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Journal : Forum Geografi

Tinjauan Kerentanan, Risiko dan Zonasi Rawan Bahaya Rockfall di Kulonprogo, Yogyakarta Dyah R. Hizbaron; Danang Sri Hadmoko; Samodra Wibawa; Syarifah Aini Dalimunthe; Junun Sartohadi
Forum Geografi Vol 24, No 2 (2010): December 2010
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v24i2.5021

Abstract

This research aims at identification of spatial plan zonation in rock fall prone areas. Research method applies hazard, vulnerability and risk analysis as an input for spatial modeling using Multi Criteria Evaluation (MCE). Research reveals that in Girimulyo is susceptible towards rock fall. In the last decades, there were 16 occurrences of rock fall that impacted to physical damages. Fortunately, such disaster did not cause any harm to human life. Therefore, research argue that physical vulnerability analysis can be analyzed, while social vulnerability cannot be analyzed further, since it had less data support. According to the research, there are more than 48 housing units located in hazard zone. Hence, local government should initiate structural mitigation to avoid further loss. Research also reveals that areas with high susceptibility will not directly consider as high risk zone, unless it has high vulnerability index. Example: areas along escarpment, where it has high susceptibility, but it has no element at risk in the area. Thereby, research tries to present zonation for prone hazard areas, using risk index. The result is quite representative, since possible areas to be developed is anywhere alongside road network. Indication of the area is produced from the multi criteria analysis. Multi criteria analysis is an essential method to combine spatial data and its attribute. Using such method requires more data input and expertise in justifying indicator to be selected.
A Review of Society’s Behaviour Towards Land Management of Susceptible Area to Landslide in Pekuncen, Banyumas Suwarno Suwarno; Junun Sartohadi; Sunarto Sunarto; Djarot Sadharto
Forum Geografi Vol 30, No 1 (2016): July 2016
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v30i1.1704

Abstract

Land management is a manifestation of the society’s behaviour in utilizing the land. The objective of the research was to examine the effect of education level, income, land tenure, knowledge, and information input on the society’s behaviour in managing the area susceptible to landslide in Pekuncen sub-district, Banyumas district.   The method of this research was survey by employing questionnaire to collect field data. The variable comprised of the data of education level, income, land tenure, knowledge, and information input.. Stratified random sampling was applied to determine the samples of the research. The area susceptibility class  was considered as the strata in which each stratum consisted of 40 family heads as the respondents. The data analysis applied statistical test of multi-regression. Research area was divided into three classes of landslide susceptibility comprising of low, medium, and high class. Education level, income, land tenure, knowledge, and information input significantly influenced the society’s behaviour dealing with land management (determination co-efficiency (R²) was 69.9 %). It occurred in the area of medium susceptibility class. Information input (regression coefficient/(beta) = 0.817) was the most influential predictor of society’s behaviour in land management located in the low susceptibility class. From this research, it was expected that the description about the factors that influenced the society’s behaviour in managing the landslide-prone area would be a valuable reference in preventing landslide in those areas.
Evaluasi Potensi Degradasi Lahan dengan Menggunakan Analisa Kemampuan Lahan dan Tekanan Penduduk terhadap Lahan Pertanian di Kecamatan Kokap Kabupaten Kulon Progo Junun Sartohadi
Forum Geografi Vol 22, No 1 (2008): July 2008
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v22i1.4921

Abstract

Kokap sub district is located in Kulonprogo District, Yogyakarta Province. It has some problems of landslides and misuse of land. The research was proposed to determine the regions having potential of land degradation based on the land capability and population pressure analysis. This research was carried out using field survey. The field survey was based on landform unit as area sampling unit. The (Land Classification and Land Use Planning) LCLP software was applied for land capability classification. The Soemarwoto method was applied for the evaluation of population pressure on the agriculture land. The results of this research were: (1) land capability in the study area was varies from class II – class VII with limitation factors of slope, soil erodibility, soil texture, soil permeability and soil effective depth, (2) the whole study area fell into high population pressure class (that means it had exceed of its land capability), (3) most of the study area (51.9%) had been classified into high potential of land degradation.
Tipologi Pedogeomorfik Longsorlahan di Pegunungan Menoreh Kabupaten Kulonprogo Daerah Istimewa Yogyakarta Kuswaji Dwi Priyono; S Sunarto; Junun Sartohadi; S Sudibyakto
Forum Geografi Vol 25, No 1 (2011): July 2011
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v25i1.5035

Abstract

Pedogeomorphology tipology was applied in this research to determine the occurrence of landslide in the Menoreh Mountains, Kulonprogo District, Yogyakarta Special Region. The research aimed to know (1) soil characteristics where landslide events occurred in the research area, (2) characteristic of landslide prone landform in the research area, and (3) typology pedogeomorphic of landslide events in the research area. Pedogeomorphologic approach was represented through the steps of mapping the occurrence of landslides and landform, soil profile pedogenitic analysis and geomorphologic analysis at the point of occurrence of landslide. The results show that landforms characteristic on the occurrence of landslide with slope 16-75%, elevation 210-807 m dpal, weathered zone depth 25-80 cm, and the position of contacts on the opposite slope is flat and parallel. The soil characteristics on the occurrences of landslides have a 20-186 cm soil depts with the content 21,50-95,00% of caolinite clay, and clay content ratio between horion A dan B 0,22-0,91. Pedogeomorphic typology landslides prone classified into 3 levels, namely: low, moderate, and high level of vulnerability. The low level are indicated by the thickness of soil depth 0,60, slope 25%, elevation 120 cm, caolinite clay content 70%, clay content ratio of A and B horizon 0,40, slope 60%, elevation 600 m dpal, the depth of weathered zone 60 cm, and the position of field contact against the slopes is parallel.
Estimation of Soil Moisture Regime Based on Analysis of Rainfall, Air Temperature, and Landform - Soil (Case Study on River Regional Unit (SWS) Pemali - Comal) Junun Sartohadi; Junita Saragih
Forum Geografi Vol 18, No 2 (2004)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v18i2.617

Abstract

The objectives of this research were 1) to determine soil moisture regime based on rainfall and temperature data; 2) to make a correction of the first objective based on soil moisture surplus and deficit calulation; 3) to study the pattern of soil moisture regime distribution in the research area. The field sampling tehniques applied in this research was stratified proposed sampling. Landform unit was applied as strata. Soil depth and texture were considered during field soil sampling within the landform unit. Rainfall and air temperature data were analyzed using Newball Simulation Model (NSM) to determine a tentative soil moisture regime. The tentative soil moisture regime was corrected using calculation soil moisture regime of soil moisture surplus and deficit. The soil moisture surplus and deficit was calculated based on soil depth, soil texture, rainfall, and temperature data. The result of this research were 1) soil moisture regime estimated using NSM ranged from ustic to udic; 2) soil moisture regime corrected using surplus and/ or defiit alulation of soil moisture ranged from xeric to udic; 3) the pattern of soil moisture regime distribution in the reaserch area was not only controlled by the pattern of rainfall – air temperature distribution but it was also controlled by the pattern of soil – landform distribution. Under the some amount of annual rainfall, shallow and coarse texture soils have drier soil moisture regime than deep and fine texture soils.
Co-Authors . Awaluddin, . Adhera Sukmawijaya Adhitama, Adib Prima Aditya Saputra Afid Nurkholis Ahmad Priyo Sambodo Ahmad Syukron Prasaja Ajun Prayitno Akbar, Aji Ali Amir Noviyanto Anastasia Neni Candra Purnamasari Andi Sungkowo Andi Syahputra Andri Kurniawan Anggri Setiawan Anggri Setiawan Ardila Yananto Awaluddin Azwar Maas Christanto, Nugroho Christanto, Nugroho Christopher Gomez Christopher Gomez Christopher Gomez, Christopher D Daryono Danang Sri Hadmoko Danang Sri Hadmoko Danang Sri Hadmoko Danang Sri Hadmoko Daryono, D Dema Azmir Hatta Didik Indradewa Didik Indradewa Djarot Sadharto Djarot Sadharto, Djarot Djati Mardiatno Djati Mardiatno Djati Mardiatno Dyah R. Hizbaron Dyah Rahmawati Hizbaron Eddy Hartantyo Edhi Martono Edhi Martono Ekha Yogafanny Erika Galih Ayu Priyawati Ernitha Panjaitan Erny Wibawanti Estuning Tyas Wulan Mei Fathia Lutfiananda Ferad Puturuhu Franck Lavigne Franck Lavigne, Franck Harlin Jennie Pulungan, Nur Ainun Hartanti Hartanti Hero Marhaento Hero Marhaento, Hero Hizbaron, Dyah R. Hizbaron, Dyah R. Ihsan, Haikal Muhammad Jetten, Victor G Junita Saragih Junita Saragih, Junita Khairisa, Noor Husna Kuswaji Dwi Priyono La Ode Hadini Lies Rahayu M Pramono Hadi, M Pramono M. Anggri Setiawan Makruf Nurudin Maola Maqdan Maria E. I. Shrestha Marshanda Sasmita Putri Masruroh, Heni Maulana, Edwin Meiarti, Rini Mohammad Kholid Ridwan Mohammad Pramono Hadi Mr. Suwarno, Mr. Mudrajat Kuncoro Muhammad Anggri Setiawan Muhammad Anggri Setiawan Muhammad Anggri Setiawan Muhammad Anggri Setyawan Nehren, Udo Ngadisih Ngadisih Ngadisih Ngadisih Nisaa', Ratri Ma'rifatun Nugroho Crhristanto Nurul Hidayati Nurwihastuti, Dwi Wahyuni Pertiwi, Rianita Praharto, YB Pramasti Dyah Nhindyasari Projo Danoedoro Pulungan, Nur Ainun Harlin Jennie Punuf, Defritus Aldrin purnamasari, Anastasia Puspita Indra Wardhani R. Rijanta Ratri Ma'rifatun Nisaa' Retnadi Heru Jatmiko Rimawan Pradiptyo Rina Purwaningsih Rina Purwaningsih, Rina Rini Meiarti Rosalina Kumalawati S Sudibyakto S Sunarto Saidah Istiqomah Samodra Wibawa Samodra Wibawa Samodra, Guruh Santika Purwitaningsih Seftiawan Samsu Rijal Seftiawan Samsu Rijal Setiawan, Anggri Setiawan, M Anggri Setiawan, M. Anggri Setiawan, M.Anggri Setiawan, Muhammad Anggri Setiawan, Muhammad Anggri Seto, Toshikazu Setyawan, Muhammad Anggri Shrestha, Dhruba Phika Shrestha, Druba Phika Shrestha, Maria E. I. Su Ritohardoyo Sudibyakto, S Sunarto Sunarto Sunarto Sunarto Sunarto Sunarto Sunarto, S Surya Sabda Nugraha Suryanto Susatio, Raja Suwarno Suwarno Syarifah Aini Dalimunthe Syarifah Aini Dalimunthe, Syarifah Aini Tjut Sugandawaty Djohan Toshikazu Seto Trida Ridho Fariz Tris Sugiarto Tris Sugiarto Victor Jetten, Victor Wahyu Wardhana Wahyu Wilopo Wahyudi Wahyudi Waode Asryanti Wida Yeni Astuti, Yeni Yoga Darmajati