The soil water retention curve (SWRC) is essential for assessing flow and solute transport in unsaturated media. van Genuchten (VG) model widely used to describe the SWRC; however, estimation of its effective hydraulic parameters often prone error, especially when data exist only a limited range matric potential. We developed Metropolis-Hastings algorithm Markov chain Monte Carlo (MH-MCMC) appr...

Early stochastic studies focused on steady-state, gravity-dominated unsaturated flow in unbounded domains In this study, on the basis of the van Genuchten–Mualem constitu(e.g., Yeh et al., 1985a,b; Russo, 1993, 1995a,b; Yang et tive relationship, we develop a general nonstationary stochastic model for transient, variably saturated flow in randomly heterogeneous meal., 1996; Zhang et al., 1998; ...

In order to study the strength characteristics of alluvial silt in lower Yellow River Channel at Luokou, Jinan, by varying moisture content five times, direct shear tests were conducted and soil–water curves obtained explore relationships between matric suction as well bishop coefficient strength. The curve test shows that water retention samples can be fitted VG (Van Genuchten) model with appr...

Undisturbed peatlands are effective carbon sinks and provide a variety of ecosystem services. However, anthropogenic disturbances, especially land drainage, strongly alter peat soil properties jeopardize the benefits peatlands. The effects disturbances should therefore be assessed predicted. To support accurate modeling, this study determined physical hydraulic intact disturbed samples collecte...

Loess is very widely distributed, and the unsaturated hydraulic conductivity of loess related to many engineering issues. To determine remoulded more conveniently at a lower cost, filter paper test soil column seepage were carried out. The results indicate that in one-dimensional process, increases with increase volumetric water content, as time continues, from top depth 40 cm gradually becomes...

Several studies focus on the characteristic curve of soil, which plays a fundamental role in mechanics unsaturated soils and is also an important indicator physical quality. Therefore, objective this research was to determine soil by methods Filter Paper, Richards Pressure Chamber, Haines Funnel erodible slope Metropolitan Region Recife, state Pernambuco, Brazil. The curves were designed models...