搜索结果: 1-12 共查到“水文物理学 soils”相关记录12条 . 查询时间(0.062 秒)
Polymer tensiometers with ceramic cones: direct observations of matric pressures in drying soils
Polymer tensiometers ceramic cones drying soils
2010/12/22
Measuring soil water potentials is crucial to characterize vadose zone processes. Conventional tensiometers only measure until approximately −0.09 MPa, and indirect methods may suffer from the n...
Characterizing water fingering phenomena in soils using magnetic resonance imaging and multifractal theory
water fingering phenomena magnetic resonance imaging multifractal theory
2009/10/30
The study of water movement in soils is of fundamental importance in hydrologic science. It is generally accepted that in most soils, water and solutes flow through unsaturated zones via preferential ...
Unsaturated Hydraulic Conductivity Determined by the Hot Air Method for Some Danish Till Soils
Hydraulic Conductivity Hot Air Method Danish Till Soils
2009/10/27
Unsaturated hydraulic conductivity relations for topsoil and subsoil in 12 Danish
till soils were obtained from measurements by the hot air method. In the
range of pressure potentials (pF-values fro...
Spatial Variability of Physical Parameters and Processes in Two Field Soils Part II:Water Flow at Field Scale
Spatial Variability Physical Parameters Two Field Soils Field Scale
2009/10/26
The horizontal variability of soil hydraulic parameters, water content and suction
mcasurcd within two research ficlds in Denmark is analyzed and discussed.
A numerical analysis of the flow in the t...
Spatial Variability of Physical Parameters and Processes in Two Field Soils Part I:Water Flow and Solute Transport at Local Scale
Spatial Variability Physical Parameters Two Field Soils Local Scale
2009/10/26
Natural field systems exhibit a large degree of soil heterogeneity which affects
the movement of water and solutes and thus leads to highly varying observations
of water contcnt and solute concentra...
Spatial Variability of Physical Parameters and Processes in Two Field Soils Part Ill:Solute Transport at Field Scale
Spatial Variability Physical Parameters Two Field Soils Field Scale
2009/10/26
A numerical analysis of solute transport in two spatially heterogeneous fields is
carried out assuming that the fields are composed of ensembles of one-dimensional
non-interacting soil columns, each...
Frost Heave due to Ice Lens Formation in Freezing Soils 2.Field Application
Frost Heave Ice Lens Formation Freezing Soils Field Application
2009/10/26
An operational model for estimation of frost heave in field where stratified soil
profile appears is presented. The model is developed from the research model
described in part B. Soil layers are fi...
Frost Heave due to Ice Lens Formation in Freezing Soils 1.Theory and Verification
Frost Heave Ice Lens Formation Freezing Soils Theory and Verification
2009/10/26
A frost heave model which simulates formation of ice lenses is developed for
saturated salt-free soils. Quasi-steady state heat and mass flow is considered.
Special attention is paid to the transmit...
MODELING OF CHEMICAL AND ELECTRICAL FLOWS IN LOW PERMEABILITY SOILS UNDER ELECTRICAL GRADIENT
ELECTRICAL FLOWS LOW PERMEABILITY SOILS CHEMICAL ELECTRICAL GRADIENT
2009/10/19
If an electrical gradient is imposed on wet fine-grained soil, contaminant transport occurs by a complex phenomenon called electrokinetics. Even though electrokinetics has been proven to be feasible i...
Significance of tree roots for preferential infiltration in stagnic soils
tree roots stagnic soils preferential infiltration
2009/10/10
It is generally recognized that roots have an effect on infiltration. In this study we analysed the relation between root length distributions from Norway spruce (Picea abies (L.) Karst), silver fir (...
Critical loads for soils and freshwaters：a comparison methods at the Plynlimon catchments
Critical loads freshwaters Plynlimon catchments soils
2009/6/8
International agreements aimed at reducing sulphur deposition from the atmosphere are now focused on the "critical loads" concept. This provides a distributed link between sources and receptors of aci...
Simulation of the long-term carbon and nitrogen dynamics in Dutch forest soils under Scots pine
long-term carbon Dutch forest soils nitrogen dynamics Scots pine
2009/6/5
Dynamics of C and N in forest soils in the Nutrient Cycling and Soil Acidification Model (NUCSAM) are described by the transformation and decomposition of three organic matter compartments, litter, fe...