The relationship between geological disasters with land use change, meteorological and hydrological factors: A case study of Neijiang City in Sichuan Province

• Published in: Ecological indicators 2023-10, Vol.154, p.110840, Article 110840
• Main Authors: Xin, Zhang, Xiaoyu, Zeng, hao, Luo, Chenyi, Zhou, Zhile, Shu, Lijun, Jiang, Zelin, Wang, Zheng, Fei, Jiayang, Yu, Xin, Yang, Wenwu, Zhong
• Format: Article
• Language: English
• Subjects: Ecological environment; Geographic information system; Geological disasters; Hydrology; Land use; Meteorology
• ISSN: 1470-160X
• DOI: 10.1016/j.ecolind.2023.110840

•Geological disasters in hilly areas are related to Land-Use and Land-Cover Changes.•The number of geological disasters in the cultivated land area is the largest.•The point density of geological disasters and vegetation coverage is limited.•Geological disasters are more likely to occur in the period of heavy rainfall.•The closer geological disaster to river, the greater probability/scale of occurrence. Sichuan hilly area is located in southwest China, which have many hilly area, is a densely populated, economically active, frequent geological disasters area. In this paper, Neijiang City in the region is taken as the test sample. This article, which analyzes Land-Use and Land-Cover Changes (LUCC), meteorological and hydrological data from 2015 to 2020, takes Neijiang City in this region as the research object. We explored the relationship between geological disasters such as collapse and landslides that often occur in the natural ecological environment with LUCC and meteorological and hydrological factors, using GIS spatial analysis and statistical analysis methods. The research results indicate that geological disasters mainly occur in farmland areas. The density of geological disaster points is highest within urban areas, making them the most prone to geological disasters. Geological disasters are more densely distributed in the area within 600 to 800 m from the river. There is a strong correlation between the average rainfall amount and the probability of geological disasters occurring. This study provides a scientific basis for the geological disaster risk assessment, prevention and control in this region. It has certain reference significance for the ecological environment governance, land resources planning and management in other similar regions.