Characterizing physical and hydraulic properties of soils in Al-Ahsa, Kingdom of Saudi Arabia

Al-Saeedi, Abdullah Hassan

doi:10.1016/j.sjbs.2022.01.061

Cited by 6 publications

(10 citation statements)

References 58 publications

(89 reference statements)

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“…Fig 5 , a density variation is correlated with the amount of sand and silt [ 42 ]. Areas with sandy texture soils, the northeastern corner and the southwest near Taraf, are characterized by densities ranging from 1.51 to 1.55 gm.cm −3 .…”

Section: Resultsmentioning

confidence: 99%

“…A highly positive correlation of θ s with the percentage of clay and silt is observed, which agrees with many other studies [ 52 , 54 , 55 ]. θ s is generally low in oasis soils due to the dominant content of sand combined with rare clay [ 36 , 42 ].…”

Section: Resultsmentioning

confidence: 99%

“…Soil texture (percent sand, silt, and clay) was determined following the standard method of the hydrometer [ 41 ]. Soil bulk density ( ρ ) was determined using the well-tested local statistical equation ( Eq 1 ) developed by Al-Saeedi (2022) [ 42 ] based on the percentage of silt.…”

Section: Methodsmentioning

confidence: 99%

“…This study addresses the major soil hydraulic properties. Soil water characteristics curve fitting parameters based on an earlier work developed a parametric logistic regression equation (PL4) ( Eq 1 ) and local pedotransfer functions (PTFs) to predict soil moisture at any point of soil retention started from saturation θ s , field capacity FC, and wilting point WP (Eqs 2 – 8 ) [ 42 ]. The results provided excellent fitting and statistical significance [ 42 ].…”

Section: Methodsmentioning

confidence: 99%

“…Soil water characteristics curve fitting parameters based on an earlier work developed a parametric logistic regression equation (PL4) ( Eq 1 ) and local pedotransfer functions (PTFs) to predict soil moisture at any point of soil retention started from saturation θ s , field capacity FC, and wilting point WP (Eqs 2 – 8 ) [ 42 ]. The results provided excellent fitting and statistical significance [ 42 ]. The moisture content θ at any soil potential ψ is written as: where a , b , c , and d are statistical fitting parameters; a is the maximum value on the y -axis or estimated moisture (θ) at zero suction (pF scale), which equals θ s .…”

Section: Methodsmentioning

confidence: 99%

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Using a pedotransfer (PTF) model to establish GIS-based maps for the main physical and hydraulic soil properties in the eastern region of the Al-Ahsa Oasis, Saudi Arabia

Al-Saeedi

2022

PLoS ONE

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This study aims to produce digital maps showing the physical and hydraulic soil properties of the Al-Ahsa Oasis in Saudi Arabia by employing the capabilities of the GIS technique. These maps can display the pattern distribution of different physical and hydraulic properties of soil accurately and accessibly. Recently developed local pedotransfer function (PTF) models were applied to the basic soil data of earlier research covering 566 points. An analysis was conducted using a spatial interpolation technique of the GIS program. Maps of spatial patterns described essential soil physical and hydraulic properties such as sand%, silt%, clay%, bulk density (ρ), saturation (θs), field capacity (FC), wilting point (WP), and soil water characteristic curve (SWCC) fitting parameters b, c, d. Sand dominates most of the study area, particularly in the northeast near Hufof. This may be attributed to the deposition of drifting sand and dune movement. Silt and clay increased in other locations. Bulk density ρ was positively increased with sand and negatively with silt and CaCO3 content. Soil hydraulic properties (θ, FC, WP, and SWCC fitting parameters b, c, d) were positively correlated with silt and ρ and negatively with sand content. This digital map can be employed for a general overview investigation, for the whole studied area, for agricultural expansion and for environmental studies.

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Section: Resultsmentioning

confidence: 99%