Rights statement: This is the peer reviewed version of the following article: Tuvia Turkeltaub, Jiao Wang, Qinbo Cheng, Xiaoxu Jia,Yuanjun Zhu, Ming-An Shao, Andrew Binley (2022), Soil moisture and electrical conductivity relationships under typical Loess Plateau land covers. Vadose Zone Journal. doi: 10.1002/vzj2.20174 which has been published in final form at https://acsess.onlinelibrary.wiley.com/doi/10.1002/vzj2.20174 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Accepted author manuscript, 1.9 MB, PDF document
Available under license: CC BY: Creative Commons Attribution 4.0 International License
Final published version
Licence: CC BY: Creative Commons Attribution 4.0 International License
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Soil moisture and electrical conductivity relationships under typical Loess Plateau land covers
AU - Turkeltaub, Tuvia
AU - Wang, Jiao
AU - Cheng, Qinbo
AU - Jia, Xiaoxu
AU - Zhu, Yuanjun Zhu
AU - Shao, Ming-An
AU - Binley, Andrew
N1 - This is the peer reviewed version of the following article: Tuvia Turkeltaub, Jiao Wang, Qinbo Cheng, Xiaoxu Jia,Yuanjun Zhu, Ming-An Shao, Andrew Binley (2022), Soil moisture and electrical conductivity relationships under typical Loess Plateau land covers. Vadose Zone Journal. doi: 10.1002/vzj2.20174 which has been published in final form at https://acsess.onlinelibrary.wiley.com/doi/10.1002/vzj2.20174 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
PY - 2022/1/19
Y1 - 2022/1/19
N2 - Vegetation changes that are driven by soil conservation measures significantly affect subsurface water flow patterns and soil water status. Much research on water consumption and sustainability of newly introduced vegetation types at the plot scale has been done in the Loess Plateau of China (LPC), typically using local scale measurements of soil water content (SWC). However, information collected at the plot scale cannot readily be up-scaled. Geophysical methods such as electromagnetic induction (EMI) offer large spatial coverage and, therefore, could bridge between the scales. A noninvasive, multicoil, frequency domain, EMI instrument was used to measure the apparent soil electrical conductivity (σ a) from six effective depths under four typical land-covers (shrub, pasture, natural fallow, and crop) in the north of the LPC. Concurrently, SWC was monitored to a depth of 4 m using an array of 44 neutron probes distributed along the plots. The measurements of σ a for six effective depths and the integrated SWC over these depths, show consistent behavior. High variability of σ a under shrub cover, in particular, is consistent with long term variability of SWC, highlighting the potential unsustainability of this land cover. Linear relationships between SWC and σ a were established using cumulative sensitivity forward models. The conductivity–SWC model parameters show clear variation with depth despite lack of appreciable textural variation. This is likely related to the combined effect of elevated pore water conductivity as was illustrated by the simulations obtained with water flow and solute transport models. The results of the study highlight the potential for the implementation of the EMI method for investigations of water distribution in the vadose zone of the LPC, and in particular for qualitative mapping of the vulnerability to excessive vegetation demands and hence, unsustainable land cover.
AB - Vegetation changes that are driven by soil conservation measures significantly affect subsurface water flow patterns and soil water status. Much research on water consumption and sustainability of newly introduced vegetation types at the plot scale has been done in the Loess Plateau of China (LPC), typically using local scale measurements of soil water content (SWC). However, information collected at the plot scale cannot readily be up-scaled. Geophysical methods such as electromagnetic induction (EMI) offer large spatial coverage and, therefore, could bridge between the scales. A noninvasive, multicoil, frequency domain, EMI instrument was used to measure the apparent soil electrical conductivity (σ a) from six effective depths under four typical land-covers (shrub, pasture, natural fallow, and crop) in the north of the LPC. Concurrently, SWC was monitored to a depth of 4 m using an array of 44 neutron probes distributed along the plots. The measurements of σ a for six effective depths and the integrated SWC over these depths, show consistent behavior. High variability of σ a under shrub cover, in particular, is consistent with long term variability of SWC, highlighting the potential unsustainability of this land cover. Linear relationships between SWC and σ a were established using cumulative sensitivity forward models. The conductivity–SWC model parameters show clear variation with depth despite lack of appreciable textural variation. This is likely related to the combined effect of elevated pore water conductivity as was illustrated by the simulations obtained with water flow and solute transport models. The results of the study highlight the potential for the implementation of the EMI method for investigations of water distribution in the vadose zone of the LPC, and in particular for qualitative mapping of the vulnerability to excessive vegetation demands and hence, unsustainable land cover.
U2 - 10.1002/vzj2.20174
DO - 10.1002/vzj2.20174
M3 - Journal article
VL - 21
JO - Vadose Zone Journal
JF - Vadose Zone Journal
SN - 1539-1663
IS - 1
M1 - e20174
ER -