Intensitas Curah Hujan Memicu Tanah Longsor Dangkal Di Sulawesi Selatan

Hasnawir, Hasnawir

doi:10.18330/jwallacea.2012.vol1iss1pp62-73

Cited by 9 publications

(2 citation statements)

References 8 publications

(16 reference statements)

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“…Intensitas hujan yang cukup tinggi dengan durasi yang lama merupakan salah satu faktor penyebab terjadinya erosi dan kelongsoran pada lereng yang kritis. Sebagian besar lereng runtuh/tanah longsor dipicu oleh curah hujan ekstrim (Hasnawir, 2012). Tim peneliti Program Studi Ilmu Lingkungan telah mengidentifikasi bahwa Kawasan DAS Meninting yang termasuk rawan longsor dengan tingkat kerawanan tinggi adalah seluas 4.403,94 Ha, dan seluas 1.065,68 berada di Kecamatan Lingsar.…”

Section: Pendahuluanunclassified

Sosialisasi Area Rawan Longsor Dan Upaya Mitigasinya Di Kecamatan Lingsar Kabupaten Lombok Barat

Virgota,

Farista,

Supardiono

et al. 2023

JGN

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The Meninting Sub-watershed area, West Lombok Regency is one of the areas prone to landslides. This is due to the topographic conditions of the area which are dominated by very steep slopes. Landslides are one of the disasters that often occur, especially in West Lombok Regency. High rainfall intensity with a long duration is one of the factors causing erosion and landslides on critical slopes. This service activity was carried out with the aim of increasing the knowledge and insight of the community around the Meninting watershed, especially in the Lingsar District, regarding the risk of landslides and mitigation actions that can be taken. The target of this service is the Lingsar District Government and surrounding communities affected by the landslide disaster. The result of this service activity is an agreement on a follow-up plan for this activity with the Lingsar District and also the affected communities. This agreement is demonstrated by the willingness of the service target community to utilize data and information disseminated in various disaster mitigation and adaptation actions. Mitigation actions that can be taken include mapping areas prone to landslides, controlling land use, improving the quality of infrastructure, education and training and emergency planning. Handling adaptation to landslide disasters can be done by arranging housing, strengthening infrastructure, utilizing technology, increasing community capacity, and sustainable environmental management.

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Section: Pendahuluanunclassified

Sosialisasi Area Rawan Longsor Dan Upaya Mitigasinya Di Kecamatan Lingsar Kabupaten Lombok Barat

Virgota,

Farista,

Supardiono

et al. 2023

JGN

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“…Air hujan sebagai pemicu longsor telah lama diwaspadai, terutama di Indonesia yang beriklim tropis dan memiliki lapisan tanah lapukan yang tebal. Beberapa penelitian telah menyimpulkan bahwa intensitas curah hujan yang dapat menyebabkan longsor di suatu daerah adalah sekitar 16-22 mm/jam selama 5 jam atau dalam jangka pendek apabila di atas 50 mm/jam [3], [4]. Berdasarkan mekanisme, curah hujan yang tinggi menyebabkan naiknya tekanan air pori sedangkan penyebab lain seperti naiknya tekanan geser pada bidang profil tanah akibat beban tanah yang berat sangat kecil.…”

Section: Pendahuluanunclassified

Analisis Geologi Teknik Longsor di Desa Kuatae, Kecamatan Kota Soe, Nusa Tenggara Timur

Syaeful¹,

Kamajati²,

Rachael³

et al. 2021

EKSPLORIUM

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ABSTRAK Bencana alam longsor di Desa Kuatae, Kecamatan Kota Soe sering terjadi pada musim hujan. Longsor telah menyebabkan rusaknya rumah dan infrastruktur lainnya. Penelitian longsor dilakukan dengan pemetaan geologi teknik, pengeboran geologi teknik, uji laboratorium, analisis kestabilan lereng, dan identifikasi opsi penanggulangan. Berdasarkan hasil pemetaan, longsor terjadi dalam dua model, yaitu blok batugamping terumbu yang mengalami longsor translasi di atas napal dan batulempung serta longsor rotasi pada napal yang dikontrol oleh lapisan dasar yang kontak dengan batulempung. Hasil uji penetrasi standar pada batulempung dan napal menunjukkan nilai konsistensi yang sangat tinggi. Hasil analisis kestabilan lereng menunjukkan lereng dalam keadaan stabil tapi ternyata longsor masih terjadi di beberapa tempat pada area napal dan batulempung. Hal tersebut mengindikasikan bahwa material batuan mengalami degradasi kuat geser pada beberapa kondisi. Penelitian lebih lanjut terkait degradasi material batuan, seperti sifat tahan lekang dan lempung mengembang sangat penting untuk menentukan opsi penanggulangan yang paling tepat dilakukan pada kasus longsor di Desa Kuatae.ABSTRACT Landslides in Kuatae Village, Kota Soe District often occur during the rainy season. The slope failures cause damage to houses and other infrastructures. The research of slope failure has been carried out by using engineering geological mapping, engineering geological drilling, laboratory test, slope stability analysis, and identification of countermeasure options. Based on the mapping results, slope failures occur in two models, the first one was coral limestone blocks translation failure over marl and claystone, and the second one was rotation failure on marl that controlled by the base layer which contact with claystone. The result of the standard penetration test on claystone and marl showed a very high consistency value. The slope stability analysis had shown the slope is in a stable state, but slope failure occurred in several places on the marl and claystone area. Those indicated that the material had encounter shear strength degradation under several circumstances. Further investigation on the degradation of the rock material, such as slake durability and swelling clay are very important to determine the most appropriate countermeasure option to be applied in the landslide case of Kuatae Village.

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Simple house foundation models in potential landslide area (case study: Bojong Koneng Village, Babakan Madang Sub-District, Bogor District)

Hasanah,

Asokawati,

Elvirandra

et al. 2023

E3S Web Conf.

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Bogor Regency is a land area that has varied geomorphological conditions, mostly in the form of plateaus, hills and mountains with constituent rocks dominated by volcanic eruptions. This study was conducted to determine the topographic and geotechnical conditions at the Bojong Koneng location to determine the prediction of landslide areas, obtain the foundation planning criteria for simple houses in vulnerable areas, and design a foundation model suitable for simple houses in erosion-prone areas based on field survey in Curug Village, Bojong Koneng Village, Babakan Madang, Bogor Regency, West Java With a slope ranging from 10°-25° sloping to the north which is a soft black clay layer with the slope of the layer in the direction of the slope. In the existing slope model without Strauss piles, the safe slope stability factor (SF) is only around 1.02, so the slope is not fully declared safe. The installation of Strauss piles fondation theoretically helpbaas to improve slope stability for hard soil conditions at a relatively shallow depth from the ground surface or in this study at a depth of 5.20 meters. The SF value at the tip of the strauss pile is only attached to the hard soil layer, almost approaching the condition of the strauss pile penetrating 1.00 m deep hard soil. However, when viewed from the sliding plane of the Strauss pile fondation tip which is only attached to the hard soil layer, it behaves like a pile so this needs to be avoided in planning.

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Intensitas Curah Hujan Memicu Tanah Longsor Dangkal Di Sulawesi Selatan

Abstract: ABSTRACT

Cited by 9 publications

References 8 publications

Sosialisasi Area Rawan Longsor Dan Upaya Mitigasinya Di Kecamatan Lingsar Kabupaten Lombok Barat

Sosialisasi Area Rawan Longsor Dan Upaya Mitigasinya Di Kecamatan Lingsar Kabupaten Lombok Barat

Analisis Geologi Teknik Longsor di Desa Kuatae, Kecamatan Kota Soe, Nusa Tenggara Timur

Simple house foundation models in potential landslide area (case study: Bojong Koneng Village, Babakan Madang Sub-District, Bogor District)

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