Variation Characteristics of Two Erosion Forces and Their Potential Risk Assessment in the Pisha Sandstone Area

Mengyao Xie, Zongping Ren (), Binxia Miao, Zhanbin Li, Xiaoni Ma and Rui Yan
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Mengyao Xie: State Key Laboratory of Eco–Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
Zongping Ren: State Key Laboratory of Eco–Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
Binxia Miao: Shaanxi Institute of Soil and Water Conservation Survey and Planning, Xi’an 710004, China
Zhanbin Li: State Key Laboratory of Eco–Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
Xiaoni Ma: State Key Laboratory of Eco–Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
Rui Yan: Key Laboratory of National Forestry Administration on Ecological Hydrology and Disaster Prevention in Arid Regions, National Forestry and Grassland Administration, Xi’an 710048, China

Sustainability, 2023, vol. 15, issue 7, 1-15

Abstract: Precipitation and wind, as the main external erosion forces in wind–water erosion crisscross regions, have profound impacts on water and soil loss. Meanwhile, with the intensification of climate change and human activities, the variation characteristics and risks caused by erosion forces need to be reassessed. In this study, we explored the time-varying characteristics, differences in action period and spatial distribution, and temporal evolution of risk for the compound events of two erosion forces, including precipitation and wind, in the Pisha sandstone area, one of the most seriously eroding and difficult-to-control areas in the Loess Plateau. The results indicated that: (1) the stationarity of regional precipitation was not destroyed, but the mean change existed in the five subseries divided by the detected change points in wind; (2) wind acted earlier than precipitation and increased from southeast to northwest, while precipitation did the opposite; and (3) precipitation-led erosion has become the main erosion type in this area. The above results reveal the evolution and dominant types of regional external erosion forces in a changing environment and thus have implications for regional erosion studies and policy adjustments.

Keywords: external erosion forces; changing environment; stationarity; precipitation-led erosion; wind–water erosion crisscross region (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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