Mapping Faults Distribution Based on Dem Data for Regional Spatial Plan Assessment of Sabang Municipality, Indonesia

Nanda, Muhammad

doi:10.21660/2020.76.90787

Cited by 6 publications

(13 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Kronologi pembentukan kelurusan topografi diklasifikasikan dengan formula Sastratenaya [7]. Densitas kelurusan yang tinggi disebabkan oleh deformasi tektonik [8]. Bentuk yang pipih paralel serta memiliki orientasi di antara topografi tinggi dan rendah menunjukkan daerah potensi struktur [9].…”

Section: Pendahuluanunclassified

Identifikasi Deformasi Tektonik Aktif Berdasarkan Ekstraksi Kelurusan Morfologi dan Seismisitas di Sukabumi, Jawa Barat

Mahbub

Ragil

2021

EKSPLORIUM

View full text Add to dashboard Cite

ABSTRAK Pusat gempa bumi di Sukabumi telah membentuk deformasi bawah permukaan dan kini terekam juga di permukaan. Hal itu termanifestasi melalui geomorfologi kelurusan gawir dan sungai. Ekstraksi kelurusan-kelurusan akibat deformasi geologi tersebut dapat digunakan untuk mengidentifikasi deformasi tektonik aktifnya. Tujuan penelitian ini adalah untuk mengetahui hubungan antara struktur sesar aktif dengan arah dominan kelurusan di daerah penelitian. Metode Edge Enhancing Filtering digunakan untuk menginterpretasi kelurusan secara manual dan semi-otomatis. Data geospasial kelurusan diekstraksi menggunakan formula Sastratenaya untuk mengetahui kronologi kelurusan yang terbentuk. Hasil analisis menggunakan formula Sastratenaya menunjukkan kelurusan-kelurusan yang terekam melalui olah data peta DEM, yaitu segmen 1 berarah N315°E dan segmen 2 berarah N10°E yang diinterpretasikan sebagai hasil reaktivasi sesar. Hal ini dapat diinterpretasikan bahwa Sesar Cimandiri, yang merupakan sesar aktif dengan pergerakan oblique-slip sinistral N88°E/85° rake 33°, memengaruhi arah dua segmen kelurusan di daerah penelitian wilayah Sukabumi, Jawa Barat.ABSTRACT The epicenter of the earthquake in Sukabumi has formed subsurface deformation which is now also recorded on the surface area. This is manifested through the geomorphology of the scarp and river lineaments. Extraction of lineaments produced by geological deformation can be used to identify its active tectonic deformation. The research objective is to determine the relationship between the active fault structure and the dominant direction of lineaments in the study area. The Edge Enhancing Filtering method is used to interpret lineaments manually and semi-automatically. The lineament geospatial data was extracted using the Sastratenaya formula to determine the chronology of the lineaments formed. The Sastratenaya formula results showed the lineaments recorded by DEM images data processing, the first segment direction is N315°E and the second is N10°E, both are interpreted as the result of fault reactivation. It can be interpreted that the Cimandiri Fault, which is an active fault that has an N88°E/85° rake 33° sinistral oblique-slip fault movement, affects the lineaments direction of two segments in the research area of Sukabumi, West Java.

show abstract

Section: Pendahuluanunclassified

Identifikasi Deformasi Tektonik Aktif Berdasarkan Ekstraksi Kelurusan Morfologi dan Seismisitas di Sukabumi, Jawa Barat

Mahbub

Ragil

2021

EKSPLORIUM

View full text Add to dashboard Cite

show abstract

“…Oleh karena itu pemetaan distribusi patahan di Pulau Weh sangat mendesak untuk dilakukan. Sejauh ini penelitian di lepas pantai utara Aceh dan Pulau Weh masih minim dan parsial, seperti tektonik landform dan aktivitas paleo-seismik [17], pemetaan patahan berdasarkan unit geologi [6], kajian geometri dan kinematika patahan [5], Aceh [4] dan distribusi patahan berdasarkan kajian geomorfologi [18]. Bagaimanapun, kajian seperti pemetaan patahan berdasarkan kajian geomorfologi hanya berdasarkan kondisi atas permukaan saja, kajiankajian geofisika yang mengidentifikasi berdasarkan struktur bawah permukaan perlu dilakukan untuk membandingkan hasil temuan.…”

Section: Pendahuluanunclassified

“…Hasil interpretasi didapatkan sebaran patahan di Pulau Weh sekitar 13 patahan. Secara umum, hasil temuan distribusi patahan pada penelitian ini mengikuti pola sebaran patahan pada kajian terdahulu berdasarkan geomorfologi [18]. Namun, beberapa patahan yang ditampilkan pada kajian geomorfologi tersebut tidak ditemukan pada interpretasi hasil pada penelitian ini.…”

Section: Kesimpulanunclassified

“…Hal ini menunjukkan kesesuaian dengan arah patahan GSF di Pulau Sumatra [1]. Beberapa juga mengemukakan bahwa Pulau Weh merupakan area perpanjangan dari GSF di lepas pantai utara Aceh (misalnya: [17], [18], [32], [33]).…”

Section: Kesimpulanunclassified

“…(a) Distribusi intepretasi medan magnetic total berdasarkan tranformasi analytic signal. Garis hitam solid adalah interpretasi patahan berdasarkan kajian geomorfologi[18]. Garis hitam putusputus adalah interpretasi patahan berdasarkan signal analytic (b) profil penampang A-A'.…”

unclassified

See 2 more Smart Citations

Delineasi Patahan di Pulau Weh sebagai Perpanjangan The Great Sumatran Fault (GSF) Berdasarkan Data Metode Geomagnetik

et al. 2021

Self Cite

View full text Add to dashboard Cite

This research has mapped the active fault of the Seulimeum segment part of the extension of The Great Sumatran Fault (GSF) in the northern as preparation for disaster mitigation. Nevertheless, seismic activity significantly on the Seulimeum segment still has not happened yet. This situation has the potential for a hugely destructive earthquake with a magnitude reaching ~7.4 and also will threaten the Weh island at the northernmost end of the Seulimeum segment even though the Weh island is a settlement, integrated economy area, tourism, trade area, and freeport zone. This study used geophysical methods, i.e., geomagnetic methods, for subsurface investigation. Each distance of 500m data was measured throughout the island using the Proton Precession Magnetometer (PPM) GEM 19 to get 204 total magnetic field data. The correction process (e.g., diurnal and IGRF) is done to get the total intensity of magnetic anomalies. Based on the calculation of residual data and analytical signals from the intensity of total magnetic anomalies, Interpretation found 13 fault distributions around the island with orientation in the northwest-southeast. This result has in agreement with the previous studies. However, this research has did not yet got information about geometry and fault depth. Comprehensive research is needed to complete it.

show abstract

Community of juvenile hard corals (Scleractinia) in different geomorphological type and reef benthic communities

Abrar

Hadi

Handayani

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Juvenile corals are an important stage in the life history and demographics of coral populations in nature however, their survival is influenced by the physical environment and benthic coral reef communities. The study of juvenile coral communities with a maximum size of 10 cm on the reefs of Pulau Weh, Sabang, Aceh was conducted to observe juvenile coral communities and determine their relationship with geomorphological types and benthic reefs communities. A total of 9 sites with 72 sampling squares were distributed in different geomorphological; tectonic type with hard substrates of lava and limestone, volcanic type with predominantly sand substrate, and dead coral with algae with the presence of hot springs in the vicinity. In total, we found 25 genera of juvenile corals from 12 families, and the abundance reached 449 colonies with an average of 37.41 colonies per site. The mean density was 6.66 ± 5.99 colonies/m2 (±SD) and varied significantly between sites (p=4.878-7; <0.05), which was dominated by the genera Porites, Pavona, Acropora, Montipora, and Favia. Live coral cover (HC), dead coral algae (DCA), and hard rock substrate (RK) did not affect, however rubble coral (R) was significantly affected (p=1.9-2; <0.05). Geomorphological conditions and benthic reef cover did not show a significant effect (p = 0.48; < 0.05), although juvenile corals were very common and better in the tectonic type than the volcanic type. The survival of juvenile corals was low, where the smaller size was significantly high compared to the larger size (p=4.5-5; <0.05). Our study provides up-to-date information and data on juvenile coral communities based on geomorphological conditions and local benthic reef communities.

show abstract

Mapping Faults Distribution Based on Dem Data for Regional Spatial Plan Assessment of Sabang Municipality, Indonesia

Cited by 6 publications

References 14 publications

Identifikasi Deformasi Tektonik Aktif Berdasarkan Ekstraksi Kelurusan Morfologi dan Seismisitas di Sukabumi, Jawa Barat

Identifikasi Deformasi Tektonik Aktif Berdasarkan Ekstraksi Kelurusan Morfologi dan Seismisitas di Sukabumi, Jawa Barat

Delineasi Patahan di Pulau Weh sebagai Perpanjangan The Great Sumatran Fault (GSF) Berdasarkan Data Metode Geomagnetik

Community of juvenile hard corals (Scleractinia) in different geomorphological type and reef benthic communities

Contact Info

Product

Resources

About