Influence of vegetation coverage on surface runoff and soil moisture in rainy season in dry-hot valley | 干热河谷植被覆盖对雨季地表径流和土壤水分的影响
2010
Guo Fenfen, Chinese Academy of Sciences & Ministry of Water Conservation, Chengdu (China), Chengdu Institute of Mountain Hazards and Environment | Nan Ling, Chinese Academy of Sciences & Ministry of Water Conservation, Chengdu (China), Chengdu Institute of Mountain Hazards and Environment | Chen Anqiang, Chinese Academy of Sciences & Ministry of Water Conservation, Chengdu (China), Chengdu Institute of Mountain Hazards and Environment
[Objective] The research aimed to study the effects of vegetation coverage on the changes of soil moisture in rainy season in dry-hot valley. [Method] The surface runoff and soil moisture of slope with vegetation coverage and bare land in rainy reason in Jinsha River at Yuanmou County of Yunnan Province were observed continuously. And the statistical analysis was made on the observation data. [Result] The vegetation coverage could decrease surface runoff and the surface runoff on bare land (CK) was 22 times as the plot with vegetation coverage. The soil water content in 0-180 cm layer with vegetation coverage increased by 37.8% than bare land. The stability of soil moisture content in deep layer was enhanced and the physical properties stability of soil was maintained. The soil moisture content in different depth of soil had significant difference and the changes of soil moisture content were obviously different. [Conclusion] The vegetation coverage of slope could change the soil hydrology obviously and keep soil moisture at the higher level，especially at soil layer below 20 cm.
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