FG Wasserwirtschaft und Hydrosystemmodellierung

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Electronic supplemental material

Simons, Franz (2020-01-31)

This is the electronic supplemental material to the doctoral thesis "A robust high-resolution hydrodynamic numerical model for surface water flow and transport processes within a flexible software framework". The full source code of the Hydroinformatics Modeling System (hms) is available at TU Berlin GitLab. Access to the GIT repository is granted by the Chair of Water Resources Management and ...

A robust high-resolution hydrodynamic numerical model for surface water flow and transport processes within a flexible software framework

Simons, Franz (2020)

In water resources management computer simulations and numerical methods have become a more and more important tool for supporting decisions. They enable the understanding of complex relationships in the hydrological cycle and predictions about future development. This thesis describes the development of a numerical modeling software which allows the integrated simulation of surface water flow...

A three-dimensional two-phase model for flow, transport and mass transfer processes in sewers

Teuber, Katharina (2020)

Sewer networks are one major pillar of modern cities’ infrastructure. Their functionality ensures the transport of wastewater to the sewage treatment plant and the transport of rainwater from residential areas. Damages to sewers cause infiltration and exfiltration and at the same time high costs for rehabilitation. The formation of hydrogen sulphide (H2S) represents a risk factor for the condit...

Is the Hyporheic Zone Relevant beyond the Scientific Community?

Lewandowski, Jörg ; Arnon, Shai ; Banks, Eddie ; Batelaan, Okke ; Betterle, Andrea ; Broecker, Tabea ; Coll, Claudia ; Drummond, Jennifer ; Gaona Garcia, Jaime ; Galloway, Jason ; Gomez-Velez, Jesus ; Grabowski, Robert ; Herzog, Skuyler ; Hinkelmann, Reinhard ; Höhne, Anja ; Hollender, Juliane ; Horn, Marcus ; Jaeger, Anna ; Krause, Stefan ; Löchner Prats, Adrian ; Magliozzi, Chiara ; Meinikmann, Karin ; Mojarrad, Brian ; Mueller, Birgit ; Peralta-Maraver, Ignacio ; Popp, Andrea ; Posselt, Malte ; Putschew, Anke ; Radke, Michael ; Raza, Muhammad ; Riml, Joakim ; Robertson, Anne ; Rutere, Cyrus ; Schaper, Jonas ; Schirmer, Mario ; Schulz, Hanna ; Shanafield, Margaret ; Singh, Tanu ; Ward, Adam ; Wolke, Philipp ; Wörman, Anders ; Wu, Liwen (2019-10-25)

Rivers are important ecosystems under continuous anthropogenic stresses. The hyporheic zone is a ubiquitous, reactive interface between the main channel and its surrounding sediments along the river network. We elaborate on the main physical, biological, and biogeochemical drivers and processes within the hyporheic zone that have been studied by multiple scientific disciplines for almost half a...

Integral Flow Modelling Approach for Surface Water-Groundwater Interactions along a Rippled Streambed

Broecker, Tabea ; Teuber, Katharina ; Sobhi Gollo, Vahid ; Nützmann, Gunnar ; Lewandowski, Jörg ; Hinkelmann, Reinhard (2019-07-22)

Exchange processes of surface and groundwater are important for the management of water quantity and quality as well as for the ecological functioning. In contrast to most numerical simulations using coupled models to investigate these processes, we present a novel integral formulation for the sediment-water-interface. The computational fluid dynamics (CFD) model OpenFOAM was used to solve an e...

Climate Change Demands Adaptive Management of Urban Lakes: Model-Based Assessment of Management Scenarios for Lake Tegel (Berlin, Germany)

Ladwig, Robert ; Furusato, Eiichi ; Kirillin, Georgiy ; Hinkelmann, Reinhard ; Hupfer, Michael (2018-02-10)

Lakes are known to be strongly affected by climate change as a result of their sensitivity to atmospheric forcing. The combined response of urban lakes to climatic changes and to urbanization of the catchment may be further altered by water quality management measures. We studied Lake Tegel in Berlin, Germany as a representative urban lake profoundly influenced by intense water management measu...

Adapting the water management to mitigate the impact of multiple stressors on an urban lake

Ladwig, Robert (2019)

Urban lakes are aquatic ecosystems that are influenced by a water management system and by a possibly strongly sealed urban catchment. The water management aims to fulfill multiple objectives: providing drinking water, sanitation and recreation for the people as well as keeping the ecosystem in a sustainable and resilient state. Urban lakes are facing several stressors. For instance, climate ch...

The assessment of hydrological impacts of climate change and their implications for water management across scales

Lobanova, Anastasia (2019)

The impacts of climate change can become a trigger for critical changes in the spatial and temporal distribution of water resources in many regions in Europe. This will lead from obviously negative effects in some regions to creation of opportunities in others. In the face of future changes: economic, social and environmental, both natural and triggered by anthropogenic activities, the effectiv...

A Novel Slope Failure Operator for a Non-Equilibrium Sediment Transport Model

Zhao, Jiaheng ; Özgen, Ilhan ; Liang, Dongfang ; Hinkelmann, Reinhard (2018)

Complex transport mechanism and interaction between fluid and sediment make the mathematical and numerical modeling of sediment transport very challenging. Different types of models can lead to different results. This paper investigates a non-equilibrium sediment transport model based on the total load. In this type of model, it is assumed that a bed slide will occur if the bed slope reaches a ...

A depth-averaged non-cohesive sediment transport model with improved discretization of flux and source terms

Zhao, Jiaheng ; Özgen-Xian, Ilhan ; Liang, Dongfang ; Wang, Tian ; Hinkelmann, Reinhard (2019)

This paper presents novel flux and source term treatments within a Godunov-type finite volume framework for predicting the depth-averaged shallow water flow and sediment transport with enhanced the accuracy and stability. The suspended load ratio is introduced to differentiate between the advection of the suspended load and the advection of water. A modified Harten, Lax and van Leer Riemann sol...

Comparison of depth-averaged concentration and bed load flux sediment transport models of dam-break flow

Zhao, Jiaheng ; Özgen, Ilhan ; Liang, Dongfang ; Hinkelmann, Reinhard (2017)

This paper presents numerical simulations of dam-break flow over a movable bed. Two different mathematical models were compared: a fully coupled formulation of shallow water equations with erosion and deposition terms (a depth-averaged concentration flux model), and shallow water equations with a fully coupled Exner equation (a bed load flux model). Both models were discretized using the cell-c...

An improved multislope MUSCL scheme for solving shallow water equations on unstructured grids

Zhao, Jiaheng ; Özgen-Xian, Ilhan ; Liang, Dongfang ; Wang, Tian ; Hinkelmann, Reinhard (2018-10-19)

This paper describes an improved vector manipulation multislope monotone upstream-centred scheme for conservation laws (MUSCL) reconstruction for solving the shallow water equations on unstructured grids. This improved MUSCL reconstruction method includes a bigger stencil for the interpolation and saves time for determining the geometric relations compared to the original vector manipulation me...

Improved multislope MUSCL reconstruction on unstructured grids for shallow water equations

Zhao, Jiaheng ; Özgen, Ilhan ; Liang, Dongfang ; Hinkelmann, Reinhard (2018)

In shallow water flow and transport modeling, the monotonic upstream‐centered scheme for conservation laws (MUSCL) is widely used to extend the original Godunov scheme to second‐order accuracy. The most important step in MUSCL‐type schemes is MUSCL reconstruction, which calculate‐extrapolates the values of independent variables from the cell center to the edge. The monotonicity of the scheme is...

Fully coupled robust shallow water flow and sediment transport model on unstructured grids

Zhao, Jiaheng (2019)

This Ph.D. thesis advances the fully coupling of robust shallow water flow and sediment transport modeling. The first part mainly focuses on the multislope MUSCL reconstruction for shallow water flow on unstructured grids. A limitation method for reconstruction of velocities avoids extremely high values for wet/dry fronts. The reconstruction methods are tested via analytical benchmarks and lab...

Modeling the impacts of climate extremes and multiple water uses to support water management in the Icó-Mandantes Bay, Northeast Brazil

Matta, Elena ; Koch, Hagen ; Selge, Florian ; Simshäuser, Max Nino ; Rossiter, Karina ; Silva, Gérsica Moraes Nogueira da ; Gunkel, Günter ; Hinkelmann, Reinhard (2018-07-25)

The hydropower production, water supply and aquaculture services of the Itaparica Reservoir are of immense importance for the Brazilian Northeast. Uncontrolled water resources consumption (e.g. irrigation, water supply), climate and land use change effects deteriorated the water quantity and quality in the reservoir, leading to socio-economic and environmental problems. In this work, a depth-av...

Electronic Supplementary to Doctoral Dissertation

Lobanova, Anastasia (2018)

This Electronic Supplementary contains the SWIM Model set up, calibrated and validated for all eight river basins, together with executables, used to perform modelling experiments for Doctoral Thesis "The assessment of hydrological impacts of climate change and their implications for water management across scales: from the local to European scale"

Simulations of nutrient emissions from a net cage aquaculture system in a Brazilian bay

Matta, Elena ; Selge, Florian ; Gunkel, Günter ; Rossiter, Karina ; Jourieh, Ayman ; Hinkelmann, Reinhard (2016)

Hydrodynamics and transport simulations were conducted with the modeling software TELEMAC-2D on Icó-Mandantes bay, a branch of the Itaparica reservoir. The bay has a maximal operational water level amplitude of 5 m and is suffering from eutrophication and algae bloom. Therefore, we investigated low and high water level scenarios with two different high resolution meshes, with the purpose to dee...

Urban flood modeling using shallow water equations with depth-dependent anisotropic porosity

Özgen, Ilhan ; Zhao, Jiaheng ; Liang, Dongfang ; Hinkelmann, Reinhard (2016)

The shallow water model with anisotropic porosity conceptually takes into account the unresolved subgrid-scale features, e.g. microtopography or buildings. This enables computationally efficient simulations that can be run on coarser grids, whereas reasonable accuracy is maintained via the introduction of porosity. This article presents a novel numerical model for the depth-averaged equations w...

Shallow water equations with depth-dependent anisotropic porosity for subgrid-scale topography

Özgen, Ilhan ; Liang, Dongfang ; Hinkelmann, Reinhard (2016)

This paper derives a novel formulation of the depth-averaged shallow water equations with anisotropic porosity for computational efficiency reasons. The aim is to run simulations on coarser grids while maintaining an acceptable accuracy through the introduction of porosity terms, which account for subgrid-scale effects. The porosity is divided into volumetric and areal porosities, which are ass...

Upscaling the shallow water model with a novel roughness formulation

Özgen, Ilhan ; Teuber, Katharina ; Simons, Franz ; Liang, Dongfang ; Hinkelmann, Reinhard (2015-08)

This study presents a novel roughness formulation to conceptually account for microtopography and compares it to four existing roughness models from literature. The aim is to increase the grid size for computational efficiency, while capturing subgrid scale effects with the roughness formulation to prevent the loss in accuracy associated with coarse grids. All roughness approaches are implement...