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Rui Tian - One of the best experts on this subject based on the ideXlab platform.

  • Coupling effects of humus and 2:1 type electrolyte on Soil Water Movement
    Geoderma, 2020
    Co-Authors: Rui Tian, Runhua Zhang, Xin Min Liu
    Abstract:

    Abstract Recent studies have shown that, Soil particle interaction forces strongly affect Soil Water Movement. Classically, humus could increase the attractive forces through the complex interactions between humus and clay particles, but in the meanwhile humus could increase Soil electric field and thus increase electrostatic repulsive forces due to surface charges of humus. On the other hand, electrolyte concentrations could affect Soil particle interactions through the influence on Soil electric field and osmotic pressure. Therefore, the effect of humus and electrolyte concentration would be coupled in Soil Water Movement. In this study, the coupling effects were explored with a purple Soil under different humus contents and MgCl2 concentrations. The results showed that: (i) the total repulsive energies among Soil particles would increase with increasing humus content, and Soil aggregate stability as well as the Soil Water transportation and infiltration would correspondingly decrease; (ii) a critical MgCl2 concentration was observed, and at the critical concentration the total repulsive energy was the lowest, while both the Soil aggregate stability and Soil Water Movement were the highest; (iii) humus content did not significantly change the critical concentrations. The analysis of Water Movement changing with Soil particle interaction energy showed that, both of them decreased linearly with increasing total repulsive energies between Soil particles, and different humus contents obeyed the same linear relationship for Water Movement. We concluded that, (i) the total repulsive energies between Soil particles control Soil Water Movement through their effect on Soil aggregate stability; (ii) humus affected Soil Water Movement mainly through its effect on the total repulsive energy between Soil particles; (iii) the total repulsive energy was mainly from the electrostatic repulsive force among Soil particles as MgCl2 concentration was lower than the critical concentration, while it was mainly from the osmotic pressure when the MgCl2 concentration was higher than the critical concentration.

  • coupling effects of surface charges adsorbed counterions and particle size distribution on Soil Water infiltration and transport
    European Journal of Soil Science, 2018
    Co-Authors: Y. Gong, Rui Tian, Hang Li
    Abstract:

    Soil pores are the channels for Water transport. The surface charges, the non‐classic polarizabilities and concentrations of the adsorbed counterions in a Soil determine Soil particle interaction forces that affect Soil pore status. Particle‐size distribution is another important factor that affects Soil pore status. Therefore, surface charges, adsorbed counterions and particle‐size distribution would probably be coupled in Soil Water transport. In this study, two Soils with different surface charge densities, different adsorbed counterions and different particle‐size distributions were used to study their coupling effects on Soil Water Movement. The results showed that these factors were strongly coupled in Soil Water Movement. When the Soil electric field strength was strong (depending on surface charges, adsorbed counterion polarizabilities and concentrations), the net interaction forces of Soil particles was repulsive, thus Soil aggregates could be broken. The degree of aggregate breakdown coupled with particle‐size distribution determined Soil Water Movement. For this case we found that (i) increasing attractive forces of Soil particles could greatly improve Soil Water Movement and (ii) Water Movement was slow when the Soil had large clay or small silt or sand contents. When the Soil electric field was weak, the net interaction force of Soil particles was attractive, thus aggregates could not be broken. For this case we found that (i) further increasing the attractive forces of Soil particles could not improve Soil Water Movement and (ii) Water Movement was fast when the Soil had large clay or small silt or sand contents. HIGHLIGHTS: Coupling effects of particle size and particle interactions on Soil Water Movement are not clear. Large clay contents can decrease or increase Soil Water Movement depending on Soil particle interaction forces. Fast Water Movement occurred in Soil with strongly polarized cations and large clay content. Particle interaction forces and particle‐size distribution were strongly coupled in Soil Water Movement.

  • Coupling effects of surface charges, adsorbed counterions and particle‐size distribution on Soil Water infiltration and transport
    European Journal of Soil Science, 2018
    Co-Authors: Y. Gong, Rui Tian
    Abstract:

    Soil pores are the channels for Water transport. The surface charges, the non‐classic polarizabilities and concentrations of the adsorbed counterions in a Soil determine Soil particle interaction forces that affect Soil pore status. Particle‐size distribution is another important factor that affects Soil pore status. Therefore, surface charges, adsorbed counterions and particle‐size distribution would probably be coupled in Soil Water transport. In this study, two Soils with different surface charge densities, different adsorbed counterions and different particle‐size distributions were used to study their coupling effects on Soil Water Movement. The results showed that these factors were strongly coupled in Soil Water Movement. When the Soil electric field strength was strong (depending on surface charges, adsorbed counterion polarizabilities and concentrations), the net interaction forces of Soil particles was repulsive, thus Soil aggregates could be broken. The degree of aggregate breakdown coupled with particle‐size distribution determined Soil Water Movement. For this case we found that (i) increasing attractive forces of Soil particles could greatly improve Soil Water Movement and (ii) Water Movement was slow when the Soil had large clay or small silt or sand contents. When the Soil electric field was weak, the net interaction force of Soil particles was attractive, thus aggregates could not be broken. For this case we found that (i) further increasing the attractive forces of Soil particles could not improve Soil Water Movement and (ii) Water Movement was fast when the Soil had large clay or small silt or sand contents. HIGHLIGHTS: Coupling effects of particle size and particle interactions on Soil Water Movement are not clear. Large clay contents can decrease or increase Soil Water Movement depending on Soil particle interaction forces. Fast Water Movement occurred in Soil with strongly polarized cations and large clay content. Particle interaction forces and particle‐size distribution were strongly coupled in Soil Water Movement.

Y. Gong - One of the best experts on this subject based on the ideXlab platform.

  • coupling effects of surface charges adsorbed counterions and particle size distribution on Soil Water infiltration and transport
    European Journal of Soil Science, 2018
    Co-Authors: Y. Gong, Rui Tian, Hang Li
    Abstract:

    Soil pores are the channels for Water transport. The surface charges, the non‐classic polarizabilities and concentrations of the adsorbed counterions in a Soil determine Soil particle interaction forces that affect Soil pore status. Particle‐size distribution is another important factor that affects Soil pore status. Therefore, surface charges, adsorbed counterions and particle‐size distribution would probably be coupled in Soil Water transport. In this study, two Soils with different surface charge densities, different adsorbed counterions and different particle‐size distributions were used to study their coupling effects on Soil Water Movement. The results showed that these factors were strongly coupled in Soil Water Movement. When the Soil electric field strength was strong (depending on surface charges, adsorbed counterion polarizabilities and concentrations), the net interaction forces of Soil particles was repulsive, thus Soil aggregates could be broken. The degree of aggregate breakdown coupled with particle‐size distribution determined Soil Water Movement. For this case we found that (i) increasing attractive forces of Soil particles could greatly improve Soil Water Movement and (ii) Water Movement was slow when the Soil had large clay or small silt or sand contents. When the Soil electric field was weak, the net interaction force of Soil particles was attractive, thus aggregates could not be broken. For this case we found that (i) further increasing the attractive forces of Soil particles could not improve Soil Water Movement and (ii) Water Movement was fast when the Soil had large clay or small silt or sand contents. HIGHLIGHTS: Coupling effects of particle size and particle interactions on Soil Water Movement are not clear. Large clay contents can decrease or increase Soil Water Movement depending on Soil particle interaction forces. Fast Water Movement occurred in Soil with strongly polarized cations and large clay content. Particle interaction forces and particle‐size distribution were strongly coupled in Soil Water Movement.

  • Coupling effects of surface charges, adsorbed counterions and particle‐size distribution on Soil Water infiltration and transport
    European Journal of Soil Science, 2018
    Co-Authors: Y. Gong, Rui Tian
    Abstract:

    Soil pores are the channels for Water transport. The surface charges, the non‐classic polarizabilities and concentrations of the adsorbed counterions in a Soil determine Soil particle interaction forces that affect Soil pore status. Particle‐size distribution is another important factor that affects Soil pore status. Therefore, surface charges, adsorbed counterions and particle‐size distribution would probably be coupled in Soil Water transport. In this study, two Soils with different surface charge densities, different adsorbed counterions and different particle‐size distributions were used to study their coupling effects on Soil Water Movement. The results showed that these factors were strongly coupled in Soil Water Movement. When the Soil electric field strength was strong (depending on surface charges, adsorbed counterion polarizabilities and concentrations), the net interaction forces of Soil particles was repulsive, thus Soil aggregates could be broken. The degree of aggregate breakdown coupled with particle‐size distribution determined Soil Water Movement. For this case we found that (i) increasing attractive forces of Soil particles could greatly improve Soil Water Movement and (ii) Water Movement was slow when the Soil had large clay or small silt or sand contents. When the Soil electric field was weak, the net interaction force of Soil particles was attractive, thus aggregates could not be broken. For this case we found that (i) further increasing the attractive forces of Soil particles could not improve Soil Water Movement and (ii) Water Movement was fast when the Soil had large clay or small silt or sand contents. HIGHLIGHTS: Coupling effects of particle size and particle interactions on Soil Water Movement are not clear. Large clay contents can decrease or increase Soil Water Movement depending on Soil particle interaction forces. Fast Water Movement occurred in Soil with strongly polarized cations and large clay content. Particle interaction forces and particle‐size distribution were strongly coupled in Soil Water Movement.

Hang Li - One of the best experts on this subject based on the ideXlab platform.

  • coupling effects of surface charges adsorbed counterions and particle size distribution on Soil Water infiltration and transport
    European Journal of Soil Science, 2018
    Co-Authors: Y. Gong, Rui Tian, Hang Li
    Abstract:

    Soil pores are the channels for Water transport. The surface charges, the non‐classic polarizabilities and concentrations of the adsorbed counterions in a Soil determine Soil particle interaction forces that affect Soil pore status. Particle‐size distribution is another important factor that affects Soil pore status. Therefore, surface charges, adsorbed counterions and particle‐size distribution would probably be coupled in Soil Water transport. In this study, two Soils with different surface charge densities, different adsorbed counterions and different particle‐size distributions were used to study their coupling effects on Soil Water Movement. The results showed that these factors were strongly coupled in Soil Water Movement. When the Soil electric field strength was strong (depending on surface charges, adsorbed counterion polarizabilities and concentrations), the net interaction forces of Soil particles was repulsive, thus Soil aggregates could be broken. The degree of aggregate breakdown coupled with particle‐size distribution determined Soil Water Movement. For this case we found that (i) increasing attractive forces of Soil particles could greatly improve Soil Water Movement and (ii) Water Movement was slow when the Soil had large clay or small silt or sand contents. When the Soil electric field was weak, the net interaction force of Soil particles was attractive, thus aggregates could not be broken. For this case we found that (i) further increasing the attractive forces of Soil particles could not improve Soil Water Movement and (ii) Water Movement was fast when the Soil had large clay or small silt or sand contents. HIGHLIGHTS: Coupling effects of particle size and particle interactions on Soil Water Movement are not clear. Large clay contents can decrease or increase Soil Water Movement depending on Soil particle interaction forces. Fast Water Movement occurred in Soil with strongly polarized cations and large clay content. Particle interaction forces and particle‐size distribution were strongly coupled in Soil Water Movement.

M. Grimaldi - One of the best experts on this subject based on the ideXlab platform.

  • influence of a hedge surrounding bottomland on seasonal Soil Water Movement
    Hydrological Processes, 2003
    Co-Authors: V. Caubel, C. Grimaldi, P. Merot, M. Grimaldi
    Abstract:

    The influence of a hedge surrounding bottomland on Soil-Water Movement along the hillslope was studied on a plot scale for 28 months. The study was based on the comparison of two transects, one with a hedge, the other without, using mainly a dense grid of tensiometers. The influence of the bottomland hedge was located in the area where tree roots were developed, several metres upslope from the hedge, and could be observed both in the saturated and non-saturated zone, from May to December. The hedge induced a high rate of Soil drying, because of the high evaporative capacity of the trees. We evaluated that Water uptake by the hedge during the growing season was at least 100 mm higher than without a hedge. This increased drying rate led to a delayed rewetting of the Soils upslope from the hedge in autumn, of about 1 month compared with the situation without a hedge. Several consequences of this delayed rewetting are expected: a delay in the return of subsurface transfer from the hillslope to the riparian zone, a buffering effect of hedges on floods, already observed at the catchment scale, and an increased residence time of pollutants. Copyright © 2003 John Wiley & Sons, Ltd.

  • Influence of a hedge surrounding bottomland on seasonal Soil‐Water Movement
    Hydrological Processes, 2003
    Co-Authors: V. Caubel, C. Grimaldi, P. Merot, M. Grimaldi
    Abstract:

    The influence of a hedge surrounding bottomland on Soil-Water Movement along the hillslope was studied on a plot scale for 28 months. The study was based on the comparison of two transects, one with a hedge, the other without, using mainly a dense grid of tensiometers. The influence of the bottomland hedge was located in the area where tree roots were developed, several metres upslope from the hedge, and could be observed both in the saturated and non-saturated zone, from May to December. The hedge induced a high rate of Soil drying, because of the high evaporative capacity of the trees. We evaluated that Water uptake by the hedge during the growing season was at least 100 mm higher than without a hedge. This increased drying rate led to a delayed rewetting of the Soils upslope from the hedge in autumn, of about 1 month compared with the situation without a hedge. Several consequences of this delayed rewetting are expected: a delay in the return of subsurface transfer from the hillslope to the riparian zone, a buffering effect of hedges on floods, already observed at the catchment scale, and an increased residence time of pollutants. Copyright © 2003 John Wiley & Sons, Ltd.

  • Influence of a hedge surrounding bottomland on seasonal Soil-Water Movement
    Hydrological Processes, 2003
    Co-Authors: V. Caubel, C. Grimaldi, P. Merot, M. Grimaldi
    Abstract:

    Influence of a hedge surrounding bottomland on seasonal Soil-Water Movement

P. Merot - One of the best experts on this subject based on the ideXlab platform.

  • Soil Water Movement under a bottomland hedgerow during contrasting meteorological conditions
    Hydrological Processes, 2010
    Co-Authors: Reza Ghazavi, Zahra Thomas, Y. Hamon, P. Merot
    Abstract:

    Linear vegetation structures such as hedge tree networks (hedgerows), shelterbelts, and isolated trees play a major role on Soil Water transfer. Our objective is to evaluate the influence of a bottomland hedgerow on Water flux in the saturated and unsaturated zones. Soil Water Movement was investigated in a hillslope crossed by a hedgerow using total Water-potential gradients and shallow groundWater dynamics. Results of a dry year were presented by Ghazavi et al. (2008). In this study, we analyse a wet year and then compare the two contrasting years (dry and wet). During the 2 years, the Soil located at the vicinity of the hedgerow developed a drier status than the surrounding Soils. Water flux in the unsaturated zone was directed towards the hedgerow for a longer period during the dry year than the wet year. The duration of delayed rewetting of the Soil decreased from 3 months for the dry year to 1 month for the wet year. Variation in Water storage calculated over the study period was highest near the hedgerow and lowest far from the hedgerow. In the hillslope studied, hedgerow and stream proximity controlled Water transfer. It is clear that the hedgerow controlled Water transfer in the unsaturated zone throughout the year, except for the period when the Soil profile was fully saturated. First, hedgerows control Water transfer by increasing lateral transfer, which is related to high Soil Water potential gradients in its vicinity. These processes may increase capillary rise and decrease groundWater recharge near the hedgerow. Second, reverse hydraulic gradient (upward flux of Water) occurred during the period of lowest groundWater level, mainly because of groundWater and stream connectivity. Processes related to hedgerow presence, such as delayed Soil rewetting and flow towards the hedgerow need to be considered to quantify the impact of linear vegetation structures on Water flux. Copyright © 2010 John Wiley & Sons, Ltd.

  • influence of a hedge surrounding bottomland on seasonal Soil Water Movement
    Hydrological Processes, 2003
    Co-Authors: V. Caubel, C. Grimaldi, P. Merot, M. Grimaldi
    Abstract:

    The influence of a hedge surrounding bottomland on Soil-Water Movement along the hillslope was studied on a plot scale for 28 months. The study was based on the comparison of two transects, one with a hedge, the other without, using mainly a dense grid of tensiometers. The influence of the bottomland hedge was located in the area where tree roots were developed, several metres upslope from the hedge, and could be observed both in the saturated and non-saturated zone, from May to December. The hedge induced a high rate of Soil drying, because of the high evaporative capacity of the trees. We evaluated that Water uptake by the hedge during the growing season was at least 100 mm higher than without a hedge. This increased drying rate led to a delayed rewetting of the Soils upslope from the hedge in autumn, of about 1 month compared with the situation without a hedge. Several consequences of this delayed rewetting are expected: a delay in the return of subsurface transfer from the hillslope to the riparian zone, a buffering effect of hedges on floods, already observed at the catchment scale, and an increased residence time of pollutants. Copyright © 2003 John Wiley & Sons, Ltd.

  • Influence of a hedge surrounding bottomland on seasonal Soil‐Water Movement
    Hydrological Processes, 2003
    Co-Authors: V. Caubel, C. Grimaldi, P. Merot, M. Grimaldi
    Abstract:

    The influence of a hedge surrounding bottomland on Soil-Water Movement along the hillslope was studied on a plot scale for 28 months. The study was based on the comparison of two transects, one with a hedge, the other without, using mainly a dense grid of tensiometers. The influence of the bottomland hedge was located in the area where tree roots were developed, several metres upslope from the hedge, and could be observed both in the saturated and non-saturated zone, from May to December. The hedge induced a high rate of Soil drying, because of the high evaporative capacity of the trees. We evaluated that Water uptake by the hedge during the growing season was at least 100 mm higher than without a hedge. This increased drying rate led to a delayed rewetting of the Soils upslope from the hedge in autumn, of about 1 month compared with the situation without a hedge. Several consequences of this delayed rewetting are expected: a delay in the return of subsurface transfer from the hillslope to the riparian zone, a buffering effect of hedges on floods, already observed at the catchment scale, and an increased residence time of pollutants. Copyright © 2003 John Wiley & Sons, Ltd.

  • Influence of a hedge surrounding bottomland on seasonal Soil-Water Movement
    Hydrological Processes, 2003
    Co-Authors: V. Caubel, C. Grimaldi, P. Merot, M. Grimaldi
    Abstract:

    Influence of a hedge surrounding bottomland on seasonal Soil-Water Movement