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1	Handbook for sustainable development: Integrated Water Resources Management in Hanoi, Vietnam / Sổ tay hướng dẫn về phát triển bền vững: Quản lý tổng hợp tài nguyên nước tại Hà Nội, Việt Nam Stefan, Catalin, Fuchs, Lothar, Röstel, Gunda, Werner, Peter 09 November 2012 (has links) (PDF) The handbook presented in this paper summarises the results of the research initiative “International Water Research Alliance Saxony” (IWAS). The subproject “IWAS Vietnam” (Phase I, October 2008 – December 2010) focuses on the model region “South-East Asia” with emphasis on Vietnam. The project started as a joint research initiative between German and Vietnamese organisations and included contributions from academic, private and public sector in both countries. The handbook was compiled by the Technische Universität Dresden (project coordination), the Institute for Technical and Scientific Hydrology and Dresden Drainage and Sewerage Company, with substantial contributions from Vietnamese partners. / Sổ tay hướng dẫn trong bài viết này tóm lược các kết quả của sáng kiến nghiên cứu từ “Liên minh Nghiên cứu ngành nước quốc tế bang Saxony” (IWAS). Dự án nhánh “IWAS Việt Nam” (giai đoạn 1, 10/2008 - 12/2010) tập trung vào khu vực Đông Nam Á với trọng tâm là Việt Nam. Dự án khởi động như một sáng kiến liên kết nghiên cứu giữa các tổ chức của CHLB Đức và Việt Nam với sự đóng góp từ các đơn vị tư nhân, nhà nước và trường đại học của cả hai quốc gia. Quyển sổ tay này được biên soạn bởi Đại học Kỹ thuật Dresden (cơ quan điều phối dự án), Viện Công nghệ và Khoa học Thủy văn, và Công ty Thoát nước Dresden, cùng với sự đóng góp quan trọng của các đối tác Việt Nam. ddc:628 rvk:AR 22340
2	Handbook for sustainable development: Integrated Water Resources Management in Hanoi, Vietnam: Short communication Stefan, Catalin, Fuchs, Lothar, Röstel, Gunda, Werner, Peter 09 November 2012 (has links) The handbook presented in this paper summarises the results of the research initiative “International Water Research Alliance Saxony” (IWAS). The subproject “IWAS Vietnam” (Phase I, October 2008 – December 2010) focuses on the model region “South-East Asia” with emphasis on Vietnam. The project started as a joint research initiative between German and Vietnamese organisations and included contributions from academic, private and public sector in both countries. The handbook was compiled by the Technische Universität Dresden (project coordination), the Institute for Technical and Scientific Hydrology and Dresden Drainage and Sewerage Company, with substantial contributions from Vietnamese partners. / Sổ tay hướng dẫn trong bài viết này tóm lược các kết quả của sáng kiến nghiên cứu từ “Liên minh Nghiên cứu ngành nước quốc tế bang Saxony” (IWAS). Dự án nhánh “IWAS Việt Nam” (giai đoạn 1, 10/2008 - 12/2010) tập trung vào khu vực Đông Nam Á với trọng tâm là Việt Nam. Dự án khởi động như một sáng kiến liên kết nghiên cứu giữa các tổ chức của CHLB Đức và Việt Nam với sự đóng góp từ các đơn vị tư nhân, nhà nước và trường đại học của cả hai quốc gia. Quyển sổ tay này được biên soạn bởi Đại học Kỹ thuật Dresden (cơ quan điều phối dự án), Viện Công nghệ và Khoa học Thủy văn, và Công ty Thoát nước Dresden, cùng với sự đóng góp quan trọng của các đối tác Việt Nam. info:eu-repo/classification/ddc/628 ddc:628
3	Variable-Density Flow Processes in Porous Media On Small, Medium and Regional Scales Walther, Marc 03 November 2014 (has links) (PDF) Nowadays society strongly depends on its available resources and the long term stability of the surrounding ecosystem. Numerical modelling has become a general standard for evaluating past, current or future system states for a large number of applications supporting decision makers in proper management. In order to ensure the correct representation of the investigated processes and results of a simulation, verification examples (benchmarks), that are based on observation data or analytical solutions, are utilized to evaluate the numerical modelling tool. In many parts of the world, groundwater is an important resource for freshwater. While it is not only limited in quantity, subsurface water bodies are often in danger of contamination from various natural or anthropogenic sources. Especially in arid regions, marine saltwater intrusion poses a major threat to groundwater aquifers which mostly are the exclusive source of freshwater in these dry climates. In contrast to common numerical groundwater modelling, density-driven flow and mass transport have to be considered as vital processes in the system and in scenario simulations for fresh-saltwater interactions. In the beginning of this thesis, the capabilities of the modelling tool OpenGeoSys are verified with selected benchmarks to represent the relevant non-linear process coupling. Afterwards, variable-density application and process studies on different scales are presented. Application studies comprehend regional groundwater modelling of a coastal aquifer system extensively used for agricultural irrigation, as well as hydro-geological model development and parametrization. In two process studies, firstly, a novel method to model gelation of a solute in porous media is developed and verified on small scale laboratory observation data, and secondly, investigations of thermohaline double-diffusive Rayleigh regimes on medium scale are carried out. With the growing world population and, thus, increasing pressure on non-renewable resources, intelligent management strategies intensify demand for potent simulation tools and development of novel methods. In that way, this thesis highlights not only OpenGeoSys’ potential of density-dependent process modelling, but the comprehensive importance of variable-density flow and transport processes connecting, both, avant-garde scientific research, and real-world application challenges. Dichteabhängig Strömung Stofftransport Wärmetransport Grundwasser Numerische Simulation Finite-Elemente-Verfahren FEM OpenGeoSys OGS Open Source Benchmark IWAS Oman Al-Batinah Arid Fallstudie Viskosität Gel Dichte thermohaline Stabilität Variable-Density Density-Driven Density-Dependent Flow Mass Transport Heat Transport Numerical Simulation Finite-Element-Method FEM OpenGeoSys OGS Open Source Benchmark IWAS Oman Al-Batinah Case Study Arid Viscosity Gel Density Thermohaline Stability ddc:550 rvk:AR 22140 rvk:AR 22600 Grundwasser Finite-Elemente-Methode Viskosität Temperatur Transportprozess Simulation Dichte <Physik> Fallstudie Salzwasser-Süßwasser-Grenze Salzwasser Meerwasser Oman Open Source Benchmark Semiarides Gebiet Gel Stabilität
4	Variable-Density Flow Processes in Porous Media On Small, Medium and Regional Scales Walther, Marc 07 May 2014 (has links) Nowadays society strongly depends on its available resources and the long term stability of the surrounding ecosystem. Numerical modelling has become a general standard for evaluating past, current or future system states for a large number of applications supporting decision makers in proper management. In order to ensure the correct representation of the investigated processes and results of a simulation, verification examples (benchmarks), that are based on observation data or analytical solutions, are utilized to evaluate the numerical modelling tool. In many parts of the world, groundwater is an important resource for freshwater. While it is not only limited in quantity, subsurface water bodies are often in danger of contamination from various natural or anthropogenic sources. Especially in arid regions, marine saltwater intrusion poses a major threat to groundwater aquifers which mostly are the exclusive source of freshwater in these dry climates. In contrast to common numerical groundwater modelling, density-driven flow and mass transport have to be considered as vital processes in the system and in scenario simulations for fresh-saltwater interactions. In the beginning of this thesis, the capabilities of the modelling tool OpenGeoSys are verified with selected benchmarks to represent the relevant non-linear process coupling. Afterwards, variable-density application and process studies on different scales are presented. Application studies comprehend regional groundwater modelling of a coastal aquifer system extensively used for agricultural irrigation, as well as hydro-geological model development and parametrization. In two process studies, firstly, a novel method to model gelation of a solute in porous media is developed and verified on small scale laboratory observation data, and secondly, investigations of thermohaline double-diffusive Rayleigh regimes on medium scale are carried out. With the growing world population and, thus, increasing pressure on non-renewable resources, intelligent management strategies intensify demand for potent simulation tools and development of novel methods. In that way, this thesis highlights not only OpenGeoSys’ potential of density-dependent process modelling, but the comprehensive importance of variable-density flow and transport processes connecting, both, avant-garde scientific research, and real-world application challenges.:Abstract Zusammenfassung Nomenclature List of Figures List of Tables I Background and Fundamentals 1 Introduction 1.1 Motivation 1.2 Structure of the Thesis 1.3 Variable-Density Flow in Literature 2 Theory and Methods 2.1 Governing Equations 2.2 Fluid Properties 2.3 Modelling and Visualization Tools 3 Benchmarks 3.1 Steady-state Unconfined Groundwater Table 3.2 Theis Transient Pumping Test 3.3 Transient Saltwater Intrusion 3.4 Development of a Freshwater Lens II Applications 4 Extended Inverse Distance Weighting Interpolation 4.1 Motivation 4.2 Extension of IDW Method 4.3 Artificial Test and Regional Scale Application 4.4 Summary and Conclusions 5 Modelling Transient Saltwater Intrusion 5.1 Background and Motivation 5.2 Methods and Model Setup 5.3 Simulation Results and Discussion 5.4 Summary, Conclusion and Outlook 6 Gelation of a Dense Fluid 6.1 Motivation 6.2 Methods and Model Setup 6.3 Results and Conclusions 7 Delineating Double-Diffusive Rayleigh Regimes 7.1 Background and Motivation 7.2 Methods and Model Setup 7.3 Results 7.4 Conclusions and Outlook III Summary and Conclusions 8 Important Achievements 9 Conclusions and Outlook Bibliography Publications Acknowledgements Appendix info:eu-repo/classification/ddc/550 ddc:550

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