scholarly journals Transferability of continuous- and class-pedotransfer functions to predict water retention properties of semiarid Syrian soils

2018 ◽  
Vol 34 (3) ◽  
pp. 354-369
Author(s):  
H. Al Majou ◽  
B. Hassani ◽  
A. Bruand
Keyword(s):  
Water Retention ◽  
Pedotransfer Functions ◽  
Water Retention Properties

Development of class pedotransfer functions for integrating water retention properties into Portuguese soil maps

Soil Research ◽  
2013 ◽  
Vol 51 (4) ◽  
pp. 262 ◽  
Author(s):  
T. B. Ramos ◽  
M. C. Gonçalves ◽  
D. Brito ◽  
J. C. Martins ◽  
L. S. Pereira
Keyword(s):  
Water Balance ◽  
Bulk Density ◽  
Water Retention ◽  
Swat Model ◽  
Pedotransfer Functions ◽  
Soil Horizon ◽  
Soil Maps ◽  
Catchment Scale ◽  
Small Catchment ◽  
Water Retention Properties

Hydrological modellers have recently been challenged to improve watershed models by better integrating soil information into model applications. Reliable soil hydraulic information is thus necessary for better describing the water balance components at the catchment scale. Frequently, that information does not exist. This study presents a set of class-pedotransfer functions (PTFs) for estimating the water retention properties of Portuguese soils. The class-PTFs were established from a dataset containing 697 soil horizons/layers, by averaging values of total porosity and volumetric water contents at –0.25, –1, –3.2, –6.3, –10, –33, –100, –250, and –1500 kPa matric potentials after grouping data by soil texture class, soil horizon, and bulk density. Fitted retention curves using the van Genuchten model were also obtained for every class-PTF. The root mean square error varied between 0.039 and 0.057 cm3/cm3, with smaller values found when using the 12 texture classes of the International Soil Science Society (ISSS) system rather than the five texture classes of FAO, and when bulk density was also considered. The class-PTFs were then integrated into Portuguese soil maps and its usage was demonstrated by deriving maps of available water capacity to be used for modelling the water balance in a small catchment area with the SWAT model. The model successfully simulated the reservoir inflow when using the derived maps, but the results did not vary much whether using coarser or finer description of the catchment soils. Nonetheless, the class-PTFs contributed to a better soil characterisation than when using coarse-scaled information. The approach followed here was simple, inexpensive, and feasible for modellers with few resources but interested in considering the spatial variability of soil retention properties at large scales and in advancing hydrologic modelling in Portugal.

Pedotransfer functions for estimating soil water retention properties of northern China agricultural soils: Development and needs*

2021 ◽  
Author(s):  
Xu Xu ◽  
Huawei Li ◽  
Chen Sun ◽  
Tiago B. Ramos ◽  
Hanaa Darouich ◽  
...  
Keyword(s):  
Soil Water ◽  
Water Retention ◽  
Agricultural Soils ◽  
Northern China ◽  
Pedotransfer Functions ◽  
Soil Water Retention ◽  
Water Retention Properties

scholarly journals Variation of the water-retention properties of soils: Validity of class-pedotransfer functions

2007 ◽  
Vol 339 (9) ◽  
pp. 632-639 ◽  
Author(s):  
Hassan Al Majou ◽  
Ary Bruand ◽  
Odile Duval ◽  
Isabelle Cousin
Keyword(s):  
Water Retention ◽  
Pedotransfer Functions ◽  
Water Retention Properties

scholarly journals Carboxylated nanocellulose superabsorbent: Biodegradation and soil water retention properties

2021 ◽  
pp. 51495
Author(s):  
Ruth M. Barajas‐Ledesma ◽  
Vanessa N. L. Wong ◽  
Karen Little ◽  
Antonio F. Patti ◽  
Gil Garnier
Keyword(s):  
Soil Water ◽  
Water Retention ◽  
Soil Water Retention ◽  
Water Retention Properties

scholarly journals Applications of Hyaluronic Acid in Ophthalmology and Contact Lenses

Molecules ◽  
2021 ◽  
Vol 26 (9) ◽  
pp. 2485
Author(s):  
Wan-Hsin Chang ◽  
Pei-Yi Liu ◽  
Min-Hsuan Lin ◽  
Chien-Ju Lu ◽  
Hsuan-Yi Chou ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Dry Eye ◽  
Water Retention ◽  
Contact Lenses ◽  
Anterior Segment ◽  
Vitreous Body ◽  
Material Surface ◽  
Connective Tissues ◽  
Water Retention Properties ◽  
Bull's Eye

Hyaluronic acid (HA) is a glycosaminoglycan that was first isolated and identified from the vitreous body of a bull’s eye. HA is ubiquitous in the soft connective tissues of animals and therefore has high tissue compatibility for use in medication. Because of HA’s biological safety and water retention properties, it has many ophthalmology-related applications, such as in intravitreal injection, dry eye treatment, and contact lenses. Due to its broad range of applications, the identification and quantification of HA is a critical topic. This review article discusses current methods for analyzing HA. Contact lenses have become a widely used medical device, with HA commonly used as an additive to their production material, surface coating, and multipurpose solution. HA molecules on contact lenses retain moisture and increase the wearer’s comfort. HA absorbed by contact lenses can also gradually release to the anterior segment of the eyes to treat dry eye. This review discusses applications of HA in ophthalmology.

Soil wetting-drying and water-retention properties in a mine-soil treated with composted and thermally-dried sludges

2011 ◽  
Vol 62 (5) ◽  
pp. 696-708 ◽  
Author(s):  
G. Ojeda ◽  
S. Mattana ◽  
M. Bonmatí ◽  
S. K. Woche ◽  
J. Bachmann
Keyword(s):  
Water Retention ◽  
Mine Soil ◽  
Soil Wetting ◽  
Water Retention Properties

Influence of temperature on the water retention properties of compacted GMZ01 bentonite

2014 ◽  
Vol 73 (8) ◽  
pp. 4053-4061 ◽  
Author(s):  
M. Wan ◽  
W. M. Ye ◽  
Y. G. Chen ◽  
Y. J. Cui ◽  
J. Wang
Keyword(s):  
Water Retention ◽  
Influence Of Temperature ◽  
Gmz01 Bentonite ◽  
Influence Of Temperature On ◽  
Water Retention Properties

scholarly journals Assessment of pedotransfer functions for estimating soil water retention curves for the amazon region

2014 ◽  
Vol 38 (3) ◽  
pp. 730-743 ◽  
Author(s):  
João Carlos Medeiros ◽  
Miguel Cooper ◽  
Jaqueline Dalla Rosa ◽  
Michel Grimaldi ◽  
Yves Coquet
Keyword(s):  
Soil Water ◽  
Water Retention ◽  
Soil Layer ◽  
Direct Determination ◽  
Exchange Capacity ◽  
Pedotransfer Functions ◽  
Water Retention Curve ◽  
Spatial And Temporal Variability ◽  
Soil Water Retention Curve ◽  
Soil Water Retention

Knowledge of the soil water retention curve (SWRC) is essential for understanding and modeling hydraulic processes in the soil. However, direct determination of the SWRC is time consuming and costly. In addition, it requires a large number of samples, due to the high spatial and temporal variability of soil hydraulic properties. An alternative is the use of models, called pedotransfer functions (PTFs), which estimate the SWRC from easy-to-measure properties. The aim of this paper was to test the accuracy of 16 point or parametric PTFs reported in the literature on different soils from the south and southeast of the State of Pará, Brazil. The PTFs tested were proposed by Pidgeon (1972), Lal (1979), Aina & Periaswamy (1985), Arruda et al. (1987), Dijkerman (1988), Vereecken et al. (1989), Batjes (1996), van den Berg et al. (1997), Tomasella et al. (2000), Hodnett & Tomasella (2002), Oliveira et al. (2002), and Barros (2010). We used a database that includes soil texture (sand, silt, and clay), bulk density, soil organic carbon, soil pH, cation exchange capacity, and the SWRC. Most of the PTFs tested did not show good performance in estimating the SWRC. The parametric PTFs, however, performed better than the point PTFs in assessing the SWRC in the tested region. Among the parametric PTFs, those proposed by Tomasella et al. (2000) achieved the best accuracy in estimating the empirical parameters of the van Genuchten (1980) model, especially when tested in the top soil layer.

Multiscale Pedotransfer Functions for Soil Water Retention

2007 ◽  
Vol 6 (4) ◽  
pp. 868-878 ◽  
Author(s):  
Raghavendra B. Jana ◽  
Binayak P. Mohanty ◽  
Everett P. Springer
Keyword(s):  
Soil Water ◽  
Water Retention ◽  
Pedotransfer Functions ◽  
Soil Water Retention
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