Runoff and soil erosion of field plots in a subtropical mountainous region of China
| Autor: | N.F. Fang, Zhi-Hua Shi, L. Wang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Hydrology
010504 meteorology & atmospheric sciences Land use Humid subtropical climate Soil science 04 agricultural and veterinary sciences Subtropics 01 natural sciences Tillage Agricultural land 040103 agronomy & agriculture Erosion 0401 agriculture forestry and fisheries Environmental science Precipitation Surface runoff 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Journal of Hydrology. 552:387-395 |
| ISSN: | 0022-1694 |
| Popis: | Anthropogenic pressure coupled with strong precipitation events and a mountainous landscape have led to serious soil erosion and associated problems in the subtropical climate zone of China. This study analyzes 1576 rainfall-runoff-soil loss events at 36 experimental plots (a total of 148 plot-years of data) under a wide range of conditions in subtropical mountainous areas of China where slope farming is commonly practiced. The plots, which have standardized dimensions, represent five common types of land use and have four different slopes. Event-based analyses show that almost half of the total rainfall caused soil erosion in the study area. The dominant factor controlling the runoff coefficient is the slope gradient rather than the land use type. The maximum soil lossfor crop plots under steep tillage (35°) is 5004 t km−2 for a single event. Among the common local crops, the average soil loss values increase in the following order: buckwheat cropland (1179 t km−2 year−1) > terraced cropland (1083 t km−2 year−1) > orchard land (1020 t km−2 year−1) > grassland (762 t km−2 year−1) > terraced orchard land (297 t km−2 year−1) > forest and grassland (281 t km−2 year−1). |
| Databáze: | OpenAIRE |
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