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Abstract

Mosaic 3-D cascade of parallelepiped-shaped silt blocks, which sandwich sand- lled cracks, has been discovered in the eld and tested in lab experiments. Controlled wetting-drying of these blocks, collected from a dam reservoir, mimics field ponding-desiccation conditions of the topsoil layer subject to caustic solar radiation, high temperature and wind, typical in the Batinah region of Oman. In 1-D analytical modelling of a transient Richards’ equation for vertical evaporation, the method of small perturbations is applied, assuming that the relative permeability is Avery-anov’s 3.5-power function of the moisture content and capillary pressure is a given (measured) function. A linearized advective dispersion equation is solved with respect to the second term in the series expansion of the moisture content as a function of spatial coordinates and time. For a single block of a nite thickness we solve a boundary value problem with a no- ow condition at the bottom and a constant moisture content at the surface. Preliminary comparisons with theta-, TDR- probes measuring the moisture content and temperature at several in-block points are made. Results corroborate that a 3-D heterogeneity of soil physical properties, in particular, horizontal and vertical capillary barriers emerging on the interfaces between silt and sand generate eco-niches with stored soil water compartments favourable for lush vegetation in desert conditions. Desiccation significantly increases the temperature in the blocks and re-wetting of the blocks reduces the daily average and peak temperatures, the latter by almost 15°C. This is important for planning irrigation in smartly designed soil substrates and sustainability of wild plants in the region where the top soil peak temperature in the study area exceeds 70°C in Summer but smartly structured soils maintain lash vegetation. Thee layer of dry top-blocks acts as a thermal insulator for the subjacent layers of wet blocks that may host the root zone of woody species. 

Keywords

Soil capillary barrier soil heterogeneity hydropedology soil moisture content linearized Richards’ equation.

Article Details

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Kacimov, A., Al-Maktoumi, A., Al-Ismaily, S., & Al-Busaidi, H. (2018). Moisture and temperature in a proppant-enveloped silt block of a recharge dam reservoir: Laboratory experiment and 1-D mathematical modelling. Journal of Agricultural and Marine Sciences [JAMS], 22(1), 8–17. Retrieved from https://journals.squ.edu.om/index.php/jams/article/view/2398
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References

  1. Al-Ismaily S.S., Al-Maktoumi A.K., Kacimov A.R., Al-Saqri S.M, Al-Busaidi H.A. and Al-Haddabi, M.H. 2013. A morphed block-crack preferential sedimentation: A smart design and evolution in nature. Hydrological Sciences J., 58 (8): 1779-1788, DOI: 10.1080/02626667.2013.838002
  2. Al-Ismaily, S., Al-Maktoumi, A., Kacimov, A., Al-Saqri, S., and Al-Busaidi, H., 2015. The impact of a recharge dam on the hydropedology of arid zone soils in Oman: anthropogenic formation factor. J. Hydrol. Eng. ASCE, 20(4): 04014053 10.1061/(ASCE)HE.1943-5584.0000886.
  3. Al-Maktoumi, A., Al-Ismaily, S., Kacimov, A., Al-Busaidi, H., Al-Saqri, S., and Al-Haddabi, M., 2014. Soil substrate as a cascade of capillary barriers for conserving water in a desert environment: lessons learned from arid nature. J. Arid Land, 6(6): 690-703, doi: 10.1007/s40333-014-0068-7.
  4. Al-Maktoumi, A., Kacimov, A., Al-Ismaily, S. and Al-Busaidi, H., 2015. Infiltration into two-layered soil: The Green-Ampt and Averyanov models revisited. Transport in Porous Media, 109: 169-193, DOI: 10.1007/s11242-015-0507-8
  5. Al-Saqri S., Al-Maktoumi A., Al-Ismaily S., Kacimov A., and Al-Busaidi H. 2016. Hydropedology and soil evolution in explaining the hydrological properties of recharge dams in arid zone environments. Arabian. J. Geosciences, 9(1): 1-12. DOI: 10.1007/s12517-015-2076-0
  6. Arkhangelskaya, T.A. 2012. Temperature Regime of Complex Soil Cover. Geos Press, Moscow (in Russian).
  7. Assouline, S., Narkis, K., Gherabli, R., Lefort, P. and Prat, M., 2014. Analysis of the impact of surface layer properties on evaporation from porous systems using column experiments and modified definition of characteristic length.Water Resources Research, 50(5), pp.3933-3955.
  8. Clair, S.B. St., and Lynch, J.P. 2010. The opening of Pandora's Box: climate change impacts on soil fertility and crop nutrition in developing countries. Plant Soil, 335: 101–115.
  9. Connolly, R.D., 1998. Modelling effects of soil structure on the water balance of soil–crop systems: a review. Soil and Tillage Research, 48(1), pp.1-19.
  10. Deol, P.K , Heitman, J.L., Amoozegar, A., Ren, T. and Horton, R. 2014. Inception and magnitude of subsurface evaporation for a bare soil with natural surface boundary conditions. Soil Science Society of America J., 78 (5): 1544-1551.
  11. Fehmi, J.S. and Kong, T.M., 2012. Effects of soil type, rainfall, straw mulch, and fertilizer on semi-arid vegetation establishment, growth and diversity.Ecological Engineering, 44, pp.70-77.
  12. Gael, A.G. and Smirnova, L.F. 1999. Sands and Sandy Soils. Geos Press, Moscow (in Russian).
  13. Gardner, W.R. and Fireman, M., 1958. Laboratory studies of evaporation from soil columns in the presence of a water table. Soil Science, 85(5), pp.244-249.
  14. Geng, X. and Boufadel, M.C., 2015. Numerical modeling of water flow and salt transport in bare saline soil subjected to evaporation. Journal of Hydrology, 524, pp.427-438.
  15. Guber, A.K., Rawls, W.j., Shein, E.V., and Pachepsky, Y.A., 2003. Effect of soil aggregate size distribution on water retention. Soil Sci., 168: 223–233.
  16. Hillel, D. and Talpaz, H., 1977. Simulation of soil water dynamics in layered soils. Soil Science, 123(1), pp.54-62.
  17. Kacimov, A., Al-Issai, J., Al-Amri, M., and Al-Balushi, M. 2010. Green-roof project in Oman: capillary siphoning as a novel and thrifty irrigation technique. In Proc. of the 4rd International Conference on Water Resources and Arid Environments, Riyad, Saudi Arabia, 6-8 Dec, 2010, 479-487.
  18. Kacimov A.R., and Brown, G., 2015. A transient phreatic surface mound, evidenced by a strip of vegetation in an earth dam shoulder: the Lembke-Youngs reductionist model revisited. Hydrological Sciences J., 60 (2): 361-378 DOI:10.1080/02626667.2014.913793.
  20. Kacimov, A.R., and Kayumov, I.R. 2002. Viscous flow through straight pore channels. J. Porous Media , 5(3): 199-208.
  21. Khan, A.R., 1988. Assessing the evaporation zone in the bare soil from the soil water flux and soil heat flux measurements. Journal of Agronomy and Crop Science, 161(4), pp.234-237.
  22. Kulabukhova, I.I. and Polubarinova-Kochina, P.Ya. 1959. On transient unsaturated flow in soils. Izv. ANS SSSR, Mekhanika i Mashinostroenie, N2: 57-63 (in Russian).
  24. Lambers, H. Chapin III, F.S. and Pons, T.L., 2008. Plant Physiological Ecology. Springer, New York.
  25. Lehmann, P., and Or, D., 2009. Evaporation and capillary coupling across vertical textural contrasts in porous media. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 80(4): 046318.
  26. Lehmann, P. and Or, D. 2013. Effect of wetness patchiness on evaporation dynamics from drying porous surfaces. Water Resources Research, 49: 8250–8262, doi:10.1002/2013WR013737
  27. Lin, H., Bouma, J., Pachepsky, Y., Western, A., Thompson, J., van Genuchten, R., Vogel, HJ, and Lilly, A. 2006. Hydropedology: Synergistic integration of pedology and hydrology. Water Resources Research. 42 (5): W05301.
  28. Lipiec, J., Doussan, C., Nosalewicz, A., and Kondracka, K., 2013. Effect of drought and heat stresses on plant growth and yield: a review. International Agrophysics. 27(4): 463–477.
  29. Noy-Meir, I. 1973. Desert ecosystems: environment and producers. Annual Review of Ecology and Systematics, 4: 25–51.
  30. Pachepsky, Y.A., Guber, A.K. and Jacques, D., 2005. Temporal persistence in vertical distributions of soil moisture contents. Soil Science Society of America J., 69: 347–352.
  31. Philip, J.R. 1991. Upper bounds on evaporation losses from buried sources. Soil Science Society of America J., 55 (6): 1516-1520.
  32. Physics of Plant Environment. 1963. Ed. By W.R. Van Wijk, North-Holland, Amsterdam.
  33. Polubarinova-Kochina, P.Ya. 1977. Theory of Ground-water Movement. Nauka, Moscow (in Russian).
  34. Porporato, A. and Rodriguez-Iturbe, I. 2002. Ecohydrology—a challenging multidisciplinary research perspective. Hydrological Sciences J., 47 (5): 811–821.
  35. Sawiñski, C B., Witkowska-Walczak, B., Lipiec, J. and . Nosalewicz, A., 2011. Effect of aggregate size on water movement in soils. International Agrophysics. 25: 53-58.
  37. Shein, E.V. and Goncharov, V.M. 2006. Agrophysics. Phoenix, Rostov-on-Don (in Russian).
  39. Warrick, A.W. and Yeh, T.C.J., 1990. One-dimensional, steady vertical flow in a layered soil profile. Advances in water resources, 13(4), pp.207-210.
  40. Warrick, A.W. 2003. Soil Water Dynamics. Oxford University Press, New York.
  41. Wolfram, S. 1991. Mathematica. A System for Doing Mathematics by Computer. Addison-Wesley, Redwood City.
  42. Wuest, S.B. and Schillinger, W.F., 2011. Evaporation from high residue no-till versus tilled fallow in a dry summer climate. Soil Science Society of America Journal, 75(4), pp.1513-1519.
  43. Yang, S. and Lu, T-H. 2012. Study of soil-water characteristic curve using microscopic spherical particle model. Pedosphere, 22(1): 103–111.
  45. Youngs, E.G., and Kacimov, A.R. 2007. Conduction through spherical particles at low liquid сontent. International J. Heat and Mass Transfer, 50 (1-2): 292-302.
  46. Willis, W.O., 1960. Evaporation from layered soils in the presence of a water table. Soil Science Society of America Journal, 24(4), pp.239-242.
  47. Zhu, J. and Warrick, A.W. 2012. Unsaturated hydraulic conductivity of repeatedly layered soil structures. Soil Science Society of America J., 76 (1): 28-35.