Spatial variation in the frequency and magnitude of mass movement in a semiarid, complex‐terrain agricultural watershed on the L oess P lateau of C hina
| Autor: | Xiangzhou Xu, A-Xing Zhu, Tongxin Zhu |
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| Rok vydání: | 2019 |
| Předmět: |
Watershed
Mass movement Erosion control Soil Science Sediment Magnitude (mathematics) Landslide 04 agricultural and veterinary sciences 010501 environmental sciences Development 01 natural sciences 040103 agronomy & agriculture Erosion 0401 agriculture forestry and fisheries Environmental Chemistry Environmental science Spatial variability Physical geography 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Land Degradation & Development. 30:1095-1106 |
| ISSN: | 1099-145X 1085-3278 |
| DOI: | 10.1002/ldr.3296 |
| Popis: | The previous inventory datasets of mass movement typically include large‐sized mass movements (e.g., landslides), whereas small ones are often missing due to either being too small to be interpreted from remote sensing images or too time‐consuming to measure them in the field. Thus, the relative significance of different‐sized mass movement in sediment production remains unknown. In this study, first, a total of 547 recent mass movements, with a volume ranging from 0.3 to 19,000 m³, are surveyed in a small complex‐terrain watershed on the Loess Plateau of China; then, sediment contributions by mass movement of different magnitude and frequency are evaluated; furthermore, the effects of causative factors on both mass movement frequency and magnitude are examined and compared; finally, Geographic Information Systems (GIS) and statistical methods are employed to assess mass movement susceptibility and erosion risk. The results showed that majority of the mass movements are very small ( |
| Databáze: | OpenAIRE |
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