Results 111 to 120 of about 922,701 (227)

Reducing drought vulnerability of forest soils using Xanthan gum-based soil conditioners

open access: yesHeliyon
Climate change increases the frequency and severity of droughts in many parts of Europe, thereby affecting the availability of water resources. Therefore, preserving the soil water content is essential for maintaining forest diversity and plant vitality.
Jasna Smolar   +6 more
doaj   +1 more source

Soil amendment effects on field‐saturated and unsaturated hydraulic properties of sodic soils

open access: yesAgrosystems, Geosciences & Environment
Soil sodicity degrades soil structure and restricts water movement by promoting clay swelling, dispersion, and surface sealing, thereby reducing infiltration and hydraulic conductivity.
Tejinder Singh   +6 more
doaj   +1 more source

DETERMINATION OF THE HYDRAULIC CONDUCTIVITY AND WATER DIFFUSIVITY IN UNSATURATED SOILS 1, THEORY

open access: yesShuitu baochi yanjiu, 1991
Three simple equations for the relatioships beLween the water content at wetting front and the average water content in the wetting zone, during the redistributions of soil water in unsaturated soils both vertically and horizontally, are described in ...
Shao Mingan
doaj  

The Role of Material Structure in Compacted Earthen Building Materials: Implications for Design and Construction [PDF]

open access: yes, 2011
Rammed earth is an earthen construction material and an ancient construction technique. It is formed by compacting layers of moist sandy loam subsoil into formwork which is then removed, exposing the material and creating a freestanding, monolithic ...
BECKETT, CHRISTOPHER,THOMAS,STONE   +1 more
core  

Non-Gaussian effects on hydraulic conductivity upscaling in unsaturated porous media via direct averaging [PDF]

open access: yes, 2019
Hydraulic conductivity is a key parameter governing groundwater flow processes. In this work, hydraulic conductivity was upscaled with the objective of assessing the optimal value of the p-power parameter (of the power averaging upscaling approach) that
Sandoval Pabon, Rafael Leonardo
core  

Hysteretic seepage analysis in unsaturated soil covers

open access: yes, 2012
This paper aims to study numerically the effect of hysteresis on the hydraulic behaviour of unsaturated soil covers. The Richards equation is coupled with the hysteretic soil water retention curve (SWRC), to describe the flow in unsaturated soils.
Sheng, Daichao   +2 more
core  

PREDICTING THE HYDRAULIC CONDUCTIVITY AND WATER DIFFUSIVITY OF UNSATURATED SOILS FROM THE SOIL WATER CHARAGTERISTIG CURVES

open access: yesShuitu baochi yanjiu, 1991
A relatively simple equation for the soil-water charateristic curve, power function, is described in this paper. The particular form of the equation enables one to derive analytical expressions for the relative hydraulic conductivity, when substituted in
Shao Mingan Li Kaiyuan Zhong Liangping
doaj  

Numerical Simulation of Unsaturated Flow in Single Fracture Considering the Water Exchange Between Fracture and Matrix

open access: yes工程科学与技术, 2012
:In order to study the hydraulic characteristics of unsaturated flow in single fracture, a method for generating the distribution of fracture aperture using Weierstrass-Mandelbrot function was proposed according to fractal dimension,dislocation value and
doaj  

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