MODELS FOR PROCESSES IN THE SOIL - PROGRAMS AND EXERCISES

DI TERIMA DARIPADA PERPUSTAKAAN REKABENTUK

1. Introduction. 1.1 Principals structure of a BASIC program. 1.2 The BASIC-dialect used. 1.3 To solve a differential equation using BASIC. 1.4 Exercises with the transport equation. 2. Simulation of simple one-dimensional transport processes. 2.1 Introduction: A remark about analytical and numerical solutions. 2.2 Heat conduction in the dry homogeneous soil. 2.3 Explicit and implicit solution for solute transport problems. 2.4 Example simulations of solute transport. 3. Simulation of the one-dimensional water transport. 3.1 Soil water movement as an example for the solution of non-linear differential equation. 3.2 The Newton-Raphson methods to solve the water transport equation. 3.3 The wind- van Doorne methods to solve the water transport equation. 3.4 Infiltration into homogeneous soils. 3.5 Infiltration into a two soil. 3.6 Capillary rise in homogeneous and multi-layered soils. 4. Transformation processes. 4.1 Simple reaction in homogeneous soils. 4.2 Complex reactions in homogeneous soils. 4.3 Reactions in heterogeneous soils: kinetic adsorption and desorption processes. 4.4 Other sources and sink terms: uptake by roots. 5. Simple soil heat water and matter regime model. 5.1 A simple soil heat regime model. 5.2 A simple model of the soil gas regime. 5.3 A simple water regime model. 5.4 A model to simulate nitrogen regime during the winter half year. 5.5 Movement of solutes in soils. 6. Regional models. 6.1 Modelling water and solute transport according to Burns. 6.2 Geostatistical representation of spatial heterogeneity. 6.3 Monte-Carlo simulations of steady state solute transport. 7. Literature. 8. Appendix.

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