Article Per Year (5 Year)
p-Index From 2021 - 2026
0
P-Index
This Author published in this journals
All Journal Forum Geografi GERVASI: Jurnal Pengabdian kepada Masyarakat
Imam Hardjono
Universitas Muhammadiyah Surakarta
Earth & Planetary Sciences Education Languange, Linguistic, Communication & Media Mathematics Social Sciences Other

Published : 15 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 13 Documents
Search
Journal : Forum Geografi

 1   2 
The Utilization of Black – White Panchromatic Aerial Photograph for Mass Movement Study in Karang Kobar Areas, Banjarnegara, Centra Java Imam Hardjono; Karmono Mangoensoekardjo; S Sutikno
Forum Geografi Vol 11, No 2 (1997)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v11i2.489

Abstract

This is the result of applied remote sensing  for geological study the mass wasting in Karangkobar, the district of Banjarnegara, Central Java. The study on the mass wasting use the remote sensing method, by interpreting the blackwhite panhromatic aerial photographs, on the scale 1 : 50,000. The study is aimed at 1) revealing the capacity of the aerial photograph in supporting the study the mass wasting that an be identified by the aerial photographs; 2) to find out the influence of the physical environment and land-use on the mass wasting processes. The study in performed by using the visual interpretation method of the scale 1 : 50,000 black-white panchromati aerial photograph taken in 1994, using mirror stereoscope. The outcome of the aerial photograph interpretation is varis the quality of data and information. The data of interpretation of aerial photograph and the varis outcome in the spot are further tested in terms of its accuracy, particularly in its reltion with the aerial photograph interpretation. The technique of data analysis of the physical environment and the mass wasting is descriptive – comparative. The result of the study shows that the 1 : 50,000 black-white panchromatic aerial photograph can be used to identify and study both the mass wasting and influence of the physical environment on the mass wasting processes. The degree of identifying the mass wasting based on the aerial photograph interpretation is 75%. Compared to the previous studies, the present study hows that the mass wasting can be identified more easily by means of the 1 : 50,000 black – white panchromatic aerial photograph. Identifying the distribution of mass wasting are: a) the geological element (rock, geological structure, and stratigraphy); b) geomorphological elements (landform and the forming processes); the water condition (surface water and groundwater); and landuse (type and distribution). White marl – claystone type is the physical environmentsal element that has the most type is the physical environmentsal element that has the most dominant influence on the occuring of mass wasting in Karangkobar area.
The Hierarchy of Earthquake and Tsunami: The Cases of Aceh, Nias, Bantul, Pangandaran, and Sunda Staits Imam Hardjono
Forum Geografi Vol 20, No 2 (2006): December 2006
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v20i2.1811

Abstract

Indonesia is vulnerable to earthquake and tsunami disaster because it is located in the fracture zone between the continental and oceanic lithospheres, running from the west of Sumatera, though the south of Java, NTB, Sulawesi to Papua. In the theoretical framework of Indonesian tectonic lithosphere, this zone is known as Sula-spuur. The frequent earthquake and tsunamis in Indonesia justify the theory that the earth will always seeks for dynamic self-balance through oceanic basin as well as continental basement expansions. Based on the tectonic lithosphere analysis, the anatomy of earthquake and tsunami disaster in Java falls into two different paths. The first is northwestward path in Western Java following the Semangko fault trend, from Pangandaran/Cilacap through Kadipaten, Subang to Jakarta. The other is the northeastward path in Central Java and East Java running from Bantul through Prambanan, Klaten to Rembang. The two hats correspond to the seventeen-kilometre-deep-underground fracture involving basement rocks resulted from the area shifting evolution during the limestone age prior to the existence of limestone in Indonesia. Based on the evidences found in Bantul- Klaten earthquake, the question necessary to raise is whether similar earthquake may happen in Jakarta.
Proses Sedimentasi Oleh Arus Turbid pada Formasi Halang, di Daerah Ciawigebang, Kabupaten Kuningan, Jawa Barat Imam Hardjono
Forum Geografi Vol 8, No 2 (1994): December 1994
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v8i2.4824

Abstract

Sedimentologi adalah cabang dari ilmu geologi yang khusus yang mempelajan batuan sedimen, sifat-sifat fisisnya, tempatnya dalam kerangka geologi, dan proses pembentukannya, terutama cara dan lingkungan pengendapannya. Salah satu dari mekanisme sedimentasi, adalah sedimentasi sistem arus turbid (arus pekat), yaitu material sedimen yang beronggok pada suatu lereng samudra, kemudian secara tiba-tiba terkena hentakan dan meluncur dengan kecepatan tinggi bercampur air berupa suatu aliran padat ("density current"). Pada mekanisme ini, partikel-partikel sedimen bergerak tanpa benturan/seretan air, tetapi "energi potensial" dirubah menjadi "energi kinetis". Pengendapan terjadi setelah energi kinetis habis, misalnya pada tempat yang datar atau pada lekukan-lekukan. Arus turbid ini terjadi di laut dan merupakan mekanisme penting dalam mentrasfer material sedimen dari daerah bathyal dan abisal ke daerah hadal. Formasi Halang, yang terdiri dari perselingan antara lapisan-lapisan batu pasir dan batu lempung, berumur Miosen Awal, Miosen Tengah, dan diketemukan di daerah Ciawigebang, Kabupaien Kuningan, Jawa Barat, merupakan salah satu contoh endapan hasil sedimentasi oleh arus turbid.
Co-Authors Karmono Mangoensoekardjo Karmono Mangoensoekardjo, Karmono Munawar Cholil Priyono Priyono Priyono S Sutikno S Sutikno, S