6 documents found

Dissertation
All rights reserved
2019

Regional groundwater representation by coupling the mesoscale Hydrologic...

Groundwater is the source of approximately twenty percent of the worlds freshwater supply. It is also one of the most important sources of water for irrigation. However, groundwater has been over-used and polluted in many places in the world. Climate change and saltwater intrusion are threatening groundwater...
Dissertation
All rights reserved
2017

Innovative techniques for the characterization and interpretation of coastal...

Aquifers are intrinsically heterogeneous, but the interpretation of pumping tests to estimate hydraulic aquifer parameters, such as transmissivity and storativity, is commonly performed under the assumption of homogeneity, by utilizing Theis equation. This yields interpreted parameters whose relation...
Dissertation
All rights reserved
2017

Soil moisture droughts in Germany : retrospective analysis, parametric uncerta ...

Droughts are worldwide the second most severe natural disaster beside floods. In Europe, droughts are the costliest natural disasters with average expenses of 621 million EUR per event. The last severe drought event took place in 2003. It induced an agro-economic loss of 1.5 billion EUR in Germany alone....
Dissertation
All rights reserved
2017

Long-term drainage effects on carbon fluxes of an Arctic permafrost ecosystem

Permafrost landscapes in the Northern high latitudes with their massive organic carbon stocks are critically important for the global carbon cycle. Large uncertainties in the sustainability of these carbon pools under future climate conditions persist, caused by limited understanding of permafrost carbon...
Dissertation
All rights reserved
2016-05-31

Canopy structure and the impact of drought on a Quercus suber L. woodland...

The thesis covers two topics, a performance evaluation of indirect leaf area index L and gap probability Pgap observation with the new digital cover photography DCP with special focus on the application in sparse canopies and the analysis of drought effects on water / carbon fluxes in a typical Mediterranean...
Dissertation
All rights reserved
2016

Evaluation and disaggregation of climate model outputs for european drought...

Landwirtschaftliche Dürren führen zu hohen sozialen und wirtschaftlichen Schäden. Die Auswirkungen dieser Extremereignisse können mit der Hilfe von einem saisonalen Vorhersagesystem, welches Dürren mehrere Monate im Voraus prognostiziert, abgeschwächt werden. Das Vorhersagesystem, welches in dieser Arbeit...