Agricultural and Biological Sciences
4 years ago

Vegetation coverage key to reducing soil and nutrient loss in rainfall.

Hydrological Processes
Direct and indirect effects of rainfall and vegetation coverage on runoff, soil loss, and nutrient loss in a semi‐humid climate
Jiayi Huo, Changjun Liu, Xinxiao Yu, Lihua Chen, Wenge Zheng, Yuanhui Yang, Changwen Yin

Paper Summary

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Soil erosion and nutrient loss can harm water bodies. Researchers studied how rainfall and vegetation affect soil and nutrient loss in Beijing. They found that soil erosion decreased with 20% to 60% vegetation coverage. Nutrient loss was lowest with over 60% coverage. High-intensity rainfall led to more nutrient loss than low-intensity rainfall. Runoff, rainfall intensity, depth, and soil loss were key factors in soil nutrient loss. Vegetation and soil moisture did not affect runoff and soil loss during heavy rainfall. Understanding these factors can help reduce pollution from slopes.