Abstract
The research area is in the location hit by landslide frequently. Located in Riau-West Sumatra Highway in Km 89-94, Pangkalan Sub District, Lima Puluh Kota District, West Sumatra Province. The research objective to analyse the geomorphological conditions, which is relevance an increased vulnerability to landslides in the study area. The method used consist of geomorphology analysis using morphometric, morphography and morphogenetic parameters. The results of the analysis concluded that the geomorphology of the reserach area is classified into two: High Hills Steep Structural Geomorphology Unit (S2) dominates in all regions and Slightly Steep Hills Denudational Geomorphology Units (D3) is located in the Northeast, the percentages of distribution are 83%, and 17% respectively. Drainage pattern classified to parallel system. Lithology constituent consisting of claystone, siltstone, sandstone, and andesite. Structural geology analysis of joint show trend pattern to the Northwest -Southeast.
Highlights
The research area is located on the Riau - West Sumatra Highway, Tanjung Balik area
As a result of the influence of natural barriers, especially the topography and morphology of the area in the the Barisan Hill, which effects to the slope of a fairly high land, hydrological conditions with high intensity rainfall and chemistryphysics of soil quality, the area of Lima Puluh Kota District is very susceptible to the movement of the soil [4,5,6,7,8,9]
The shape of the land, the slope, the lithology of the region, and the flow pattern that developed in the research area. 3.1.1 Morphometry Based on the results of morphometric analysis of landform research areas are classified into two classes of relief, namely mountainous reliefs and steep mountain reliefs
Summary
The research area is located on the Riau - West Sumatra Highway, Tanjung Balik area. The research area is located at 89-94 Km Highway, Pangkalan Koto Baru Subdistrict, Limapuluh Kota District, West Sumatera Province, regarding administratively. As a result of the influence of natural barriers, especially the topography and morphology of the area in the the Barisan Hill, which effects to the slope of a fairly high land, hydrological conditions with high intensity rainfall and chemistryphysics of soil quality, the area of Lima Puluh Kota District is very susceptible to the movement of the soil [4,5,6,7,8,9]. Research objective is to analyze the geomorphological conditions, which has the relevance of the increased vulnerability to landslides in the research area [9, 12,13,14]
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