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Geospatial Assessment of Coseismic Landslides in Baturagung Area Saputra, Aditya; Sartohadi, Junun; Hadmoko, Danang Sri; Gomez, Christopher
Forum Geografi Vol 29, No 2 (2015): Forum Geografi
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Java, the most densely populated island in Indonesia, is located on top of the most seismically active areas in Southeast Asia: the Sunda Megathrust. This area is frequently hit by strong earthquake. More than 3,300 M>5earthquakesoccurred between 1973-2014. The wide range of mountainous areas and high intensity of rainfall, make several part of the island one of the most exposed regions for coseismic landslides such as Baturagung area, the Southeast mountainous area of Yogyakarta Province. An integrated method between RS and GIS was used to conduct the vulnerability assessment due to the lack of the site specific slope instability analysis and coseismic landslides data. The seismic zonation of Baturagung area was obtained based on the analysis of Kanai attenuation. The geologic information was extracted using remote sensing interpretation based on the 1:100,000 geologic map of Yogyakarta and geomorphologic map of Baturagung area as well. The coseismic landslide hazard assessment has been estimated using scoring analysis in the GIS platform proposed by Mora and Vahrson (1993) with several modification. The accomplished coseismic landslide hazard map shows medium hazard coverage in the eastern areas, in the upper slope of Baturagung area, which consists of Semilir Formation. The result provides a distinct description of coseismic landslides hazard distribution in Batuaragung area. However, it should only be the preliminary assessment of the site specific investigation especially on valuable area or asset. 
Photogrammetry-based Texture Analysis of a Volcaniclastic Outcrop-peel: Low-cost Alternative to TLS and Automation Potentialities using Haar Wavelet and Spatial-Analysis Algorithms Gomez, Christopher; Kataoka, Kyoko; Saputra, Aditya; Wassmer, Patrick; Urabe, Atsushi; Morgenroth, Justin; Kato, Akira
Forum Geografi Vol 31, No 1 (2017): July 2017
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v31i1.3977

Abstract

Numerous progress has been made in the field of applied photogrammetry in the last decade, including the usage of close-range photogrammetry as a mean of conservation and record of outcrops. In the present contribution, we use the SfM-MVS method combined with a wavelet decomposition analysis of the surface, in order to relate it to morphological and surface roughness data. The results demonstrated that wavelet decomposition and RMS could provide a rapid insight on the location of coarser materials and individual outliers, while arithmetic surface roughness were more useful to detect units or layers that are similar on the outcrop. The method also emphasizes the fact that the automation of the process does not allows clear distinction between any artefact crack or surface change and that human supervision is still essential despite the original goal of automating the outcrop surface analysis.
Geospatial Assessment of Coseismic Landslides in Baturagung Area Saputra, Aditya; Sartohadi, Junun; Hadmoko, Danang Sri; Gomez, Christopher
Forum Geografi Vol 29, No 2 (2015): December 2015
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v29i2.693

Abstract

Java, the most densely populated island in Indonesia, is located on top of the most seismically active areas in Southeast Asia: the Sunda Megathrust. This area is frequently hit by strong earthquake. More than 3,300 M>5earthquakesoccurred between 1973-2014. The wide range of mountainous areas and high intensity of rainfall, make several part of the island one of the most exposed regions for coseismic landslides such as Baturagung area, the Southeast mountainous area of Yogyakarta Province. An integrated method between RS and GIS was used to conduct the vulnerability assessment due to the lack of the site specific slope instability analysis and coseismic landslides data. The seismic zonation of Baturagung area was obtained based on the analysis of Kanai attenuation. The geologic information was extracted using remote sensing interpretation based on the 1:100,000 geologic map of Yogyakarta and geomorphologic map of Baturagung area as well. The coseismic landslide hazard assessment has been estimated using scoring analysis in the GIS platform proposed by Mora and Vahrson (1993) with several modification. The accomplished coseismic landslide hazard map shows medium hazard coverage in the eastern areas, in the upper slope of Baturagung area, which consists of Semilir Formation. The result provides a distinct description of coseismic landslides hazard distribution in Batuaragung area. However, it should only be the preliminary assessment of the site specific investigation especially on valuable area or asset. 
Analisa debit banjir rencana dengan metode hidograf satuan sintetis nakayasu di daerah aliran sungai cimandiri Saputra, Aditya; Saputri, Utamy Sukmayu
Jurnal TESLINK : Teknik Sipil dan Lingkungan Vol 3 No 1 (2021): Maret 2021
Publisher : Universitas Nusa Putra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52005/teslink.v2i1.61

Abstract

Daerah Aliran Sungai (DAS) merupakan wilayah yang dibatasi oleh topografi dimana iar yang berada di wilayah tersebut mengalir ke Outlet sungai Utama hingga ke hilir (Sandy, 1996). Dengan kata lain daerah aliran sungai menjadi wilayah muka bumi yang airnya mengalir ke sungai yang ada diwilayah tersebut apabila hujan jatuh. Das Cimandiri adalah salah satu Daerah Aliran Sungai yang mengalir di provinsi Jawa barat. Sungai ini merupakan sungai yang berhulu dari Kompleks pegunungan Gede-Pangrango pada bagian Timur laut dan Gunung salak pada bagian utaranya, mengalir menuju teluk Pelabuhan Ratu di Selatan Jawa Barat. Penelitian ini bertujuan untuk mengetahui besarnya rancangan curah hujan harian maksimum dan nilai debit hujan Sungai Cimandiri dengan kala ulang 2, 5, 10, 50 dan 100 tahun. Dalam menghitung Hujan Rancangan menggunakan Metode Log Person Tipe III dengan kala ulang 2, 5, 10, 50, dan 100 tahun. Dan untuk perhitungan Debit Banjir Menggunakan Hidrograf Satuan Sintetis Nakayasu dengan kala ulang 2, 5, 10, 50, dan 100 tahun. Hujan rancangan dengan metode Log Pearson III mendapat nilai kala ulang 2 tahun 53,3 mm, kala ulang 5 tahun 71,5 mm, kala ulang 10 tahun 84,4 mm, kala ulang 50 tahun 186,9 mm dan kala ulang 100 tahun 126,8 mm. Perhitungan debit banjir menggunakan HSS Nakayasu mendapat nilai kala ulang 2 tahun 2863,8 m3/detik, kala ulang 5 tahun 3840,5 m3/detik, kala ulang 10 tahun 4534,5 m3/detik, kala ulang 50 tahun 6098,9 m3/detik, dan kala ulang 100 tahun 6806,1 m3/detik. Kata Kunci: Hidrologi, Debit Banjir, HSS Nakayasu
Analisis Potensi Pencemaran Air Tanah Bebas di Lereng Kaki Koluvial dan Dataran Aluvial Daerah Aliran Sungai Pesing Menggunakan Integrasi Metode GOD dan SIG Berbasis Web: Analysis of Potential Groundwater Pollution in Unconfined Aquifer in Colluvial Footslopes and Alluvial Plains of the Pesing Watershed Using Integration of GOD and GIS Web Based Methods SEJATI, SADEWA PURBA; SAPUTRA, ADITYA
Jurnal Teknologi Lingkungan Vol. 23 No. 1 (2022)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (570.217 KB) | DOI: 10.29122/jtl.v23i1.4949

Abstract

ABSTRACT Agricultural, livestock, and domestic activities in the alluvial plains and the colluvial footslopes of the Pesing watershed have the potential to reduce groundwater quality in an unconfined aquifer. Environmental characteristics need to be identified spatially to determine the potential for groundwater contamination. The latest mapping technology also needs to be identified to determine its ability to disseminate information on potential groundwater pollution. The research was conducted to determine the potential for groundwater pollution and to identify the capability of a web-based GIS as a medium for disseminating geospatial information. Potential groundwater contamination was identified using the GOD method. The variables used include the type of aquifer, aquifer lithology, and groundwater depth. Variables of aquifer type and aquifer lithology are known through secondary data, namely drilling data, geological data, and literature studies. Variable groundwater depth is known through field surveys. Sampling method used is systematic random sampling. Each variable is classified and visualized in the form of a thematic map. Three variables were analyzed by the overlay method. Based on the results of the analysis, it is known that in the rainy season, the research area is classified into three classes of potential for groundwater pollution, namely extreme potential with a percentage of 27% area, high potential with a rate of 71%, and medium potential with a percentage of 2%. The potential for groundwater contamination during the dry season is classified into two classes: high potential with an area of 43% and medium potential with a percentage of 57%. Temporal dynamics of the potential for groundwater pollution are caused by a variable sensitive to seasonal changes, namely the depth of groundwater. The land uses that have the most influence on the potential for groundwater contamination are rice fields and livestock manure disposal. Web-based GIS can be used as a medium for disseminating information on potential groundwater pollution. The program can be appropriately operated on a variety of electronic devices. Web-based GIS is equipped with a variety of features that can be used interactively for fundamental to applied analysis. Keywords: groundwater, unconfined aquifer, GOD, GIS, web   ABSTRAK Aktivitas pertanian, peternakan, dan domestik di dataran aluvial dan dataran kaki koluvial DAS Pesing berpotensi menurunkan kualitas air tanah bebas. Karakteristik lingkungan perlu diidentifikasi secara spasial untuk mengetahui potensi pencemaran air tanah. Teknologi pemetaan terkini juga perlu diidentifikasi untuk mengetahui kemampuannya dalam mendiseminasi informasi potensi pencemaran air tanah. Penelitian dilakukan untuk mengetahui potensi pencemaran air tanah dan mengidentifikasi kemampuan sistem informasi geografis berbasis (SIG) web sebagai media diseminasi informasi geospasial. Potensi pencemaran air tanah diidentifikasi menggunakan metode GOD (groundwater occurrence, overall lithology of aquifer, depth to water table). Variabel yang digunakan meliputi jenis akuifer, litologi akuifer, dan kedalaman air tanah. Variabel jenis akuifer dan litologi akuifer diketahui melalui data sekunder, yaitu data pengeboran, data geologi, dan studi literatur. Variabel kedalaman air tanah diketahui melalui survei lapangan. Metode sampling yang digunakan adalah acak bersistem. Setiap variabel diklasifikasi dan divisualkan dalam bentuk peta tematik. Ketiga variabel dianalisis dengan metode overlay. Berdasarkan hasil analisis diketahui bahwa pada musim hujan daerah penelitian terklasifikasi menjadi tiga kelas potensi pencemaran air tanah bebas, yaitu potensi ekstrim dengan persentase luas 27%, potensi tinggi dengan persentase 71%, dan potensi sedang dengan persentase 2%. Potensi pencemaran air tanah pada musim kemarau terklasifikasi menjadi dua kelas, yaitu potensi tinggi dengan persentase luas 43% dan potensi sedang dengan persentase 57%. Dinamika temporal potensi pencemaran air tanah bebas disebabkan karena terdapat variabel yang sensitif terhadap perubahan musim, yaitu kedalaman air tanah. Penggunaan lahan yang paling berpengaruh terhadap potensi pencemaran air tanah adalah sawah dan lokasi pembuangan kotoran ternak. SIG berbasis web mampu digunakan sebagai media diseminasi informasi potensi pencemaran air tanah bebas. Program dapat dioperasikan dengan baik pada beragam perangkat elektronik. Program dilengkapi dengan beragam fitur yang dapat digunakan secara interaktif untuk analisis dasar hingga terapan. Kata kunci: air tanah, akuifer bebas, GOD, SIG, web
PEMETAAN KERENTANAN BANGUNAN TEMPAT TINGGAL TERHADAP BAHAYA GEMPABUMI DI KECAMATAN PLERET KABUPATEN BANTUL TAHUN 2012 Aditya Saputra
Semantik Vol 2, No 1 (2012): Prosiding Semantik 2012
Publisher : Semantik

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (247.259 KB)

Abstract

Kecamatan Pleret merupakan salah satu daerah yang rawan gempabumi. Terbukti pada gempabumi 27 Mei 2006, Kecamatan Pleret mengalami kerusakan yang sangat parah. Penelitian ini dilakukan untuk mengetahui kondisi kerentanan bangunan tempat tinggal terhadap gempabumi menggunakan prosedur rapid visual screening of building for potential seismic hazard. Metode yang digunakan dalam penelitian ini adalah integrasi antara penginderaan jauh, sistem informasi geografis, dan observasi di lapangan. Berdasarkan interpretasi visual citra ASTER komposit 3, 4, PCA 56789 didapatkan empat satuan litologi di Kecamatan Pleret. Keempat satuan litologi tersebut adalah Endapan Gunungapi Merapi Muda(Qmi), Endapan Aluvial hasil rombakan material Formasi Semilir dan Nglanggran (Qa), Formasi Nglanggran (Tmn), danFormasi Semilir (Tmse). Keempat satuan litologi tersebut memberikan kenampakan yang berbeda-beda pada citra ASTERkomposit 3, 4, PCA 56789. Formasi Semilir yang didominasi oleh perselingan antara breksi batuapung dan breksi-tuf memberikan kesan rona/ warna biru cerah dengan bercak merah kecoklatan. Formasi Nglanggran yang didominasi olehbreksi volkanik dan breksi aliran memberikan kesan rona/ warna yang lebih gelap yaitu merah kecoklatan dengan bercakbiru cerah. Endapan Gunungapi Merapi Muda dan Endapan Aluvial rombakan material Formasi Semilir dan Nglanggran memberikan kesan rona/ warna yang hampir sama yaitu berwarna hijau kebiruan dan coklat kemerahan. Berdasarkan interpretasi citra Quickbird dapat diketahui bahwa tipe atap bangunan tempat tinggal di Kecamatan Pleret didominasi oleh tipe atap kampung reguler yaitu 89,50%, sedangkan struktur bangunan didominasi oleh tipe struktur pasangan batubata diperkuat dengan diafragma rigid (RM2) yaitu 92,08%. Tipe struktur RM2 memiliki skor rapid visual screening of building for potential seismic hazard yang tinggi yaitu diatas 1,75. Nilai ini menunjukkan bahwa tipe struktur RM2 memiliki tingkat kerentanan yang rendah.Kata kunci : kerentanan bangunan, litologi, struktur bangunan
Geospatial Assessment of Coseismic Landslides in Baturagung Area Aditya Saputra; Junun Sartohadi; Danang Sri Hadmoko; Christopher Gomez
Forum Geografi Vol 29, No 2 (2015): December 2015
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v29i2.693

Abstract

Java, the most densely populated island in Indonesia, is located on top of the most seismically active areas in Southeast Asia: the Sunda Megathrust. This area is frequently hit by strong earthquake. More than 3,300 M5earthquakesoccurred between 1973-2014. The wide range of mountainous areas and high intensity of rainfall, make several part of the island one of the most exposed regions for coseismic landslides such as Baturagung area, the Southeast mountainous area of Yogyakarta Province. An integrated method between RS and GIS was used to conduct the vulnerability assessment due to the lack of the site specific slope instability analysis and coseismic landslides data. The seismic zonation of Baturagung area was obtained based on the analysis of Kanai attenuation. The geologic information was extracted using remote sensing interpretation based on the 1:100,000 geologic map of Yogyakarta and geomorphologic map of Baturagung area as well. The coseismic landslide hazard assessment has been estimated using scoring analysis in the GIS platform proposed by Mora and Vahrson (1993) with several modification. The accomplished coseismic landslide hazard map shows medium hazard coverage in the eastern areas, in the upper slope of Baturagung area, which consists of Semilir Formation. The result provides a distinct description of coseismic landslides hazard distribution in Batuaragung area. However, it should only be the preliminary assessment of the site specific investigation especially on valuable area or asset. 
Photogrammetry-based Texture Analysis of a Volcaniclastic Outcrop-peel: Low-cost Alternative to TLS and Automation Potentialities using Haar Wavelet and Spatial-Analysis Algorithms Christopher Gomez; Kyoko Kataoka; Aditya Saputra; Patrick Wassmer; Atsushi Urabe; Justin Morgenroth; Akira Kato
Forum Geografi Vol 31, No 1 (2017): July 2017
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v31i1.3977

Abstract

Numerous progress has been made in the field of applied photogrammetry in the last decade, including the usage of close-range photogrammetry as a mean of conservation and record of outcrops. In the present contribution, we use the SfM-MVS method combined with a wavelet decomposition analysis of the surface, in order to relate it to morphological and surface roughness data. The results demonstrated that wavelet decomposition and RMS could provide a rapid insight on the location of coarser materials and individual outliers, while arithmetic surface roughness were more useful to detect units or layers that are similar on the outcrop. The method also emphasizes the fact that the automation of the process does not allows clear distinction between any artefact crack or surface change and that human supervision is still essential despite the original goal of automating the outcrop surface analysis.
Predisposition Factor of Safety of Landslide Dams from Typhoon Talas, Kii Peninsula, Japan Daikai Rikuto; Gomez Christopher; Balazs Bradak; Aditya Saputra; Danang Sri Hadmoko
Forum Geografi Vol 36, No 2 (2022): December 2022
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v36i2.20668

Abstract

Landslide dams are less frequent than other landslides, and their very existence is often very-much short-lived, because the temporary dam tends to collapse rapidly. Because of the resulting lack of evidences, there has been less research done on this topic, although the potential catastrophe they can be at the origin of needs assessment. For this purpose, the present contribution aims at differentiating landslides that trigger dams against those that do not inside a group of valleys of the Kii peninsula in Japan, where landslides occurred af-ter the typhoon Talas in 2011. Using topographic map before the event and LiDAR data in its aftermath, the authors have calculated the factor of safety (FS) of different landslides in the same valleys, comparing the da-ta of landslides that created dams against those that did not. The results show that landslides that triggered dams seemed to have a higher FS than those that did not. The authors suggest that it is because larger land-slides are needed and thus appear more stable, but also because at the location where the slopes are stable, the riverbed can incise further instead of growing horizontally, and thus the sediments damming the channel have more chances to block it (as it is narrow) and stop the river from flowing.
Pemetaan Partisipatif Potensi untuk Arahan Pengembangan Desa Patemon Kabupaten Purbalingga Danardono Danardono; Aditya Saputra; M. Iqbal Taufiqurrahman Sunariya; Stevie Husein; Syahid Nur Khotib; Saiful Ridwan
BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 1 (2024)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jb.v5i1.7518

Abstract

Desa Patemon merupakan desa yang memiliki kekayaan potensi baik dari sisi kondisi fisik, sosial, ekonomi, dan kebudayaan lokal. Disisi lain muncul beberapa masalah yang dihadapi Desa Patemon seperti kondisi pendapatan desa yang sangat kecil serta masalah persampahan. Adanya potensi dan masalah di Desa Patemon belum teridentifikasi dan dipetakan sebelumnya sehingga perlu dilakukan pendampingan dalam upaya pemetaan potensi dan masalah tersebut. Selain itu, adanya potensi dan masalah perlu dirumuskan secara bersama dengan adanya fasilitasi untuk merumuskan rencana pengembangan desa berbasis potensi dan masalah. Oleh karena itu maka kegiatan pengabdian masyarakat ini bertujuan untuk meningkatkan kesadaran masyarakat Desa Patemon dalam mengelola potensi desa, menghasilkan rencana pengembangan desa yang ditentukan secara bersama dengan masyarakat, serta peningkatan kesejahteraan masyarakat dengan adanya pengembangan desa. Metode yang digunakan untuk mengkaji pengembangan desa dilaksanakan dengan metode Participatory Mapping. Kegiatan dilaksanakan dalam tiga tahapan yaitu inventarisasi potensi dan masalah di Desa Patemon pada tiap dusun, survei lapangan bersama masyarakat terhadap potensi di Desa Patemon, dan terakhir FGD dengan fasilitator untuk merumuskan arahan pengembangan Desa Patemon. Hasil menunjukkan bahwa terdapat banyak potensi yang dapat dikembangkan di Desa Patemon baik dari sisi alam (Lembah Silangit dan Mataair), budaya lokal (Ebeg Banyumasan) dan UMKM (abon lele, olahan nanas, produk pengolah sampah). Berdasarkan potensi tersebut maka disusun arahan pengembangan Desa Patemon berupa Integrated Water Tourism. Hasil arahan pengembangan desa ini akan mengembangkan sektor wisata perairan dengan atraksi wisata utama yaitu Kawasan Lembah Silangit dan disertai beberapa atraksi wisata pendukung seperti sumber mataair, sektor UMKM sebagai souvenir wisata, dan sektor wisata budaya.
Co-Authors Akira Kato Al-Ghowazi, Sholakhuddin Akhmad Altair, Garin Rachmad Ari Prasetyo Aryadewi, Ni Komang Chintya Atsushi Urabe Atussolihah, Mar Aulia, Hanung Garnish Baihaqi , Akhmad Balazs Bradak Batu Bara, Fidia Dewi Wulandari Chandrahadinata, Doddy Christopher Gomez Christopher Gomez Christopher Gomez, Christopher Daikai Rikuto Danang Sri Hadmoko Danang Sri Hadmoko Danang Sri Hadmoko Danardono Danardono Danardono, Danardono Danovan, Adryan Marcellino DEDI SURACHMAN, DEDI Deviana, Kadek Saskia Amelia Dewi Indriani Farida, Rahma Afifah Nur Fitrah, Rahma Hidayati Fransisca, Christina Gomez Christopher Hidayat, Rusdi Ilahi, Bogy Restu Junun Sartohadi Justin Morgenroth Kataoka, Kyoko Kato, Akira Kumala Dewi, Dinda Kusumasari, Indah Kyoko Kataoka Lenny Christina Nawangsari Lestari, Hesi Desta Lharasati Dewi M Iqbal Taufiqurrahman Sunariya Morgenroth, Justin Muhammad Natsir Muliyani, Deta Nadia Alfitri Nafisah, Fathiyya Novrian, Wili Pakpahan, Dinda Krisnauli Patrick Wassmer Permadi , Angga Repi Permadi, Andes Priska , Novelin Puji Lestari, Marsela Putra , Christian Ade Putra, Said Willya Rahmadan, Bavio Robia Rahmadi, Dinda Putri Roza Susanti Saiful Ridwan Samba, Nayelli Mi'raz Saputri, Utamy Sukmayu Sefudin, Akhmad Sejati, Sadewa Purba Setiawan, Ilyas Nur Sitanggang , Adrian Milan Baros Situmorang, Gurilina Sri Sunarsih Stevie Husein Suartawan, Putu Eka Subhan, Robi Septian Sulistyaningsih, Eka Sutisyana, ari Syafrial Syahid Nur Khotib Urabe, Atsushi Wangsa, Gede Dinar Waskito, Tri Putra Wassmer, Patrick Wibowo, Afif Ari Widyatmika, I Gusti Ayu Made Wahyu Wirawan, I Gede Yudi Setiawan Yul Antonisfia Yultrisna Yultrisna