期刊
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
卷 43, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.ejrh.2022.101196
关键词
Machine learning; MaxEnt model; LiDAR; Gully erosion; Gully erosion susceptibility mapping; Soil erosion
资金
- U.S. Department of Agriculture
- National Institute for Food and Agriculture (NIFA) [2019-67019-29884]
- National Science Foundation
- Prairie research institute, University of Illinois at Urbana-Champaign
This study conducted a regional research in Jefferson County, Illinois, USA, and used remote sensed environmental data to predict gully erosion susceptibility in agricultural land. The study identified key environmental factors contributing to gully erosion and emphasized the importance of high temporal resolution in improving model predictability.
Study region: The study was tested in Jefferson County in Illinois, USA, whose land use is a typical representation of row crop cultivation in the Midwestern USA. Study focus: This study aimed to predict the gully erosion susceptibility in agricultural land using remote sensed environmental data (topographic, pedologic, land cover, precipitation, and vegetation development) considering their spatio-temporal variability in a modeling framework based on the maximum entropy model MaxEnt. The methodology thoroughly evaluated each environmental factor contributing to gully erosion prediction and used a set of rules based on accuracy, transferability, and efficiency to evaluate the model performance. New Hydrological Insights for the Region: This study developed a data-driven modeling framework that can be applied across other regions. The modeling framework indicates that fifteen factors were the most relevant for developing the gully erosion susceptibility map, where 7.4% of the agricultural land in the study area was found at elevated risk of developing gully erosion. Slope, land cover, organic matter, seasonal LAI, and maximum daily precipitation were the most contributing environmental factors to the study area. Furthermore, this study identified the importance of high temporal resolution in varying seasonal factors (i.e., leaf area index and precipitation) to improve model predictability compared to annual temporal discretization.
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