The water retention curve (WRC) of arable soils from the southeastern United States at different levels compaction (no compaction, and 10 20% increases in soil bulk density) was estimated using van Genuchten–Mualem (VG) model. VG parameters noncompacted were obtained first by fitting measured hydraulic data. To construct WRC compacted soils, gravimetric values permanent wilting point (?gw, 1,50...

Soil hydraulic properties, which are basically saturated and unsaturated conductivity water retention characteristics, remarkably control the main hydrological processes in catchments. Thus, adequate parameterization of soils is one most important tasks physically based catchment modeling. To estimate these choice PTFs a model often made without taking runoff characteristics into consideration....

ity and the van Genuchten . In this study, we apply this approach to measurements of wetting front advance Inverse methods to obtain soil hydraulic parameters are becoming made under simulated field conditions. increasingly popular, due to their more rapid, complete, and robust estimations of hydraulic parameters compared with traditional direct Standard methods typically determine the hydrauli...

Inverse optimization of parameters offers an economical means to infer soil hydraulic properties from in situ measurements of infiltration. We evaluated optimization strategies to inversely estimate soil hydraulic parameters using field measured tension disc infiltrometer data. We estimated the parameters n, , and Ks of the van Genuchten-Mualem (VGM) model, and a piecewise representation of con...

is often still limited by the ill-posedness of the problem being considered. Ill-posedness in general is affected Inverse methods are increasingly used to estimate the hydraulic by nonoptimal experimental design, poor measurement properties of unsaturated soils. The method generally uses a weighted least-squares approach in which numerically simulated data are fitted quality, errors in the assu...

Stony soils have been increasingly used for agriculture production; however, little is known about their hydraulic properties due to problems, such as sample deformation and continuity between samples suction devices when the sampling measurements are accomplished with traditional techniques. In this study, ring technique was replaced by of undisturbed soil blocks coated paraffin wax preserve s...

A wetting soil water characteristic curve (SWCC w ) is necessary for understanding and interpreting the re-distribution of infiltrated rainwater, percolation rate, contaminant transport. Direct determination SWCC tedious needs destructive sampling invasive sensor installation. This study demonstrates an indirect method determining based on infiltration measurements using a mini disc infiltromet...

This paper aimed to study the soil–water characteristics and stability evolution law of rainfall-induced landslide. Taking two landslide events in Siwan village as an example, formation conditions disaster were analyzed. Additionally, deformation destruction mechanisms landslides discussed in-depth. The hydraulic conductivity analyzed based on TRIM experiment results. Geo-Studio numerical softw...

The unsaturated fractured volcanic deposits at Yucca Mountain in Nevada, USA, have been intensively investigated as a possible repository site for storing highlevel radioactive waste. Field studies at the site have revealed that there exist large variabilities in hydrological parameters over the spatial domain of the mountain. Systematic analyses of hydrological parameters using a site-scale th...