Journal of Geographical Sciences

Spatial scaling effects of gully erosion in response to driving factors in southern China

LIU Zheng, WEI Yujie, CUI Tingting, LU Hao, CAI Chongfa

地理学报(英文版), 2024, 34(5): 942-962. DOI: 10.1007/s11442-024-2234-y

Figure 3 Flowchart of methodology in this study

本文的其它图/表

Figure 1 Typical gully landforms in southern China
Figure 2 Location of the study area (a. southern China; b. Jiangxi province; c. Ganxian county; d. Tiancun township)
Table 1 Detailed characteristics of the study area in southern China
Table 2 Conditioning factors of gully erosion
Table 3 Factor elimination using multicollinearity analysis and Boruta algorithm
Figure 4 Analysis of the importance of variables using the Boruta algorithm (N, total nitrogen; P, total phosphorus; K, total kalium; SOM, soil organic matter; TWI, topographic wetness index; HI, hypsometric integral; NDVI, normalized difference vegetation index; FVC, fraction vegetation coverage; EVI, enhanced vegetation index; GDP, gross domestic product; LULC, land use and land cover; DEM, elevation)
Figure 5 ROC curves of gully susceptibility maps by MLR, LMT, and RF models in different spatial scales (a-c. southern China; d-f. Jiangxi province; g-i. Ganxian county; j-l. Tiancun township)
Figure 6 Comparison of model accuracy in terms of scale and data input
Figure 7 Gully erosion susceptibility maps using the random forest (RF) model (a. southern China; b. Jiangxi province; c. Ganxian county; d. Tiancun township)