Pub Date : 2021-07-29DOI: 10.29122/alami.v5i1.4864
Mulyo Harris Pradono, Shafira Rahmadilla Hape, Ahmad Fauzi Yunus, Muhammad Ravi Yufhendmindo
Gempa Mamuju pada 15 Januari 2021 merusak beberapa bangunan di Kota Mamuju. Pusat gempa berjarak sekitar 34 km dari kota. Menurut BMKG, intensitas gempa di Mamuju adalah VI MMI dengan percepatan puncak getaran gempa tercatat 150 gal (1,5 m/det2). Terjadi kerusakan yang mengakibatkan runtuhnya banyak bangunan, sehingga dipandang perlu untuk melakukan penilaian terhadap bangunan-bangunan di Mamuju. Dalam makalah ini, pemodelan dilakukan untuk bangunan yang disurvei yang mewakili bangunan rusak sedang dan rusak ringan. Beberapa bangunan dibangun sebelum tahun 2010, sehingga standar yang digunakan untuk merancang bangunan adalah SNI 1726 2002. Dalam SNI ini, Kota Mamuju masih dalam kategori zona gempa rendah. Dalam standar SNI 2012 dan 2019, kota Mamuju berada dalam bahaya gempa yang lebih tinggi. Pemodelan bangunan yang dibangun mengacu pada standar 2002 dan 2019 perlu dilakukan untuk pemahaman yang lebih baik dan kemungkinan perkuatan.
{"title":"Pemodelan Struktur Bangunan di Mamuju Pasca Gempabumi 15 Januari 2021","authors":"Mulyo Harris Pradono, Shafira Rahmadilla Hape, Ahmad Fauzi Yunus, Muhammad Ravi Yufhendmindo","doi":"10.29122/alami.v5i1.4864","DOIUrl":"https://doi.org/10.29122/alami.v5i1.4864","url":null,"abstract":"Gempa Mamuju pada 15 Januari 2021 merusak beberapa bangunan di Kota Mamuju. Pusat gempa berjarak sekitar 34 km dari kota. Menurut BMKG, intensitas gempa di Mamuju adalah VI MMI dengan percepatan puncak getaran gempa tercatat 150 gal (1,5 m/det2). Terjadi kerusakan yang mengakibatkan runtuhnya banyak bangunan, sehingga dipandang perlu untuk melakukan penilaian terhadap bangunan-bangunan di Mamuju. Dalam makalah ini, pemodelan dilakukan untuk bangunan yang disurvei yang mewakili bangunan rusak sedang dan rusak ringan. Beberapa bangunan dibangun sebelum tahun 2010, sehingga standar yang digunakan untuk merancang bangunan adalah SNI 1726 2002. Dalam SNI ini, Kota Mamuju masih dalam kategori zona gempa rendah. Dalam standar SNI 2012 dan 2019, kota Mamuju berada dalam bahaya gempa yang lebih tinggi. Pemodelan bangunan yang dibangun mengacu pada standar 2002 dan 2019 perlu dilakukan untuk pemahaman yang lebih baik dan kemungkinan perkuatan.","PeriodicalId":270402,"journal":{"name":"Jurnal Alami : Jurnal Teknologi Reduksi Risiko Bencana","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125140095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-29DOI: 10.29122/alami.v5i1.4725
Raditya Panji Umbara
Technological failure and natural disasters that caused the dam-break resulted in huge losses, both material loss and loss of life. The mathematical model for the dam-break can use the shallow water equation. In this paper, modeling the dam-break in two dimensions is solved by using the finite volume method with a stagerred-grid scheme. The staggered-grid scheme produces more accurate and robust when compared to the Lax-Friedrics scheme. The stability of the water waves on the part of the damaged dam wall is also well preserved using a staggered-grid scheme. Modeling a dam-break with real bathymetric data will be a challenge for further research, because it involves a more complex geometry.
{"title":"Simulasi Numerik Persamaan Gelombang Air Dangkal untuk Kasus Bendungan Bobol","authors":"Raditya Panji Umbara","doi":"10.29122/alami.v5i1.4725","DOIUrl":"https://doi.org/10.29122/alami.v5i1.4725","url":null,"abstract":"Technological failure and natural disasters that caused the dam-break resulted in huge losses, both material loss and loss of life. The mathematical model for the dam-break can use the shallow water equation. In this paper, modeling the dam-break in two dimensions is solved by using the finite volume method with a stagerred-grid scheme. The staggered-grid scheme produces more accurate and robust when compared to the Lax-Friedrics scheme. The stability of the water waves on the part of the damaged dam wall is also well preserved using a staggered-grid scheme. Modeling a dam-break with real bathymetric data will be a challenge for further research, because it involves a more complex geometry.","PeriodicalId":270402,"journal":{"name":"Jurnal Alami : Jurnal Teknologi Reduksi Risiko Bencana","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126933443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-29DOI: 10.29122/alami.v5i1.4841
Puspa Khaerani, Heru Sri Naryanto, Dian Nuraini Melati, Syakira Trisnafiah
The construction of an underwater fiber-optic cable-based tsunami early detection system is planned to be installed in the Makassar Strait with a landing point in West Sulawesi. Land infrastructure such as a Power House (PH), a communication tower, and a Beach Manhole (BMH) is needed to sustain the system's power in order to survive. Therefore, the aim of this scientific paper is to study several alternative landing station locations in Pasangkayu, West Sulawesi and then determine the priority locations. The methods used to achieve these objectives are field observation methods and secondary data analysis based on parameters of land area conditions, environmental conditions, supporting infrastructure, social conditions and licensing systems, and marine activities. These aspects are then assessed to determine the priority of the selected location. The location selected based on the assessment carried out is ALT-02B. In succession, the three priority locations selected from the order of most priority to least priority are ALT-02B, ALT-02A, and ALT-06. This selected priority location is not necessarily the final choice location to be used in the construction of a tsunami early detection system land infrastructure because in the process there are still things to be considered and aspects that are made the main priority for consideration in making decisions.
{"title":"Kajian Landing Station Alat Deteksi Dini Tsunami Berbasis Kabel Serat Optik Bawah Laut di Kabupaten Pasangkayu, Sulawesi Barat","authors":"Puspa Khaerani, Heru Sri Naryanto, Dian Nuraini Melati, Syakira Trisnafiah","doi":"10.29122/alami.v5i1.4841","DOIUrl":"https://doi.org/10.29122/alami.v5i1.4841","url":null,"abstract":"The construction of an underwater fiber-optic cable-based tsunami early detection system is planned to be installed in the Makassar Strait with a landing point in West Sulawesi. Land infrastructure such as a Power House (PH), a communication tower, and a Beach Manhole (BMH) is needed to sustain the system's power in order to survive. Therefore, the aim of this scientific paper is to study several alternative landing station locations in Pasangkayu, West Sulawesi and then determine the priority locations. The methods used to achieve these objectives are field observation methods and secondary data analysis based on parameters of land area conditions, environmental conditions, supporting infrastructure, social conditions and licensing systems, and marine activities. These aspects are then assessed to determine the priority of the selected location. The location selected based on the assessment carried out is ALT-02B. In succession, the three priority locations selected from the order of most priority to least priority are ALT-02B, ALT-02A, and ALT-06. This selected priority location is not necessarily the final choice location to be used in the construction of a tsunami early detection system land infrastructure because in the process there are still things to be considered and aspects that are made the main priority for consideration in making decisions.","PeriodicalId":270402,"journal":{"name":"Jurnal Alami : Jurnal Teknologi Reduksi Risiko Bencana","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129158759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-29DOI: 10.29122/alami.v5i1.4736
Heru Sri Naryanto
Sebagian wilayah Kabupaten Penajam Paser Utara dan sebagian Kabupaten Kutai Kartanegara di Provinsi Kalimantan Timur secara resmi telah ditunjuk menjadi calon Ibu Kota Negara (IKN) Indonesia baru. Untuk untuk memberi rasa aman kepada masyarakat di calon ibukota baru tersebut nantinya akan dibangun sistem peringatan dini bencana tsunami. Selat Makassar terletak pada persimpangan tiga lempeng, yaitu Lempeng Indo-Australia, Lempeng Eurasia dan Lempeng Pasifik, menyebabkan tektonik dan kegempaan di kawasan tersebut sangat kompleks. Potensi tsunami di Selat Makassar baik berasal dari gempa maupun longsor bawah laut termasuk tinggi. Potensi tsunami yang disebabkan oleh gempa berasal dari megathrust Sulawesi Utara dan sesar-sesar naik yang berada di perairan Selat Makassar. Sementara longsor bawah laut diakibatkan oleh batuan tidak kompak pada morfologi curam serta longsor bawah laut akibat pergerakan sesar akibat goncangan gempa. Potensi longsor bawah laut sangat mungkin terjadi akibat longsornya endapan produk Delta Mahakam yang bermuara di Selat Makassar. Dalam merencanakan jalur kabel InaCBT diusahakan jalur kabel bisa melewati endapan Delta Mahakam yang berpotensi longsor bawah laut, memotong topografi terjal, memperhatikan kondisi batimetri, serta menyesuaikan master plan kabel laut dari Kementerian KKP. Alternatif rencana jalur kabel InaCBT di Selat Makassar yang paling baik dengan mempertimbangkan berbagai aspek tersebut adalah dari Kota Balikpapan – Kecamatan Sarudu (Kabupaten Pasangkayu).
{"title":"Analisis Sumber Tsunami untuk Pertimbangan Perencanaan Jalur Kabel InaCBT di Selat Makasar","authors":"Heru Sri Naryanto","doi":"10.29122/alami.v5i1.4736","DOIUrl":"https://doi.org/10.29122/alami.v5i1.4736","url":null,"abstract":"Sebagian wilayah Kabupaten Penajam Paser Utara dan sebagian Kabupaten Kutai Kartanegara di Provinsi Kalimantan Timur secara resmi telah ditunjuk menjadi calon Ibu Kota Negara (IKN) Indonesia baru. Untuk untuk memberi rasa aman kepada masyarakat di calon ibukota baru tersebut nantinya akan dibangun sistem peringatan dini bencana tsunami. Selat Makassar terletak pada persimpangan tiga lempeng, yaitu Lempeng Indo-Australia, Lempeng Eurasia dan Lempeng Pasifik, menyebabkan tektonik dan kegempaan di kawasan tersebut sangat kompleks. Potensi tsunami di Selat Makassar baik berasal dari gempa maupun longsor bawah laut termasuk tinggi. Potensi tsunami yang disebabkan oleh gempa berasal dari megathrust Sulawesi Utara dan sesar-sesar naik yang berada di perairan Selat Makassar. Sementara longsor bawah laut diakibatkan oleh batuan tidak kompak pada morfologi curam serta longsor bawah laut akibat pergerakan sesar akibat goncangan gempa. Potensi longsor bawah laut sangat mungkin terjadi akibat longsornya endapan produk Delta Mahakam yang bermuara di Selat Makassar. Dalam merencanakan jalur kabel InaCBT diusahakan jalur kabel bisa melewati endapan Delta Mahakam yang berpotensi longsor bawah laut, memotong topografi terjal, memperhatikan kondisi batimetri, serta menyesuaikan master plan kabel laut dari Kementerian KKP. Alternatif rencana jalur kabel InaCBT di Selat Makassar yang paling baik dengan mempertimbangkan berbagai aspek tersebut adalah dari Kota Balikpapan – Kecamatan Sarudu (Kabupaten Pasangkayu).","PeriodicalId":270402,"journal":{"name":"Jurnal Alami : Jurnal Teknologi Reduksi Risiko Bencana","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129412881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-29DOI: 10.29122/alami.v5i1.4734
Dwi Abad Tiwi
Konsep pengembangan Kawasan Transit Oriented Development (TOD) merupakan hal baru di Indonesia. Berdasarkan pengalaman di luar negeri, telah dikenal 4 macam konsep pengembangan Stasiun dan Kawasan TOD, yaitu Skala Regional, Skala Koridor, Skala Area Stasiun, dan Skala Tapak. Peraturan Menteri Nomer 16 tahun 2017 juga sudah mengakomodasi pengembangan Kawasan TOD. Beberapa kriteria dan indicator untuk pengembangan Kawasan TOD juga telah disediakan
公交导向发展（TOD）的概念在印尼还是一个新概念。根据国外的经验，车站和 TOD 区域的发展有四种概念，即区域规模、走廊规模、车站区域规模和站点规模。2017 年第 16 号部级法规也对 TOD 区域的发展做出了规定。此外，还规定了 TOD 区域发展的一些标准和指标。
{"title":"Konsep Desain Pengembangan Kawasan Tod Pada Kawasan Rawan Bencana Rob, Studi Kasus Stasiun Semarang Tawang","authors":"Dwi Abad Tiwi","doi":"10.29122/alami.v5i1.4734","DOIUrl":"https://doi.org/10.29122/alami.v5i1.4734","url":null,"abstract":"Konsep pengembangan Kawasan Transit Oriented Development (TOD) merupakan hal baru di Indonesia. Berdasarkan pengalaman di luar negeri, telah dikenal 4 macam konsep pengembangan Stasiun dan Kawasan TOD, yaitu Skala Regional, Skala Koridor, Skala Area Stasiun, dan Skala Tapak. Peraturan Menteri Nomer 16 tahun 2017 juga sudah mengakomodasi pengembangan Kawasan TOD. Beberapa kriteria dan indicator untuk pengembangan Kawasan TOD juga telah disediakan","PeriodicalId":270402,"journal":{"name":"Jurnal Alami : Jurnal Teknologi Reduksi Risiko Bencana","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128242220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-29DOI: 10.29122/alami.v5i1.4810
Hanggari Sittadewi
Vesicular-arbuscular mychorrizae (MVA) is a key player in triggering vegetation development and soil reinforcement due to its potential to increase plant growth and soil aggregate stability. In terms of enhancing plant growth, the vesicular-arbuscular mycorrhizae provides greater and more efficient access through the fungal hyphae for nutrient absorption and delivery to the plant. From the side of soil mechanical, the potential of vesicular-arbuscular mycorrhizae is to increase the soil aggregate stability. These potentials, in their application can contribute to soil and slope stability. The characteristics and biological effects of vascular-arbuscular mycorrhizae to increase plant growth and soil aggregate stability in the correlation to slope stability will be discussed in this paper.
{"title":"Efek Biologi dari Mikoriza Vesikular Arbuskular untuk Meningkatkan Pertumbuhan Tanaman dan Stabilitas Agregat Tanah","authors":"Hanggari Sittadewi","doi":"10.29122/alami.v5i1.4810","DOIUrl":"https://doi.org/10.29122/alami.v5i1.4810","url":null,"abstract":"Vesicular-arbuscular mychorrizae (MVA) is a key player in triggering vegetation development and soil reinforcement due to its potential to increase plant growth and soil aggregate stability. In terms of enhancing plant growth, the vesicular-arbuscular mycorrhizae provides greater and more efficient access through the fungal hyphae for nutrient absorption and delivery to the plant. From the side of soil mechanical, the potential of vesicular-arbuscular mycorrhizae is to increase the soil aggregate stability. These potentials, in their application can contribute to soil and slope stability. The characteristics and biological effects of vascular-arbuscular mycorrhizae to increase plant growth and soil aggregate stability in the correlation to slope stability will be discussed in this paper. \u0000 ","PeriodicalId":270402,"journal":{"name":"Jurnal Alami : Jurnal Teknologi Reduksi Risiko Bencana","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134577460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-18DOI: 10.29122/ALAMI.V4I2.4558
Akhmadi Puguh Raharjo
Trenching is a form of soil and water conservation engineering that is commonly used and is known to be effective in controlling runoff and increasing water content in the root zone of plants. There are various configurations of trench placement in the field and this study aims to simulate the placement of trench by comparing the three trench configurations to find out which configuration is most effective in capturing surface runoff. The simulation is carried out by calculating the catchment capacity of surface runoff under different rainfall intensity conditions and runoff coefficients in the three trench configurations that have different catchment areas. From the calculation, it is known that configuration 3 in optimal conditions has a comparative advantage of 41.67% - 68.80% (compared to configuration 1) and 27.78% - 52.83% (compared to configuration 2). Meanwhile, configuration 2 has a comparative advantage of 13.89% - 16.06% when compared to configuration 1. From the calculation it is also known that there are conditions where the three configurations will produce a uniform value so that there will be no comparative advantage between the three configurations. This condition is generally above the rain intensity of 50 mm per hour and the runoff coefficient is above 0.45.
{"title":"Simulasi Penempatan Rorak Sebagai Bentuk Pengoptimalan Konservasi Air","authors":"Akhmadi Puguh Raharjo","doi":"10.29122/ALAMI.V4I2.4558","DOIUrl":"https://doi.org/10.29122/ALAMI.V4I2.4558","url":null,"abstract":"Trenching is a form of soil and water conservation engineering that is commonly used and is known to be effective in controlling runoff and increasing water content in the root zone of plants. There are various configurations of trench placement in the field and this study aims to simulate the placement of trench by comparing the three trench configurations to find out which configuration is most effective in capturing surface runoff. The simulation is carried out by calculating the catchment capacity of surface runoff under different rainfall intensity conditions and runoff coefficients in the three trench configurations that have different catchment areas. From the calculation, it is known that configuration 3 in optimal conditions has a comparative advantage of 41.67% - 68.80% (compared to configuration 1) and 27.78% - 52.83% (compared to configuration 2). Meanwhile, configuration 2 has a comparative advantage of 13.89% - 16.06% when compared to configuration 1. From the calculation it is also known that there are conditions where the three configurations will produce a uniform value so that there will be no comparative advantage between the three configurations. This condition is generally above the rain intensity of 50 mm per hour and the runoff coefficient is above 0.45. \u0000 ","PeriodicalId":270402,"journal":{"name":"Jurnal Alami : Jurnal Teknologi Reduksi Risiko Bencana","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121259910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-18DOI: 10.29122/ALAMI.V4I2.4556
Teddy W. Sudinda
Analisa kestabilan lereng di lokasi tambang batubara tanah laut Kalimantan Selatan telah dilakukan analisis tegangan-perpindahan dan Faktor Keamanan (SF) dengan menggunakan program Plaxis-2D. Pada permukaan lereng komponen gravitasi yang bekerja pada tanah cenderung akan menggerakkan tanah ke bawah. Komponen gravitasi ini disebut sebagai gaya penggerak tanah. Lereng mempunyai perkuatan alami yang berasal dari komponen material tanah itu sendiri untuk melawan gaya penggerak tanah, sehingga gerakkan tanah atau kelongsoran tidak terjadi. Ada banyak metode analisis yang bisa digunakan dalam menganilisis kestabilan lereng, salah satunya adalah dengan menggunakan Metode Elemen Hingga (Finite Element Method). Permasalahan kestabilan lereng diselesaikan dengan Metoda Elemen Hingga dengan menggunakan program Plaxis 2D, dimana data analisis diperoleh dari hasil penelitian terdahulu. Data analisis merupakan kombinasi dari berbagai data analisis yaitu jenis tanah dan kemiringan lereng. Hasil analisis terdahulu dengan menggunakan program Slope-W untuk Potongan East (S-W Section), Potongan West (S-W Section), Potongan East HW (N-S Section), Potongan East LW (N-S Section) diperoleh model keruntuhan (collapse) dengan angka keamanan SF < 1.0 dan dibandingkan dengan Analisis dengan menggunakan Plaxis-2D, dimana nilai angka keamanan SF < 1 tidak bisa ditentukan. Berdasarkan analisa Slope-W diperoleh nilai SF < 1.0 (0.114) dan analisis Plaxis diperoleh nilai SF < 1 terjadi pada Potongan East (S-W Section), hal ini menunjukan bahwa Analisa dengan program Slope-W dan program Plaxis 2D mempunyai hasil yang sama dalam menentukan kemungkinan akan terjadi keruntuhan.
{"title":"Analisis Kestabilan Lereng pada Lokasi Tambang Batubara Tanah Laut Kalimantan Selatan","authors":"Teddy W. Sudinda","doi":"10.29122/ALAMI.V4I2.4556","DOIUrl":"https://doi.org/10.29122/ALAMI.V4I2.4556","url":null,"abstract":"Analisa kestabilan lereng di lokasi tambang batubara tanah laut Kalimantan Selatan telah dilakukan analisis tegangan-perpindahan dan Faktor Keamanan (SF) dengan menggunakan program Plaxis-2D. Pada permukaan lereng komponen gravitasi yang bekerja pada tanah cenderung akan menggerakkan tanah ke bawah. Komponen gravitasi ini disebut sebagai gaya penggerak tanah. Lereng mempunyai perkuatan alami yang berasal dari komponen material tanah itu sendiri untuk melawan gaya penggerak tanah, sehingga gerakkan tanah atau kelongsoran tidak terjadi. Ada banyak metode analisis yang bisa digunakan dalam menganilisis kestabilan lereng, salah satunya adalah dengan menggunakan Metode Elemen Hingga (Finite Element Method). Permasalahan kestabilan lereng diselesaikan dengan Metoda Elemen Hingga dengan menggunakan program Plaxis 2D, dimana data analisis diperoleh dari hasil penelitian terdahulu. Data analisis merupakan kombinasi dari berbagai data analisis yaitu jenis tanah dan kemiringan lereng. Hasil analisis terdahulu dengan menggunakan program Slope-W untuk Potongan East (S-W Section), Potongan West (S-W Section), Potongan East HW (N-S Section), Potongan East LW (N-S Section) diperoleh model keruntuhan (collapse) dengan angka keamanan SF < 1.0 dan dibandingkan dengan Analisis dengan menggunakan Plaxis-2D, dimana nilai angka keamanan SF < 1 tidak bisa ditentukan. Berdasarkan analisa Slope-W diperoleh nilai SF < 1.0 (0.114) dan analisis Plaxis diperoleh nilai SF < 1 terjadi pada Potongan East (S-W Section), hal ini menunjukan bahwa Analisa dengan program Slope-W dan program Plaxis 2D mempunyai hasil yang sama dalam menentukan kemungkinan akan terjadi keruntuhan.","PeriodicalId":270402,"journal":{"name":"Jurnal Alami : Jurnal Teknologi Reduksi Risiko Bencana","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117063535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-26DOI: 10.29122/alami.v4i1.4076
Dian Nuraini Melati
There have been a lot of geospatial technologies implemented to support disaster management into a more effective way and achieve disaster risk reduction. One of these technologies is the use Volunteered Geographic Information (VGI). VGI refers to the volunteered activities by anyone to create geographic information. The recent development of VGI is obviously supported by the development technology itself such as social media, Global Positioning System (GPS) with acceptable accuracy. In addition, it is also supported by mostly unlimited cloud-based storage as well as smartphones. In the phenomena of natural disater such as flood, landslide, earth quake, tsunami, and other phenomena, the need of geospatial data and the availability in timely manner becomes important and crucial at all disaster management aspects. The availability of geographic information is very much critical at the time the disaster occurs compared to normal situation. Therefore, VGI is necessary in supporting near real time information. In this case, VGI has a key role in disaster management particularly to reduce disaster risk.
{"title":"Peran Sistem Volunteered Geographic Information (VGI) Sistem dalam Pengurangan Risiko Bencana: Konsep dan Implementasi","authors":"Dian Nuraini Melati","doi":"10.29122/alami.v4i1.4076","DOIUrl":"https://doi.org/10.29122/alami.v4i1.4076","url":null,"abstract":"There have been a lot of geospatial technologies implemented to support disaster management into a more effective way and achieve disaster risk reduction. One of these technologies is the use Volunteered Geographic Information (VGI). VGI refers to the volunteered activities by anyone to create geographic information. The recent development of VGI is obviously supported by the development technology itself such as social media, Global Positioning System (GPS) with acceptable accuracy. In addition, it is also supported by mostly unlimited cloud-based storage as well as smartphones. In the phenomena of natural disater such as flood, landslide, earth quake, tsunami, and other phenomena, the need of geospatial data and the availability in timely manner becomes important and crucial at all disaster management aspects. The availability of geographic information is very much critical at the time the disaster occurs compared to normal situation. Therefore, VGI is necessary in supporting near real time information. In this case, VGI has a key role in disaster management particularly to reduce disaster risk.","PeriodicalId":270402,"journal":{"name":"Jurnal Alami : Jurnal Teknologi Reduksi Risiko Bencana","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124833132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-05-31DOI: 10.29122/ALAMI.V3I1.3368
D. Melati
Tropical rainforest in Indonesia faces critical issue related to deforestation. Human activities which convert forest cover into non-forest cover has been a major issue. In order to sustain the forest resources, monitoring on deforestation and forest cover prediction is necessary to be done. Remotely sensed data, Landsat images, with acquisition in 1996, 2000, and 2005 are used in this study. In this study area, forest cover decreased around 6 % in the period of 1996 - 2005. For the purpose of forest cover modelling, three model (i.e. Stochastic Markov Model, Cellullar Automata Markov (CA_Markov) Model, dan GEOMOD) were tested. Based upon the Kappa index, GEOMOD performed better with the highest Kappa index. Therefore, GEOMOD is recommended to forecast forest cover.
{"title":"Multi Temporal Remotely Sensed Image Modelling For Deforestation Monitoring","authors":"D. Melati","doi":"10.29122/ALAMI.V3I1.3368","DOIUrl":"https://doi.org/10.29122/ALAMI.V3I1.3368","url":null,"abstract":"Tropical rainforest in Indonesia faces critical issue related to deforestation. Human activities which convert forest cover into non-forest cover has been a major issue. In order to sustain the forest resources, monitoring on deforestation and forest cover prediction is necessary to be done. Remotely sensed data, Landsat images, with acquisition in 1996, 2000, and 2005 are used in this study. In this study area, forest cover decreased around 6 % in the period of 1996 - 2005. For the purpose of forest cover modelling, three model (i.e. Stochastic Markov Model, Cellullar Automata Markov (CA_Markov) Model, dan GEOMOD) were tested. Based upon the Kappa index, GEOMOD performed better with the highest Kappa index. Therefore, GEOMOD is recommended to forecast forest cover.","PeriodicalId":270402,"journal":{"name":"Jurnal Alami : Jurnal Teknologi Reduksi Risiko Bencana","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114464004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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