Early warning of mudflows in single-gully and area in the loess region
[Objective]This study proposes a single-channel and regional early warning model for gully-type mudflows in loess areas,which provides a reference for early warning of mudflows in loess region.[Methods]Data related to mudflow formation,including rainfall conditions,topographic conditions and geological conditions,were collected from the literature for analysis.The mudflow early-warning model was developed by using the generalized mudflow early-warning method to provide single-gully and regional early warning for mudflows in some areas of the Loess Plateau.Moreover,the model was compared with the early-warning method that is based on the critical rainfall intensity.[Results]In single-gully early warning,the success rate of the mudflow early-warning model for 47 mudflow events in the loess region was approximately 90％.In regional early warning,the success rate of the mudflow early-warning model for Xifeng District,Zhenyuan County,and Yan'an City was almost 100％.The success rate of the simplified rainfall early-warning model for mudflows in the loess region was approximately 90％by using the integrated precipitation threshold value.[Conclusion]Compared with previous studies,where the mudflow early-warning method is based on the critical rainfall intensity,the model developed in this study that is meant for single-gully and regional early warning of mudflows in the loess region comprehensively considers the crucial factors,has high accuracy and ensures detailed early-warning results.
万方数据
维普
