@misc{10481/104865,
year = {2025},
month = {6},
url = {https://hdl.handle.net/10481/104865},
abstract = {This review provides a comprehensive overview of the closed-form expressions developed
for estimating the soil water retention curve (SWRC) from 1964 to the present. Since
the concept of the SWRC was introduced in 1907, numerous closed-form functions have
been proposed to describe the relationship between soil matric suction and volumetric
water content, each with distinct strengths and limitations. Given the variability in SWRC
shapes influenced by soil texture, structure, and organic matter, models in the form of
sigmoidal, multi-exponential, lognormal, hyperbolic, and hybrid functions have been
designed to fit experimental SWRC data. Based on the number of adjustable parameters,
these models are categorized into three main groups: three-, four-, and five-parameter
models. They can also be classified as one-, two-, or three-segment functions depending
on their structural complexity. A review of the developed models indicates that most are
effective in representing the SWRC between the residual and saturated water content range.
To capture the full range of the SWRC, hybrid functions have been proposed by combining
traditional models. This review presents and discusses these models in chronological order
of publication.},
organization = {University of Mohaghegh Ardabili},
publisher = {MDPI},
keywords = {soil matric potential},
keywords = {soil matric suction},
keywords = {volumetric water content},
keywords = {closed-form functions},
keywords = {SWRC models},
title = {Half-Century Review and Advances in Closed-Form Functions for Estimating Soil Water Retention Curves},
doi = {10.3390/hydrology12070164},
author = {Rasoulzadeh, Ali and Bezaatpour, Javad and Mobaser, Javanshir Azizi and Fernández Gálvez, Jesús},
}