搜索结果: 1-15 共查到“水文物理学 transport”相关记录17条 . 查询时间(0.039 秒)
Assessment of Spatial Patterns of Sediment Transport and Delivery for Soil and Water Conservation Programs
off-site soil erosion soil erosion deposition model
2015/8/14
Soil erosion has tremendous impacts on most river systems throughout the United States. Such non-point pollution results from land-use and agricultural practices and leads to sedimentation downstream,...
Numerical Modelling of Contaminant Transport Hydrodynamics
runoff contamination environment
2015/1/8
Modelling of contaminant transport on watersheds is a problem of concern with regard to the protection of water ecosystems. This paper presents a numerical model, using the finite element method, to s...
Fuzzy rule-based model for contaminant transport in a natural river channel
Fuzzy rule-based model contaminant transport natural river channel
2009/12/4
Fuzzy rules are used to model solute dispersion in a river dead zone, such that the turbulent diffusion is determined by a fuzzy inference system which relates the local mean velocity shear to the lon...
Dynamic identifiability analysis of the transient storage model for solute transport in rivers
Dynamic identifiability analysis transient storage model solute transport
2009/12/4
The use of dynamic mathematical models to simulate the behaviour of environmental systems is common practice. However, the output of these models remains uncertain, despite their widespread use and lo...
A Sediment Transport Model for Straight Alluvial Channels
Sediment Transport Model Straight Alluvial Channels
2009/10/29
The paper presents a simple mathematical model for sediment transport in
straight alluvial channels. The model, which is based on physical ideas related to
those introduced by Bagnold (1954), was or...
A Modified Sediment Transport Model for Natural Streams
Modified Sediment Transport Model Natural Streams
2009/10/28
In an earlier investigation of the behaviour of tracer particles for determination
of bed load transport in an alluvial stream (Thomsen 1080), specific
records were taken of the particle velocities ...
Laboratory Experiments on Solute Transport in Non-Homogeneous Porous Media
Laboratory Experiments Solute Transport Non-Homogeneous Porous Media
2009/10/27
Solute transport in groundwater is a process which has become of major importance
during the last decades due to increasing contamination of ground
water. This process usually occurs in a medium het...
The Effect of Heterogeneity on Large Scale Solute Transport in the Unsaturated Zone
Effect of Heterogeneity Large Scale Solute Transport Unsaturated Zone
2009/10/27
The effect of natural heterogeneity on large scale solute transport in the unsaturated
zone is investigated using stochastic methods. Several of the physical
parameters that control flow and solute ...
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...
Saltation Layer of Particles in Water Flows Related to Transport Stage
Saltation Layer Water Flows Transport Stage
2009/10/22
A theoretical model has been developed to determine the maximum saltation
layer thickness of sediment particles in water associated with the migration
velocity of particle in the bed layer. This is ...
Comparison of three stream tube models predicting field-scale solute transport
convective lognormat transfer stochastic stream tube solute transport
2009/6/8
In this paper the relation between local- and field-scale solute transport parameters in an unsaturated soil profile is investigated. At two experimental sites, local-scale steady-state solute transp...
Preferential transport of water and 131Iodide in a clay loam assessed with TDR-techniques and boundary-layer flow theory
clay loam soil moisture variations boundary-layer flow
2009/6/8
Rapid soil moisture variations were measured with TDR equipment at five depths ranging from 0.1 to 0.9 m during five consecutive infiltration experiments under ponding. Each time, 27 mm of water were ...
Field scale variability of solute transport parameters and related soil properties
convective-dispersive equation mobility index breakthrough curves
2009/6/8
The spatial variability of transport parameters has to be taken into account for a reliable assessment of solute behaviour in natural field soils. Two field sites were studied by collecting 24 and 36 ...
The dominant role of structure for solute transport in soil：experimental evidence and modelling of structure and transport in a field experiment
soil field experiment solute transport
2009/5/13
A classical transport experiment was performed in a field plot of 2.5 m2 using the dye tracer brilliant blue. The measured tracer distribution demonstrates the dominant role of the heterogeneous soil ...