory analysis including sea surface temperature (SST), chlorophyll-a, Dissolved Oxygen (DO), and Total Suspended Solid (TSS). Mapping units were generated based on visual interpretation on QuickBird® for estuarine plumes, to identify the possible distribution of suspended material from its catchment. The statistical analyses present that the parameter extracted from the satellite imagery and from laboratory analysis produces R values of 0.7 in average, despite its low value on chlorophyll-a. By utilizing assorted sea-water marine suitability criteria, it can be concluded that the inshore marine environment in the Dodokan Estuary and its surrounding area are suitable for various biota conservation e.g. coral, sea-grass, and mangrove, and in contrast, marine aquaculture. The knowledgeable uses of remote sensing and GIS also assist the sea-water qualities assessment mapping in term of providing boarder understanding of a water environment condition to effectively minimize the cost of sampling.
Marine Environmental Suitability Mapping for Lobster Sea-cage Culture in East Lombok Using Remote Sensing Data and GIS Approaches Sarah N.F., Zealandia; Rivani, Anggia; Puspitasari, Bety; Ikhwansyah, Firdian; Maulidyah, Fonna; D, Ridho Dwi; P, Sufiyana Eka; Widyatmanti, Wirastuti
Aquacultura Indonesiana Vol 17, No 2 (2016)
Publisher : Indonesian Aquaculture Society (MAI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1046.471 KB) | DOI: 10.21534/ai.v17i2.60

Abstract

Lobster, one of the high values sea-cage culture commodities in Indonesia,  has some specific requirements of life environment. However, there haven’t been any studies that specifically identify these potential sites. Until today it is only 3.50 ha out of 526.86 Ha of these that have been utilized.  This study aims to map the marine suitability environment for lobster cultivation in Ekas Bay, using remote sensing and GIS approaches. The requirement parameters maps for lobster marine suitability, includes oxygen levels (DO), nutrition, salinity, temperature, depthness, pH, and water clearence which are able to be extracted from Landsat 8 imagery. Using GIS, a model was developed to integrate those maps with marine environment secondary maps, water laboratory analysis, and other information from interview result with the local farmer’s. The result shows that lobsters live in the environment which has the temperature between 200 to 250C and at the water depth of reaching 100 m. Laboratory analysis result presents the pH value of above 7 in average, DO ranges from 5-8 ppm, and salinity level from 28 to 35 ppt. In summary, the integration of remote sensing and GIS approaches are able to identify the common parameter that support the environment suitability for lobsters which is then formulated as a standard of marine environment suitability mapping. 
APLIKASI WEB MAP DALAM PEMETAAN KESESUAIAN FISIK PERAIRAN UNTUK BUDIDAYA KERAMBA JARING APUNG DI TELUK LAMPUNG Estigade, Andiyanti Putri; Astuti, Ariani Puji; Wicaksono, Arief; Maitela, Tika; Widyatmanti, Wirastuti
MAJALAH ILMIAH GLOBE Vol 21, No 1 (2019)
Publisher : Badan Informasi Geospasial

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (230.912 KB) | DOI: 10.24895/MIG.2019.21-1.867

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Budidaya keramba jaring apung di Provinsi Lampung menjadi salah satu pengembangan budidaya perikanan laut yang potensial dalam meningkatkan produksi pangan. Akan tetapi, penelitian mengenai kesesuaian fisik perairan untuk budidaya perikanan pada wilayah tersebut belum banyak dilakukan karena wilayahnya yang luas dan juga mahalnya biaya analisis kualitas air. Penelitian ini bertujuan untuk melakukan analisis spasial untuk menentukan lokasi potensial budidaya keramba jaring apung menggunakan citra Landsat 8 OLI dan SIG; dan menyajikan peta kesesuaian fisik perairan untuk budidaya keramba jaring apung ke dalam Web Map. Lokasi penelitian berada di sebagian Teluk Lampung. Parameter biofisik yang dipertimbangkan untuk kesesuaian keramba jaring apung antara lain kecerahan, suhu, salinitas, pH, kedalaman, material padatan tersuspensi, dan klorofil-α. Pengambilan sampel biofisik di lapangan menggunakan metode sistematis. Model akhir diperoleh dari hasil pembobotan kuantitatif berjenjang tertimbang. Setelah dihasilkan model kesesuaian fisik perairan, selanjutnya peta akhir dan semua data parameter dimasukkan ke dalam ArcGIS Online untuk disajikan ke dalam Web Map. Dengan memanfaatkan fasilitas yang disediakan oleh ArcGIS Online maka informasi mengenai kesesuaian fisik perairan untuk budidaya keramba jaring apung di Teluk Lampung diharapkan dapat tersebar luas dan dimanfaatkan secara umum, khususnya bagi pemerintah, swasta, dan masyarakat yang bekerja dalam bidang perikanan budidaya. Hasil penelitian ini mampu menunjukkan bahwa integrasi antara data penginderaan jauh, sistem informasi geografis, dan teknologi informasi geospasial dapat dimanfaatkan untuk mendukung tercapainya tujuan nomor 14 dari agenda pembangunan keberlanjutan di Indonesia.
ANALISIS PENGARUH SUHU PERMUKAAN LAHAN TERHADAP ELEMEN IKLIM MIKRO DI SURAKARTA MENGGUNAKAN CITRA PENGINDERAAN JAUH MULTITEMPORAL Zahrotunisa, Siti; Jatmiko, Retnadi Heru; Widyatmanti, Wirastuti
MAJALAH ILMIAH GLOBE Vol 22, No 1 (2020)
Publisher : Badan Informasi Geospasial

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24895/MIG.2020.22-1.952

Abstract

Perubahan penutup lahan seperti ekspansi lahan terbangun berpotensi untuk mengalami peningkatan suhu permukaan lahan dan perubahan elemen iklim mikro yang menyebabkan penurunan kenyamanan. Penelitian ini bertujuan untuk mengetahui kemampuan data penginderaan jauh untuk memperoleh paramater penutup lahan dan suhu permukaan lahan serta mengkaji pengaruh suhu permukaan lahan terhadap elemen iklim mikro (suhu udara, kelembapan udara relatif, dan kecepatan angin). Data penginderaan jauh yang digunakan adalah citra Landsat-8 OLI/TIRS, Aqua MODIS perekaman tanggal 19 Juli 2013 dan 23 Juni 2015. Metode yang digunakan dalam penelitian ini adalah klasifikasi Maximum Likelihood, Split Windows Algorithm (SWA), Inverse Distance Weighted (IDW), dan pengukuran di lapangan. Analisis statistik yang digunakan adalah korelasi Pearson Product Moment, regresi, Confusion Matrix, dan RMS Difference. Hasil penelitian menunjukkan bahwa, data penginderaan jauh dapat digunakan untuk memperoleh informasi yang akurat untuk penutup lahan dengan akurasi 92% serta suhu permukaan lahan dengan dengan nilai RMS 5,8°C dan 4,8°C. Suhu permukaan lahan dengan suhu udara dan kelembapan udara tahun 2015 memiliki hubungan yang kuat dan siginifkan, sementara dengan kecepatan angin memiliki hubungan yang rendah dan tidak signifikan. Selain itu, hubungan pada tahun 2013 lebih rendah dibandingkan tahun 2015.Kata kunci: penutup lahan, suhu permukaan lahan, Split Windows Algorithm, elemen iklim mikro
Analisis polarimetri alos 1 palsar untuk zonasi mineral alterasi hidrotermal di kabupaten Soppeng Sulawesi Selatan Anugerah Ramadhian AP; Retnadi Heru Jatmiko; Wirastuti Widyatmanti
Jurnal Teknosains Vol 10, No 1 (2020): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.51031

Abstract

Radar technology in remote sensing can be used for a variety of mapping, such as geological mapping. Soppeng Regency, South Sulawesi has a complex geological condition characterized by structural and intrusion phenomena with old materials. The phenomenon is an indicator of hydrothermal alteration due to magma intrusion activity in the rock bedding. Radar imagery is able to identify hydrothermal alteration zones through physical approaches such as landforms, rock (lithology), and geological structures. The aim of this research to explore the ability of radar polarization to identify hydrothermal alteration parameters and distribution pattern in Soppeng Regency. The physical characteristics are obtained from visual interpretation of the ALOS-1 PALSAR multi-polarization imagery with terrain analysis approach. Sample data is needed for petrographic analysis to determine rock minerals content. Analysis of physical characteristics and petrographic analysis were used to determine the type and distribution of hydrothermal alteration zones. The result of this study are ALOS-1 PALSAR imagery can be used to produce information on landform, rocks (lithology), and geological structures with total accuracy 83,9%. The hydrothermal alteration zone in Soppeng Regency consists of argillic 221,662 km², advanced argillic 20,239 km², phyllic 94,790 km², potassic 46,678 km², propylitic 328,746 km², sub-propylitic 181,517 km², and skarn 75,635 km².
GIS Application for Water Quality Suitability Mapping to Optimize Floating Net Cages Cultivation in Lampung Bay Arief Wicaksono; Ariani Puji Astuti; Wirastuti Widyatmanti
Journal of Applied Geospatial Information Vol 4 No 1 (2020): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5.29 KB) | DOI: 10.30871/jagi.v4i1.1162

Abstract

Lampung bay is one of potential aquaculture for floating net cages. Site selection for cultivation is influential on the floating net cages cultivation production, while currently selected sites have not considered water quality suitability criteria. The study goals are to identify the optimal site for cage cultivation based on the water quality suitability and to examine the main affecting factor for the suitability of cage cultivation in Lampung Bay. The water quality suitability parameters including water depth, water clarity, current speed, sea surface temperature, salinity, pH, and dissolved oxygen. Field survey was conducted on the southern part of Lampung Bay which is close to the coastal urban area. The tools used consisted of GPS navigation, pH meter, secchi disk, refractometer, bathimeter, digital thermometer, current meter, DO meter, and sample bottles. There are 32 sampling points which are distributed systematically. Inverse Distance Weighted is used to obtain the spatial distribution of parameters. The water environment suitability is carried out using two models from the weighting result using GIS, i.e. binary model and weighted model. Based on these model, the optimal area for cage cultivation are 17.41% (200.97 ha) and 65.95% (761.29 ha) using binary and weighted model respectively. The most influential parameter in order to promote sustainable cage cultivation are the water depth parameter with the consideration of the pattern similarity with the final model. Physical waters suitability map produced from this study provides valuable information for farmers and decision makers in Lampung Province so the cages cultivation in Lampung Bay can continue and obtain the optimal results.
Pemetaan Lahan Kritis Untuk Analisis Kesesuaian Pemanfaatan Lahan di Kabupaten Kulon Progo Wirastuti Widyatmanti; Sigit Heru Murti; Prima Dinta Syam
Jurnal Pengabdian dan Pengembangan Masyarakat Vol 1, No 1 (2018): MAY
Publisher : Pengabdian dan Pengembangan Masyarakat Sekolah Vokasi UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jp2m.41024

Abstract

Uncontrolled and unsupported changes in land use by good watershed conservation efforts will lead to degradation of watershed quality, caused by declining land functions as buffer zones, both from production and water availability aspects. Therefore, efforts should be made to improve the function and land use so that the watershed quality is in a balanced and sustainable condition. One way that can be implemented to make land use arrangements is to look at the critical aspect of land in the region. This study aims to map critical lands in Kulon Progo regency using spatial data analysis from remote sensing image interpretation and existing thematic maps; and analyze the linkage between existing land use to existing critical land. Spatial analysis is done by overlaying some spatial data (critical land determinants) to generate a new mapping unit to be used as an analytical unit. The scoring method accommodates different types of parameter data available to determine the degree of criticality of the land. The result of the analysis shows that in Kulon Progo Regency 16.7% or 9541,21 ha from the area of the district is uncritical, while 47.8% or 27,397 ha is potentially critical land, or if not managed properly can become critical land; and 35.5% or 20,329 ha are areas with land critical status from somewhat critical, critical to very critical.
PEMETAAN POLA SPASIAL KEBAKARAN HUTAN DAN LAHAN DI TAMAN NASIONAL GUNUNG MERBABU BERBASIS PENGINDERAAN JAUH TAHUN 2019 Inu Kencana Hadi; Sigit Heri Mukti; Wirastuti Widyatmanti
Jurnal Geografika (Geografi Lingkungan Lahan Basah) Vol 2, No 1 (2021): GEOGRAFIKA
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (422.981 KB) | DOI: 10.20527/jgp.v2i1.4536

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Abstrak: Indonesia merupakan negara dengan hutan tropis terluas ketiga di dunia, namun hampir setengah dari hutan Indonesia sudah terdegradasi. Salah satu penyebab terjadinya degradasi hutan adalah kebakaran. Secara historis, kebakaran hutan dan lahan adalah fenomena yang terus berulang di semua wilayah berhutan di Indonesia. Kebakaran hutan di Taman Nasional Gunung Merbabu yang terjadi hampir setiap tahun merupakan permasalahan yang serius, terutama pada bulan-bulan kering. Tercatat dalam sepuluh tahun terakhir yaitu antara bulan September 2014 hingga bulan September 2019, terjadi 4 kali kebakaran yang cukup besar. Dalam studi ini, kami menggunakan algoritma untuk mengestimasi kebakaran menggunakan deret waktu citra Landsat-8 OLI. Pendekatan ini diuji di area Taman Nasional Gunung Merbabu menggunakan 2 citra yang diperoleh antara bulan Juni – September 2019. Akurasi keseluruhan 85% diperoleh berdasarkan Overall Accuracy dan Kappa hat Classification. Hal ini menunjukkan bahwa algoritma yang digunakan memiliki potensi yang tinggi untuk diterapkan di lanskap lain dalam studi mendatang.Kata Kunci: NBR, Kebakaran Hutan, Tingkat Keparahan Kebakaran, Penginderaan Jauh
TSUNAMI HAZARD MODELING IN THE COASTAL AREA OF KULON PROGO REGENCY Dwiana Putri Setyaningsih; Hubertus Ery Cantas Pratama Sutiono; Amelia Rizki Gita Paramanandi; Ernani Uswatun Khasanah; Tri Wahyuni; Bernadeta Aurora Edwina Kumala Jati; Muhammad Falakh Al Akbar; Wirastuti Widyatmanti; Totok Wahyu Wibowo
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 19 No. 2 (2022)
Publisher : Ikatan Geografi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.ijreses.2022.v19.a3822

Abstract

Kulon Progo Regency is located in the southern part of Java Island, one of Indonesia's areas that is prone to tsunami disasters. Kulon Progo Regency is prone to tsunamis because it faces a subduction zone in the Indian Ocean. Therefore, it is necessary to model tsunami inundation and map the tsunami hazard zone in the Kulon Progo coastal area. This study aims to model tsunami inundation and produce a tsunami hazard map with a tsunami height scenario of 5 meters and 10 meters. The method used in modeling tsunami inundation is using a mathematical calculation developed by Berryman-2006 using the parameters of the coefficient of surface roughness, slope, and the height of the tsunami at the coastline. The estimated tsunami inundation area is classified into a tsunami hazard index using the fuzzy logic method resulting in an index of 0 – 1, which is then divided into three hazard classes. The results of the tsunami hazard mapping with the 5 meters scenario are 15 villages in 4 sub-districts included in the hazard zone with a total area of 20672,34 Ha affected. The results of the tsunami hazard mapping with a 10 meters scenario are 26 villages in 4 sub-districts with a total area of 53042,66 Ha affected. The results of this research can be used as basic information for disaster mitigation.
Co-Authors Amelia Rizki Gita Paramanandi Anugerah Ramadhian AP Ariani Puji Astuti Arief Wicaksono Arief Wicaksono, Arief Astuti, Ariani Puji Bernadeta Aurora Edwina Kumala Jati D, Ridho Dwi Dewi, Nur khovia Dwiana Putri Setyaningsih Dwininta, Aglis C Ernani Uswatun Khasanah Estigade, Andiyanti Putri Habibi, Muhammad H Hadi, Inu Kencana Henny K, Eleonora E Hubertus Ery Cantas Pratama Sutiono Ikhwansyah, Firdian Jatmiko, Retnadi Heru Kalam, Nur H Laksitaningrum, Kusuma Wardani Maitela, Tika Maulidyah, Fonna Muhammad Falakh Al Akbar P, Sufiyana Eka Prima Dinta Syam Puspitasari, Bety Rahayu, Ernawati T Retnadi Heru Jatmiko Rivani, Anggia Ruslisan, Ruslisan Sarah N.F., Zealandia Sigit Heri Mukti Sigit Heru Murti Totok Wahyu Wibowo Tri Wahyuni Zahrotunisa, Siti