Documentation of Landslide Occurrence and Significance in Mbonjo, Limbe Town, South-West Cameroon

Proceedings

article

Bih Mirabel Kum¹  George Mafany Teke²  Anicet Feudjio Tiabou¹  Igor Fulbert Ngantche Mbowou¹  Christopher Mbaringong Agyingi³ 

[1] Volcanology and Environmental Geosciences Research Unit, Department of Geology, Faculty of Science, University of Buea;Ministry of Scientific Research and Innovation;Petroleum Geology and Sedimentology Research Unit, Department of Geology, Faculty of Science, University of Buea

关键词: digital elevation model;    landslide;    remote sensing;    slope;    unmanned aerial vehicle;   

DOI  :  10.3390/IECG2022-14267

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

Recent landslides in Mbonjo, located between 3°55″–4°13″ N and 9°12″–9°23″ E in the coastal town of Limbe, were mapped using an unmanned aerial vehicle, field mapping and remote sensing techniques, and documented in this paper. This town is susceptible to natural hazards and in July 2018 and 2020, a swarm of landslides occurred in Mbonjo towards the outskirts of Limbe, killing five people and injuring ten others, obstructing the road and destroying important properties. These landslides were studied for a better understanding of the occurrence of such natural phenomena and for human threat diminution. From the field studies, the slides were small to medium scale, characterized by low slope gradients (15–25°), and short depletion zones (20–25 m) and length (~31.1 m). These slides covered an area of 603.5–2000.75 m2 and the volume of ground debris was bracketed as between 626.81 and 8757.60 m3. Slope steepness and human activities such as excavation of the slopes were the main conditioning factors, whereas intense rainfall was the main trigger of Mbonjo landslides. It is urgent to take concrete measures to tackle this serious threat to human life in the study area.

【 授权许可】

CC BY