Soil Physics with Hydrus Modeling and Applications

ISBN-10: 142007380X
ISBN-13: 9781420073805
Edition: 2010
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Description: One of the most advanced and popular numerical computer models used in the field of soil physics, the HYDRUS series is used for the analysis of water flow and solute transport in variably saturated porous media. Co-authored by the software’s  More...

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Book details

List price: $125.95
Copyright year: 2010
Publisher: CRC Press LLC
Publication date: 5/21/2010
Binding: Hardcover
Pages: 388
Size: 6.25" wide x 9.25" long x 1.00" tall
Weight: 1.430
Language: English

One of the most advanced and popular numerical computer models used in the field of soil physics, the HYDRUS series is used for the analysis of water flow and solute transport in variably saturated porous media. Co-authored by the software’s creator, Dr. Jirka Simunek, this volume demonstrates two-and three- dimensional simulations and computer animations of numerical models using the software. Classroom-tested at the University of Georgia, this volume includes numerous examples and homework problems. It provides students with access to the base HYDRUS program as well as the Rosetta Database, which contains large volumes of information on the hydraulic properties of soils.

Preface
Soil Solid Phase
Introduction
Soil Phases
Soil Texture
Soil Mineralogy
Soil Structure
Summary
Derivations
Problems
Soil Water Content and Potential
Introduction
Energy and Work
Properties of Bulk Water
Properties of Water at Air and Solid Interfaces
Soil Water Content
Measuring Soil Water Content
Gravimetric Methods
Time Domain Reflectometry
Neutron Thermalization
Capacitance Devices
Soil Water Potential
Gravitational Component
Hydrostatic Component
Solute Component
Matric Component
Air Pressure Component
Total Soil Water Potential
Measuring Soil Water Potential Components
Tensiometers
Piezometers
Thermocouple Psychrometers
Heat Dissipation Sensors
Electrical Resistance Sensors
Tension Plates and Pressure Chambers
Tension Plates
Pressure Chambers
Pressure Chambers with Disturbed Samples
The Soil Water Retention Curve
Texture and Structure Effects
Plant Available Water
Hysteresis in the Soil Water Retention Curve
Soil Water Retention Curve Equations
RETC Program
Summary
Derivations
Capillary Rise Law
Hydraulic Capacity Function for van Genuchten Equation
Problems
Steady Water Flow in Soils
Introduction
Steady Flow in Saturated Soil
Poiseuille Equation
Darcy Equation
Saturated Flow Parameters
Flow Perpendicular to Layers
Flow Parallel to Layers
Flow to a Drain
Steady Flow in Unsaturated Soil
Buckingham-Darcy Equation
Unsaturated Hydraulic Conductivity
Macroscopic Capillary Length
Analytical Solutions for Steady Flow
Infiltration to a Water Table
Infiltration from a Ring
Infiltration from a Borehole
Measurements of Hydraulic Properties
Laboratory Methods
Field Methods
Pedotransfer Functions
Summary
Derivations
Poiseuille Equation
The Drainage Ellipse Equation
The van Genuchten K(S<sup>e</sup>) Function
Relationship between the Gardner Exponent and Macroscopic Capillary Length
Steady Infiltration to a Water Table
The Falling-Head Method
Problems
Heat Flow in Soils
Introduction
Surface Energy Balance
Steady Soil Heat Flux
Transient Soil Heat Flux
Heat Transport Equation
Analytical Solutions to the Heat Transport Equation
Numerical Solutions to the Heat Flow Equation
Soil Heat Flow with HYDRUS-1D
Summary
Derivations
Properties of the Laplace Transform
Laplace Transform Solution to the Heat Flow Equation
Properties of the Complementary Error Function
Problems
Transient Water Flow in Soils
Introduction
Transient Water Flow
The Richards Equation
Initial Conditions
Boundary Conditions
System-Independent Boundary Conditions
System-Dependent Boundary Conditions
Numerical Solutions to the Richards Equation
Infiltration
Infiltration into a Uniform Soil
Soil Crusts and Subsurface Layers
Infiltration Equations
Green-Ampt Equations
Curve Number Approach
Borehole Infiltration
Subsurface Irrigation
Redistribution
Evaporation
Transpiration
Preferential Flow
Macropores
Fingering and Funnel Flow
Capillary Barriers
Groundwater Recharge and Discharge
Inverse Solutions and Parameter Optimization
Summary
Derivations
Problems
Solute Transport
Introduction
Conservation and Flux Equations
Conservation Equation
Transport Processes
Advection
Diffusion
Hydrodynamic Dispersion
Advection Dispersion Equation
Analytical Solution
Breakthrough Curves
Pulse Inputs
Equilibrium Adsorption and the Advection Dispersion Equation
Linear Equilibrium Adsorption
Nonlinear Equilibrium Adsorption
Transformations and the Advection Dispersion Equation
Volatilization and the Advection Dispersion Equation
Flux vs. Resident Concentrations
Nonequilibrium Solute Transport
Physical Nonequilibrium
Chemical Nonequilibrium
Stochastic Advection Dispersion Equation
STANMOD and CXTFIT
Direct Mode
Inverse Mode and Parameter Optimization
Numerical Approaches for Solute Transport
Finite Difference Approach
Finite Element Approach
Stability and Oscillations
HYDRUS Examples of Solute Transport
Nonlinear Adsorption and Transport
Transport of Nitrogen Species
Parameter Optimization of Nitrogen Species Model
Solute Transport in the Capillary Fringe
Summary
Derivations
Laplace Transform Solution to ADE
Expected Value for the Lognormal Distribution
Numerical Dispersion
Problems
Appendix
References
Index

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