Moisture Migration of Vegetation Concrete Under Buried Drip Irrigation in Soil
CSTR:
Author:
Affiliation:

Clc Number:

S152.7

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    The purpose of this study was to explore the influence of dripper discharge and slope factors on vegetation-concrete moisture migration by using composite artificial soil. The dynamics of wetting front of vegetation concrete and spatial-temporal distribution of soil moisture under buried drip irrigation in soil were studied, and the similarities and differences of moisture transfer between vegetation concrete and natural soil were discussed as well, which could provide theoretical reference for irrigation scheduling of drip irrigation during ecological restoration of high-steep slope. The results showed that dripper discharge rate and slope had the greatest influence on vertically upward moisture migration, but had little impact in horizontal direction. At the earlier stage of irrigation, the influence of soil matrix suction was much greater than that of gravity, and the vertically upward distance of moisture migration was similar to the horizontal distance. During the middle period, the infiltration rate in vertically upward and horizontal directions decreased with the increases of slopes. At the later stage, the vertically downward migration rate gradually tended to be stable, which was mainly induced by gravity. At the same irrigation volume, the smaller the flow rate, the farther the wetting front would migrate. During the period of moisture redistribution, the distance of vertically downward migration was the farthest, followed by horizontal direction, and vertically upward distance was the nearest. The contours of moisture content were oval, and vertically downward moisture content were larger than those in vertically upward and horizontal direction. Both power and quadratic functions could fit the relationship between the distance of wetting front migration and infiltration time, of which power function was better(R2>0.95), but R2 was slightly smaller than that of natural soil, which expanded the application scope of Soil Hydrodynamics in the composite soil.

    Reference
    Related
    Cited by
Get Citation
Related Videos

Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:August 30,2021
  • Revised:
  • Adopted:
  • Online: April 07,2022
  • Published:
Article QR Code