Open AccessExperimental Study on Influence of Vegetation Roots on Hydraulic Characteristics of Slope under Rainfall
Author(s) -
Suyun Meng,
Guozhen Zhao,
Yiqin Yang
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1838/1/012057
Subject(s) - vegetation and slope stability , suction , soil science , environmental science , soil water , slope stability , permeability (electromagnetism) , water flow , water content , geotechnical engineering , water retention , hydrology (agriculture) , geology , chemistry , mechanical engineering , biochemistry , engineering , membrane
The water uptake by roots can change the soil permeability of slope. However, the affect mechanism of roots on hydraulic characteristics of slope under rainfall is insufficient. A laboratory test of vegetated slope and bare slope under rainfall was conducted to investigate the variety and distribution of suction. The influence of root water uptake on soil suction and water content of slope was studied. The soil water characteristic curve of bare slope and vegetated slope was established to study the influence of root water uptake on the water-holding capacity of soil. The results show that the influence range of root water uptake on the soil suction can reach twice the root depth, and the suction in the downhill position is smaller than that in the upward position induced by the lateral flow of water. In addition, root water uptake makes the suction of vegetated slope higher than that of bare slope, which will improve the water-holding capacity of soil, and then enhance the shallow stability of slope.