Soil-water repellency characteristic curves for soil profiles with organic carbon gradients

Nadeeka Senani Wijewardana, Karin Müller, Per Moldrup, Brent Clothier, Toshiko Komatsu, Syuntaro Hiradate, Lis Wollesen de Jonge, Ken Kawamoto

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Soil water repellency (SWR) of soils is a property with significant consequences for agricultural water management, water infiltration, contaminant transport, and for soil erosion. It is caused by the presence of hydrophobic agents on mineral grain surfaces. Soils were samples in different depths at three forest sites in Japan and three pasture sites in New Zealand, covering soil organic carbon (SOC) contents between 1 and 26%. The SWR was measured over a range of water contents by three common methods; the water drop penetration time (WDPT) test, the molarity of an ethanol droplet (MED) method, and the sessile drop method (SDM). The aim to (i) compare the methods, (ii) characterize the soil-water repellency characteristic curves (SWRCC) being SWR as a function of the volumetric soil-water content (θ) or matric potential (ψ), and (iii) find relationships between SWRCC parameters and SOC content. The WDPT, MED, and SDM generally agreed well in predicting the θ range where SWR occurred, and there was close agreement between SWR results determined by average MED and SDM at similar θ. Generally, SWR was only found within the top 20cm of the soil profiles. Six SWR parameters were introduced: (i) the area under the curve (SWR(θ)); (ii) θ at the maximum SWR (θWR-max), (iii) θ where SWR ceased (θnon-WR), (iv) the maximum SWR (CAi-max), (v) pF at the maximum SWR (pFWR-max) and (vi) pF where SWR ceased (pFnon-WR). The relationship between the first three parameters and SOC content were best described with Langmuir type equations (r2 of 0.5-0.7), while the other three parameters changed linearly with SOC contents.

Original languageEnglish
Pages (from-to)150-159
Number of pages10
JournalGeoderma
Volume264
DOIs
Publication statusPublished - Feb 15 2016
Externally publishedYes

Fingerprint

soil water characteristic
soil profiles
soil profile
soil water
organic carbon
carbon
soil organic carbon
droplets
ethanol
droplet
soil
methodology
penetration
water content
water
matric potential
water management
soil erosion
topsoil
infiltration (hydrology)

All Science Journal Classification (ASJC) codes

  • Soil Science

Cite this

Wijewardana, N. S., Müller, K., Moldrup, P., Clothier, B., Komatsu, T., Hiradate, S., ... Kawamoto, K. (2016). Soil-water repellency characteristic curves for soil profiles with organic carbon gradients. Geoderma, 264, 150-159. https://doi.org/10.1016/j.geoderma.2015.10.020

Soil-water repellency characteristic curves for soil profiles with organic carbon gradients. / Wijewardana, Nadeeka Senani; Müller, Karin; Moldrup, Per; Clothier, Brent; Komatsu, Toshiko; Hiradate, Syuntaro; de Jonge, Lis Wollesen; Kawamoto, Ken.

In: Geoderma, Vol. 264, 15.02.2016, p. 150-159.

Research output: Contribution to journalArticle

Wijewardana, NS, Müller, K, Moldrup, P, Clothier, B, Komatsu, T, Hiradate, S, de Jonge, LW & Kawamoto, K 2016, 'Soil-water repellency characteristic curves for soil profiles with organic carbon gradients', Geoderma, vol. 264, pp. 150-159. https://doi.org/10.1016/j.geoderma.2015.10.020
Wijewardana, Nadeeka Senani ; Müller, Karin ; Moldrup, Per ; Clothier, Brent ; Komatsu, Toshiko ; Hiradate, Syuntaro ; de Jonge, Lis Wollesen ; Kawamoto, Ken. / Soil-water repellency characteristic curves for soil profiles with organic carbon gradients. In: Geoderma. 2016 ; Vol. 264. pp. 150-159.
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