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Dissertation
Integrierte hydrologische Modellierung von Oberflächen- und Grundwasser in dem mesoskaligen Einzugsgebiet des Rautenbach, Nordhessen
(2021-07)
In den vergangenen Jahren kam es in Europa vermehrt zu sommerlichen Dürreperioden mit erheblichen Beeinträchtigungen der Ökosysteme sowie für Land- und Forstwirtschaft. Die dadurch zunehmenden Herausforderungen an das Wasserressourcenmanagement fordern ein erweitertes Systemverständnis, welches durch realitätsnahe hydrologische Modellierung gewonnen werden kann.
Integrierte hydrologische Modelle ermöglichen die räumlich und zeitlich differenzierte Abbildung ober- und unterirdischer Abflüsse und derer Wechselwirkungen. ...
Dissertation
Three-dimensional hydrodynamic and ecosystem modeling of warm-monomictic reservoirs (Maroon and Abolabbas, Iran) under the impact of 21st century climate change
(2021-11)
Lakes and reservoirs, as the endpoint of their upstream catchment, collect their water as the resultant of the hydrological and ecosystem processes and, thus, act as a gauge of their catchment’s management. Physical processes, e.g. stratification and mixing and propagation of density currents, are the main drivers of the biochemical factors in lakes and reservoirs and are prone to be altered and affected by climate change. Hydrodynamic models are the tools to simulate the behavior of the water body under various ...
Dissertation
Behaviour Study of Grouted Connection for Offshore Wind Turbine Structures with Brittle Cement Based Grouts
(2020)
Researches show that the energy demand in the world is significantly increasing and climate change becomes a problematic issue, therefore, the interest in renewable energy is growing extremely fast. Offshore wind energy is one of the most effective renewable sources in Europe and other places in the world. One of the most important parts in the offshore foundation is the grouted connection as it is the first element to be designed in the design of the foundation structure of an offshore wind turbine because the ...
Dissertation
Characterisation of Cold Asphalt Mixtures with the Addition of Active Fillers
(2023)
Climate change, the limited availability of natural resources, and energy crises are putting pressure on the global societies? to employ low-energy and low-emission technologies for road pavement construction. Cold Recycled Materials (CRM) is an efficient and low-impact solution. CRM with Bituminous Emulsion (CRM-BE) is one of the most common types of CRM. CRM-BEs are created at ambient temperature by combining a high amount of Reclaimed Asphalt (RA) with Bitumen Emulsion (BE). BE used in CRM is typically composed ...
Dissertation
Plastic packaging waste management in Germany: Evaluating and optimizing material flows and environmental impacts
(2023)
Since 1990, the annual plastic packaging consumption by private end users in Germany more than doubled. This trend can be attributed to plastic's advantageous properties such as its low weight, cost-effectiveness, and customizable features. However, plastic packaging is also widely criticized due to its dependency on fossil fuels, short lifespan, and potential contribution to marine littering. The tension between the popularity of plastic packaging and the environ-mental challenges associated with a short-term product ...
Dissertation
Ultrahochleistungsbetone mit Bewehrung aus Formgedächtnismetallen zur Optimierung der Frisch- und Festbetoneigenschaften
(2023-11)
Formgedächtnislegierungen haben die Eigenschaft sich durch einen thermischen oder spannungsinduzierten Impuls an eine zuvor eingeprägte Form zu „erinnern“. Dies beruht auf einer reversiblen Phasenumwandlung von der Niedrigtemperaturphase Martensit zu der Hochtemperaturphase Austenit. Durch diese Eigenschaft und die sich dadurch gebenden Möglichkeiten finden diese Legierungen auch immer mehr Beachtung im Bauingenieurwesen. Dies ist vor allem im Bereich der Energiedissipation und der externen Vorspannung und dem ...