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E-raamat: OpenGeoSys Tutorial: Computational Hydrology II: Groundwater Quality Modeling

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This book explores the application of the open-source software OpenGeoSys (OGS) for hydrological numerical simulations concerning conservative and reactive transport modeling. It provides general information on the hydrological and groundwater flow modeling of a real case study and step-by-step model set-up with OGS, while also highlighting related components such as the OGS Data Explorer. The material is based on unpublished manuals and the results of a collaborative project between China and Germany (SUSTAIN H2O). Though the book is primarily intended for graduate students and applied scientists who deal with hydrological modeling, it also offers a valuable source of information for professional geoscientists wishing to expand their knowledge of the numerical modeling of hydrological processes including nitrate reactive transport modeling. This book is the second in a series that showcases further applications of computational modeling in hydrological science.

1 Introduction.- 2 Modelling strategy.- 3 Stationary Groundwater model.- 4 Reactive nitrate transport model.- 5 Reactive point pollutants model within a transient flow field.
1 Introduction
1(12)
1.1 Catchment Description
1(6)
1.1.1 Topography and Climate
1(2)
1.1.2 Socio-Economy and Land Cover
3(1)
1.1.3 Hydrology
4(1)
1.1.4 Hydrogeology
5(1)
1.1.5 Water Quality
6(1)
1.2 Potential Pressures and Impacts on Acheng Water Supply
7(6)
1.2.1 Chemical Pollutions by Industrial Point Sources
8(1)
1.2.2 Nitrate Pollution from Diffusive Sources
9(1)
1.2.3 Future Water Demand
9(4)
2 Modelling Strategy
13(4)
2.1 Work Flow
13(1)
2.2 Overview of Available Data-Sets
14(1)
2.3 Software Requirements
15(2)
3 Stationary Groundwater Model
17(18)
3.1 Meshing
17(5)
3.1.1 2D Meshing
17(2)
3.1.2 Volume Meshing
19(1)
3.1.3 Adding Soil Layer
20(1)
3.1.4 Mesh Quality
21(1)
3.2 File Transformation into OGS Input Files
22(2)
3.3 Boundary Conditions
24(4)
3.3.1 Source Terms
24(3)
3.3.2 Boundary Conditions
27(1)
3.3.3 Initial Conditions
27(1)
3.4 Material Properties
28(1)
3.5 Additional OGS Input Files
29(2)
3.5.1 Process Specification
29(1)
3.5.2 Numerics
30(1)
3.5.3 Time Stepping
30(1)
3.5.4 Output
30(1)
3.6 Model Execution
31(1)
3.7 Results
32(3)
4 Reactive Nitrate Transport Model
35(18)
4.1 Nitrate Allocation and Degradation in the Subsurface
35(3)
4.2 Media Characterization
38(2)
4.2.1 Material Component Parameters
38(1)
4.2.2 Material Properties
38(1)
4.2.3 Material Solid Properties
39(1)
4.2.4 Material Fluid Properties
39(1)
4.3 Kinetic Reaction Definition
40(2)
4.4 Boundary Conditions
42(7)
4.4.1 Initial Conditions
42(2)
4.4.2 Source Terms
44(4)
4.4.3 Boundary Conditions
48(1)
4.5 Adaptation of Additional Input Files
49(2)
4.5.1 Process Specification
49(1)
4.5.2 Time Stepping
49(1)
4.5.3 Numerics
50(1)
4.5.4 Output
50(1)
4.6 Model Execution
51(1)
4.7 Model Results
52(1)
5 Reactive Point Pollutants Model Within a Transient Flow Field
53(10)
5.1 Process Definition
53(1)
5.2 Material Component Properties
54(1)
5.3 Initial and Boundary Conditions
55(4)
5.3.1 Initial Conditions
55(1)
5.3.2 Source Terms
55(2)
5.3.3 Boundary Conditions
57(2)
5.4 Model Execution
59(1)
5.5 Model Results
60(3)
Appendix A Symbols 63(2)
Appendix B Keywords 65(8)
References 73