Journal cover Journal topic
Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 5.153
IF5.153
IF 5-year value: 5.460
IF 5-year
5.460
CiteScore value: 7.8
CiteScore
7.8
SNIP value: 1.623
SNIP1.623
IPP value: 4.91
IPP4.91
SJR value: 2.092
SJR2.092
Scimago H <br class='widget-line-break'>index value: 123
Scimago H
index
123
h5-index value: 65
h5-index65
Preprints
https://doi.org/10.5194/hess-2020-266
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-2020-266
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  01 Oct 2020

01 Oct 2020

Review status
This preprint is currently under review for the journal HESS.

Preferential water flow through decayed root channels enhances soil water infiltration: Evaluation in distinct vegetation types under semi-arid conditions

Gao-Lin Wu1,2,3, Manuel López‐Vicente4, Ze Huang1,2,5, Zeng Cui1,2, and Yu Liu1,2 Gao-Lin Wu et al.
  • 1State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China
  • 2Institute of Soil and Water Conservation, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resource, Yangling, Shaanxi 712100, China
  • 3CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China
  • 4Team Soil, Water and Land Use, Wageningen Environmental Research, Droevendaalsesteeg 3, Wageningen, 6708RC, Netherlands
  • 5College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China

Abstract. Topsoil desiccation alters soil physical characteristics and seriously limits plant growth in semi-arid and arid areas. The phenomenon of dried soil layer has generated increasing attention, but the process of preferential flow through decayed root channels – when the plants decompose after death – and its benefits on soil water supply in the soil dry layers are rarely evaluated. This study examines the effects of root channels on soil infiltrability in three contrasted vegetation types developed in a loessial soil, namely: Scrubland (Caragana korshinskii), fruit tree plantation (Armeniaca vulgaris) and grassland (Medicago sativa; using data from a previous study); setting bare land as control. The infiltration rates of the alive and decayed specimens were measured using a double-ring infiltrometer, and methylene blue allowed us to trace the pathways of water flow. Results indicated that scrubland species had the highest steady infiltration rates, which were about 23 % and 83 % higher than those rates measured in the fruit tree plantation and grasslands, respectively. Regarding root geometry, the steady infiltration rates were significantly and positively correlated with the average root channel diameter (ARCD) and area (RCA). Under the same root diameter conditions, soil water infiltrability significantly improved in the decayed root plots and compared with the alive root plots. Our findings contribute to a better understanding of the effects of root channels of different degraded vegetation types on soil moisture and infiltrability, which are conductive to provide knowledge base in the research of hydrological processes in degraded soils in water-scarce regions.

Gao-Lin Wu et al.

Interactive discussion

Status: open (until 02 Dec 2020)
Status: open (until 02 Dec 2020)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement

Gao-Lin Wu et al.

Gao-Lin Wu et al.

Viewed

Total article views: 291 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
244 45 2 291 1 3
  • HTML: 244
  • PDF: 45
  • XML: 2
  • Total: 291
  • BibTeX: 1
  • EndNote: 3
Views and downloads (calculated since 01 Oct 2020)
Cumulative views and downloads (calculated since 01 Oct 2020)

Viewed (geographical distribution)

Total article views: 236 (including HTML, PDF, and XML) Thereof 236 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 26 Oct 2020
Publications Copernicus
Download
Citation