Karakteristik Tanah Longsor di Daerah Aliran Sungai Tangka

Abstract

Landslides occur as a result of ground movement on steep slopes, and the high humidity (moisture), and the sparse vegetation (open land). The Local conditions is an interrelated components. The process of landslides can be explained that the water soak into the soil will add weight to the ground. If the water penetrates the soil acts as a watertight sliding plane, the ground becomes slippery and soil weathering on it will move to follow the slope. This study aims to determine the type of landslide, landslide characteristics and landslides causing factors. This research was conducted in September 2015 in Watershed Tangka. The study consisted of three stages, namely the determination of the coordinates of the location of the landslide, landslide determining the location of the sample, the determination of the type of landslide, slope measurements, measurements of the dimensions of landslide and infiltration. Research results obtained are the coordinates of the location of as many as 17 points landslide, landslide types of translation and rotation, land cover and soil texture. There is no difference in the type of soil, infiltration rate, vegetation, geologi, slope and rainfall in both types of landslide are found.

Landslide Susceptibility Spatial Modelling Using Random Forest Algorithm: A Case Study of Malang Regency

“…In addition, the area is dominated by geological types originating from extrusive pyroclastic. Extrusive pyroclastic is rocks that are easily weathered, especially highly weathered tuff to fully weathered [15]. Therefore, during the rainy season water will seep into the rock and cause the rock mass to gain weight which increases the potential for landslides.…”

Analisis Sebaran Spasial Kerentanan Longsor Sebagai Upaya Mitigasi Bencana di Kecamatan Berastagi Kabupaten Karo Provinsi Sumatera Utara

“…Pergerakan tanah yang terjadi disebabkan oleh faktor pengendali dan pemicunya secara alami dan tidak alami, dalam beberapa kasus, dapat menyebabkan bencana bagi pergerakan tanah. Bencana pergerakan tanah atau longsor sering terjadi karena bencana tersebut dapat merusak berbagai prasarana Infrastruktur dan menimbulkan banyak kerugian baik ekonomi maupun korban jiwa, sehingga bencana p-ISSN : 2528-3561 e-ISSN : tersebut sangat merugikan [2][3] [4].…”

“…Pemanfaatan lahan dapat menjadi faktor pengontrol gerakan tanah dan meningkatkan resiko gerakan tanah karena pemanfaatan lahan akan berpengaruh pada tutupan lahan yang ada. Suatu vegetasi penutup tanah yang baik seperti rumput yang tebal atau rimba yang lebat akan menghilangkan pengaruh hujan dan topografi terhadap longsor [7].…”

Penilaian Risiko Bencana di Sub DAS Amprong Menggunakan Pendekatan GIS

“…Longsor merupakan gerakan massa tanah atau batuan yang disebabkan oleh adanya gangguan kestabilan lereng (Rosita dkk, 2018;Arsyad, 2018). Beberapa faktor pemicu terjadinya longsor diantarnya adalah faktor alamaiah yang meliputi: kondisi morfologi, struktur geologi, jenis tanah dan kegempaan (Utomo & Widiatmaka, 2013).…”