The purpose of this study was to assess the transport of the herbicide bentazone [3-(1-methylethyl)-1H-2,1,3-benzothiadiazin-4(3H)one 2,2-dioxide] in three contrasting tile-drained cultivated field soils subject to otherwise similar experimental conditions. Observed drain discharge rates and chemical concentrations in the drainage water reflected the different transport processes at the three s...

methods, intensive efforts have been undertaken to supplement the scarcity of hydrogeological data with densely We combine electromagnetic inversion of ground penetrating radar sampled geophysical data (Beres and Haeni, 1991; Ru(GPR) signals with hydrodynamic inverse modeling to identify the effective soil hydraulic properties of a sand in laboratory conditions. bin et al., 1992; Hubbard et al....

Dike construction has been widely used because of its potential to protect people and properties from overtopping flows. Water levels may exceed a dike crest cause flow during high river discharge. This phenomenon caused serious damage the body due reduction soil shear strength. The increase water content within particles relationship with development breach channel failure in downstream upstre...

Um substrato com porosidade e capacidade de retenção água adequadas possibilita maximizar a produtividade qualidade das culturas produzidas em recipientes sob ambiente protegido. A fibra coco é uma ótima alternativa, mas requer manejo cuidadoso da irrigação, podendo ser baseado no monitoramento do teor na zona radicular usando tensiômetros. Nesse sentido, objetivou-se este trabalho determinar c...

Modeling of the land surface water-, energy-, and carbon balance provides insight into behavior Earth System, under current future conditions. Currently, there exists a substantial variability between model outputs, for range types, whereby differences input parameters could be an important reason. For large-scale surface, hydrological, crop models, soil hydraulic properties (SHP) are required ...

Commonly used soil water retention, θ(h), and moisture capacity, C(h), functions implicitly assume that: i) the θ(h) data curve is sigmoid-shaped with an inflection; ii) C(h) has a value of zero at saturation. Desorption measurements on intact soils indicate, however, that frequently convex-monotonic in shape no inflection, saturation often finite negative rather than zero. As these model-data ...

Research on the infiltration characteristics of surface water is fundamental for understanding entire hydrological process. Therefore, studying process sandstone slopes overlaid with loess and predicting soil moisture content are great importance investigating processes controlling erosion in hilly gully areas Loess Plateau China. This study mainly focuses simulation vertical movement patterns ...

Current databases of soil hydraulic properties (SHPs) have typically been used to develop pedotransfer functions (PTFs) estimate water retention [?(h)] assuming a unimodal pore-size distribution. However, natural soils often show the presence bimodal multimodal distributions. Here, we three widely spread for PTF development: UNsaturated SOil DAtabase (UNSODA) 2.0, Vereecken, and European hydrop...

We present a synthetic hydraulic analysis of the propagation oscillatory perturbations in two-dimensional saturated zone bounded above by capillary fringe. Unsaturated flows are simulated physical model using hysteretic form Richards' equation parameterized van Genuchten water retention curve and Mualem conductivity for sand, loam, intermediate soil. Soil type affects periodic responses as func...

Abstract A benchtop humidity and temperature chamber was used to assess water vapor sorption in four US shale samples at 90 °C. Water isotherms were measured relative ranging from 10 99% of Shale fractal properties then evaluated, capillary pressure (ranging 1.70 386 MPa) obtained using Kelvin relationship. The results show that Mancos shale, the US, adsorbed more absorbed due its high clay con...