Application Research on Geological Hazard Risk Zonation Evaluation Based on GIS Information Fusion:A Case Study of Bama County

DOI: https://doi.org/10.62517/jsse.202508403

Author(s)

Qiongzhen Tang1,*, Shenye Liu1,2, Jijun Zeng3

Affiliation(s)

1School of Intelligent Engineering, Xiangsihu College of Guangxi Minzu University, Nanning, Guangxi, China 2Guangxi Chuanjinnuo Chemical Co., Ltd., Fangchenggang, Guangxi, China 3Guangxi Hydrogeological and Engineering Geological Exploration Institute, Liuzhou, Guangxi, China *Corresponding Author

Abstract

Given frequent landslide hazards and insufficient collaborative analysis of multi-source data in the carbonaceous mudstone mountainous areas of Bama County, this study uses GIS information fusion technology as the core to construct a three-level fusion framework. It is a "Data Layer-Feature Layer-Decision-making Layer" framework for geological hazard risk zonation evaluation. By integrating multi-source data including terrain (DEM), geology (structure, lithology), meteorology (rainfall), vegetation (NDVI) and historical hazards, the study area is divided into 5 risk levels, and the model accuracy is verified by 107 historical landslide points. The results show that: (1) GIS information fusion effectively integrates multi-source heterogeneous data, which solves the limitations of single data, and the model's recognition accuracy for high-risk areas reaches 89.7%; (2) the high-risk areas (Level 4-5) in Bama County account for 28.8%, concentrated in the area within < 0.5km around the northwestern Bama Fault Zone, the carbonaceous mudstone distribution area with slope > 25° and annual average rainfall > 1400mm; (3) the low-risk areas (Level 1-2) account for 46.6%, mainly distributed in the gentle areas with vegetation coverage > 60% in the southwest. Moreover, this study can serve as a reference for geological hazard prevention and control, as well as for risk management, in Bama County.

Keywords

GIS; Information Fusion; Geological Hazards; Risk Zonation; Carbonaceous Mudstone

References

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