E-Dissertationen: Search
Now showing items 1-10 of 15
Impact of Land Use and Climate Change on Plant Diversity Patterns in Africa
(2010-07-01)
African plant diversity is strongly threatened by land use and climate change. The growing future demand for food and energy in combination with a climate-change induced decrease in yield will lead to an expansion of ...
Impact of climate change and stocking rates on pasture systems in SE Morocco – An Application of the SAVANNA Ecosystem Model
(2010-11-25)
Extensive sheep and goat grazing provides the main income for population in Morocco’s semi-arid to arid areas where rainfall does not permit cropping without irrigation. As processes of vegetation dynamics cannot be assessed ...
Modelling impacts of climate change on water resources in the Volta Basin, West Africa
(2010-01-27)
The Volta River Basin is one of the largest river systems in Africa covering an area of approximately 400,000 km2 and shared by six riparian states of West Africa. The semi-arid to sub-humid regions of the basin ...
Soil characteristics and soil erosion by water in a semi-arid catchment (Wadi Drâa, South Morocco) under the pressure of global change
(2009-11-24)
Soil resources are crucial for the well-being of man and the environment. The results of the first Global Assessment of Human-induced Soil Degradation (GLASOD) indicate that 13% of the world’s soils are degraded; thereof ...
Ensemble Simulations of Atmospheric Angular Momentum and its Influence on the Earth’s Rotation
(2009-01-21)
The exchange between angular momentum of the solid portion of the Earth and of the atmosphere plays a vital role in exciting small but measurable changes in the rotation of our planet. Recent improvements in geodetic data ...
Estimation of groundwater recharge in the context of future climate change in the White Volta River Basin, West Africa
(2008)
The White Volta River Basin is one of the major sub-basins of the Volta River Basin of West Africa. It covers about 106,000 km2, and the major riparian countries are Burkina Faso and Ghana. The basin has enough ...
Hydrogeological conceptualisation of a tropical river catchment in a crystalline basement area and transfer into a numerical groundwater flow model: Case study for the Upper Ouémé catchment in Benin
(2008)
The scope of this PhD thesis was the hydrogeological conceptualisation of the Upper Ouémé river catchment in Benin. The study area exceeds 14’500 km2; and is underlain by a crystalline basement. At this setting ...
Spatio-temporal patterns of tree-growth response to climatic change
(2008)
Trees growing under temperate climate conditions are affected by numerous growth influences. Dendroclimatological analyses of tree-ring chronologies in which the long-term growth/climate relations are investigated, help ...
Soil degradation by water erosion in a sub-humid West-African catchment: a modelling approach considering land use and climate change in Benin
(2008)
Soil degradation threatens agricultural production and food security in Sub-Saharan Africa. In the coming decades, soil degradation, in particular soil erosion, will become worse through the expansion of agriculture into ...
Modeling hydrological processes in a semi-arid mountainous catchment at the regional scale
(2013-04-02)
In the Upper Drâa Valley (14,988 km2) on the southern slopes of the Moroccan High Atlas Mountains, a highly variable precipitation and large evaporation losses cause major water availability problems. The combined ...