Landslide Damage from Extreme Rainstorm Geological Accumulation Layers within Plain River Basins

Yang, Jun

doi:10.2112/si82-001.1

Cited by 4 publications

(3 citation statements)

References 28 publications

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“…During the occurrence of rain, rain water will enter into the rock bed in the soil then it can change the structure of the slope and soil surface which will increase the pressure of rainwater in the soil. The occurrence of land and rock landslides could change the formation of land slopes which will have an impact on the loss of roads or other natural formations such as rivers (Yang, 2018).…”

Section: Resultsmentioning

confidence: 99%

Analysis of the determinants and typology of hydrometeorological disaster in Sukajaya Subdistrict, Bogor Regency, West Java, Indonesia

Istiadi

Priatna

2021

InJAST

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The objective of this research is to determine the factors as a typology of hydrometeorological disasters. The research method employed is post-disaster survey activities through hypothetical descriptions from October to December 2020. The analysis technique uses factor analysis on five variables, namely runoff, infiltration, slope, land cover, and infrastructure. The data retrieval obtained nine areas of landslide disaster points along 20 kilometers from Kiarapandak Village to Cisangku Village, Sukajaya Subdistrict, Bogor Regency, one of which were the areas affected by landslides in January 2020. From the factorial analysis results, it was found that the five variables above were suitable as a factor for determining disaster based on correlation values (r), that includes Factor 1 which is the variable of land slope (0.855) and the infrastructure variable (0.872). Factor 2 is water infiltration (0.928), water runoff (0.269), and land cover (0.717). In conclusion, the typology of hydrometeorological disasters is distinguished based on two determinants, firstly the physical construction of land, slopes, as well as infrastructure of road and river. Secondly, factors of water flow, water infiltration, runoff, and land cover.Tujuan penelitian adalah membuat determinasi faktor-faktor sebagai tipologi kebencanaan hidrometeorologi. Metode penelitian melalui kegiatan survey pasca bencana melalui deskripsi hipotetik pada bulan Oktober-Desember 2020. Teknik analisis menggunakan analisis faktor pada 5 (lima) variabel yaitu limpasan, resapan, kemiringan, tutupan lahan, dan infrastruktur. Pengambilan data mendapatkan 9 (sembilan) daerah titik bencana longsor sepanjang 20 kilometer dari Desa Kiarapandak sampai Desa Cisangku, Kecamatan Sukajaya Kabupaten Bogor, yang merupakan wilayah terkena bencana longsor pada bulan Januari 2020. Dari hasil analisis faktorial diperoleh bahwa 5 (lima) variabel di atas layak dijadikan faktor determinasi kebencanaan berdasarkan nilai korelasi (r), meliputi Faktor 1 adalah variabel kemiringan lahan (0,855) dan variabel infratruktur (0,872). Faktor 2 adalah resapan air (0,928), limpasan air (0,269), dan tutupan lahan (0,717). Kesimpulan, tipologi bencana hidrometeorologi dibedakan berdasarkan dua faktor determinasi yaitu pertama faktor konstruksi fisik lahan, kemiringan dan infratruktur jalan dan sungai, dan faktor aliran air, resapan air, limpasan, dan tutupan lahan.

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Section: Resultsmentioning

confidence: 99%

Analysis of the determinants and typology of hydrometeorological disaster in Sukajaya Subdistrict, Bogor Regency, West Java, Indonesia

Istiadi

Priatna

2021

InJAST

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“…They possess a loose structure, uneven grain distribution, and large pores (He et al, 2020;Yang et al, 2023). Consequently, landslides triggered by accumulation bodies exhibit high frequency and high risk (Dahal et al, 2008;Yang, 2018). The loose structure of accumulation bodies contributes to their high permeability, making them prone to instability and failure under prolonged and intense rainfall conditions (Gan and Zhang, 2020;Zhang et al, 2020;Yang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the failure of loose accumulation landslides under rainfall conditions

Sun,

Zhao,

Qin

et al. 2023

Front. Earth Sci.

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Rainfall plays a pivotal role in triggering the failure of loose accumulation landslides. To understand their stability, it is essential to explore the deformation, failure patterns, fine particle migration, and infiltration behavior of such landslides under rainy conditions. Employing the Yuqiupo landslide as a case study, this research dissects the fundamental attributes of the Yuqiupo landslide through geological examinations. Moreover, the study replicates the failure of the loose accumulation landslide via artificial rainfall experiments. By employing acquired data on soil volumetric water content and matrix suction from these experiments and observing measurable shifts in the landslide’s failure progression and rainfall circumstances, the water-hydraulic conditions of the accumulation landslide are meticulously dissected. The conducted experiments disclose that the failure of the loose accumulation landslide emanates from the combined effects of preferential flow and matrix flow within unsaturated conditions. Rainfall triggers an elevation in soil moisture content and a concurrent decrease in matrix suction, compromising the slope’s stability and ultimately causing the landslide. Furthermore, our research includes a quantitative analysis of changes in particle size distribution before and after the landslide’s failure. This endeavor underscores the influence of distinct failure modes on the migration of fine particles, with these migration patterns distinctly shaped by prevailing rainfall conditions.

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“…Landslides are a form of erosion where the transportation or movement of the soil mass occurs at a time in a relatively large volume (Suripin, 2002;Istiadi & Priatna, 2021). Wong et al (2017) and Yang (2018) stated that the occurrence of landslides is related to various factors such as precipitation, geology, distance from the fault, vegetation, and topography.…”

Section: Introductionmentioning

confidence: 99%

Threat of landslides hazard at the core zone of Cultural Conservation Strategic Area of Gunung Padang megalithic site, in Cianjur District

Dewi

Fauzi²,

Syahbandar³

2022

InJAST

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The megalithic site of Gunung Padang is an area prone to landslides. Based on the Regulation of Cianjur District No. 17 of 2012, this site area is designated as a Cultural Conservation Strategic Area. This study aims to analyze the potential for landslide hazards in the Gunung Padang Megalithic Site area. The research method is quantitative. Primary data was collected through observation and interview experts; secondary data was collected through literature studies and agency surveys. The analytical method used is quantitative through analysis of Geographic Information Systems (GIS), with overlay and weighting techniques. The results showed three landslide susceptibility classifications: very high, medium, and very low. A very high level of landslide hazard is found in the area around the site, which is currently exposed, amounting to 9.03% of the core zone of the Cultural Conservation Strategic Area.Situs megalitikum Gunung Padang merupakan kawasan rawan longsor. Berdasarkan Peraturan Bupati Cianjur No. 17 Tahun 2012, kawasan situs ini ditetapkan sebagai Kawasan Strategis Cagar Budaya. Penelitian ini bertujuan untuk menganalisis potensi bahaya longsor di kawasan Situs Megalitikum Gunung Padang. Metode penelitian adalah kuantitatif. Data primer dikumpulkan melalui observasi dan wawancara ahli, data sekunder dikumpulkan melalui studi literatur dan survei keagenan. Metode analisis yang digunakan adalah kuantitatif melalui analisis Sistem Informasi Geografis (SIG), dengan teknik overlay dan pembobotan. Hasil penelitian menunjukkan tiga klasifikasi kerawanan longsor yaitu sangat tinggi, sedang dan sangat sangat rendah. Tingkat kerawanan longsor yang sangat tinggi terdapat di wilayah sekitar tapak yang saat ini terpapar, yaitu sebesar 9,03% dari zona inti kawasan strategis cagar budaya.

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Landslide Damage from Extreme Rainstorm Geological Accumulation Layers within Plain River Basins

Cited by 4 publications

References 28 publications

Analysis of the determinants and typology of hydrometeorological disaster in Sukajaya Subdistrict, Bogor Regency, West Java, Indonesia

Analysis of the determinants and typology of hydrometeorological disaster in Sukajaya Subdistrict, Bogor Regency, West Java, Indonesia

Experimental study on the failure of loose accumulation landslides under rainfall conditions

Threat of landslides hazard at the core zone of Cultural Conservation Strategic Area of Gunung Padang megalithic site, in Cianjur District

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