A new early warning criterion for landslides movement assessment: Deformation Standardized Anomaly Index
Citation
Zhang, J., Tang, H., Zhou, B., Wen, T., Li, L. (2024). A new early warning criterion for landslides movement assessment: Deformation Standardized Anomaly Index. Bulletin of Engineering Geology and the Environment, 83: 205. Link to paper
Abstract
The complexity and oscillatory nature of landslide displacement types, influenced by diverse deformation patterns, monitoring errors, and varied observation time frames, present challenges for the application of traditional warning criteria. This study proposes a data-dependent early warning criterion through dimensionless analysis of displacement for two typical landslide displacement patterns: exponential pattern and step-like pattern. The displacement trend in exponential pattern landslides is extracted using the simple moving average (SMA) method, with the onset of acceleration (OOA) determined through application of the Pettitt test. The Deformation Standardized Anomaly Index (DSAI) is defined to quantitatively evaluate the alert levels corresponding to each monitored displacement data of both patterns.