Foreword; Acknowledgements; Contents; 1 Introduction; 1.1 Catchment Description; 1.1.1 Topography and Climate; 1.1.2 Socio-Economy and Land Cover; 1.1.3 Hydrology; 1.1.4 Hydrogeology; 1.1.5 Water Quality; 1.2 Potential Pressures and Impacts on Acheng Water Supply; 1.2.1 Chemical Pollutions by Industrial Point Sources; 1.2.2 Nitrate Pollution from Diffusive Sources; 1.2.3 Future Water Demand; 2 Modelling Strategy; 2.1 Work Flow; 2.2 Overview of Available Data-Sets; 2.3 Software Requirements; 3 Stationary Groundwater Model; 3.1 Meshing; 3.1.1 2D Meshing; 3.1.2 Volume Meshing

3.1.3 Adding Soil Layer3.1.4 Mesh Quality; 3.2 File Transformation into OGS Input Files; 3.3 Boundary Conditions; 3.3.1 Source Terms; 3.3.2 Boundary Conditions; 3.3.3 Initial Conditions; 3.4 Material Properties; 3.5 Additional OGS Input Files; 3.5.1 Process Specification; 3.5.2 Numerics; 3.5.3 Time Stepping; 3.5.4 Output ; 3.6 Model Execution; 3.7 Results; 4 Reactive Nitrate Transport Model; 4.1 Nitrate Allocation and Degradation in the Subsurface; 4.2 Media Characterization; 4.2.1 Material Component Parameters; 4.2.2 Material Properties; 4.2.3 Material Solid Properties

4.2.4 Material Fluid Properties4.3 Kinetic Reaction Definition; 4.4 Boundary Conditions; 4.4.1 Initial Conditions; 4.4.2 Source Terms; 4.4.3 Boundary Conditions; 4.5 Adaptation of Additional Input Files; 4.5.1 Process Specification; 4.5.2 Time Stepping; 4.5.3 Numerics; 4.5.4 Output; 4.6 Model Execution; 4.7 Model Results; 5 Reactive Point Pollutants Model Within a Transient Flow Field; 5.1 Process Definition; 5.2 Material Component Properties; 5.3 Initial and Boundary Conditions; 5.3.1 Initial Conditions; 5.3.2 Source Terms; 5.3.3 Boundary Conditions; 5.4 Model Execution; 5.5 Model Results

Appendix A SymbolsAppendix B Keywords; References