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Now showing items 11-20 of 20
Dissertation
Estimating the Effects of Climate Change on the Water Resources in the Upper Indus Basin (UIB)
(2018)
Water balance calculations and spatially distributed rainfall-runoff models require high-resolution climatic datasets as the primary input, however, in the Upper Indus basin (UIB), it is rare to find in-situ observational climate data which have spatial, altitudinal and temporal coverage, suitable enough for distributed hydrological investigations and so for the assessment of climate-change’s hydrological impacts. The average precipitation amounts over the UIB are unrealistically low to sustain the observed discharge ...
Dissertation
Lateral spreading in basal reinforced embankments supported by pile-like elements
(Kassel Univ. Press, 2008)
Bei Dämmen auf wenig tragfähigem Untergrund ist es zwischenzeitlich Stand der Technik, an der
Dammbasis eine Bewehrung aus hochzugfesten Geokunststoffen (Gewebe oder Geogitter) einzulegen.
Dabei können die Bewehrungslagen direkt auf den weichen Boden oder über Pfahlelementen
angeordnet werden, die die Dammlasten in tiefere, tragfähigere Schichten abtragen.
Die horizontale Bewehrung an der Dammbasis hat die Aufgabe, die vertikalen Dammlasten und
die nach außen wirkenden Spreizkräfte aufzunehmen. Dies ist besonders ...
Dissertation
Experimental and numerical Investigations of Tracer- and Density- dependent Transport in highly stochastic heterogeneous porous Media and Evaluation of transverse Macrodispersion
(2017-11-27)
Experimentelle und numerische Untersuchungen der dichteabhängigen Strömung und des Transportes gelöster Stoffe in einem sandbepackten Labortank sind wichtig für das Verständnis des Prozesses der Erneuerung von Aquifer. Am Hydrauliklabor der Universität Kassel werden solche Experimente zur Analyse von Makrodispersionseffekte auf eine Frisch-Salzwasser-Grenzfläche innerhalb der heterogen gepackten Sandstruktur mit vorgegebenen stochastischen Eigenschaften in einem Plexiglastank mit den Maßen 9.8×0.1 × 1.225 m durchgeführt. ...
Dissertation
Climate Change Impact Assessment of Basin-scale Water Allocation and Management in the Karkheh River Basin, Iran
(2018-09-21)
Hydrological research is intended to improve our understanding of hydrologic processes, the role of hydrological systems in providing water for ecosystems and society, and of the water cycle in the functioning of the earth system. The proper understanding of the hydrology of arid and semi-arid regions is becoming increasingly important, due to diminishing projections of water resource availability in response to global environmental changes. The main objective of this thesis study is to investigate the development ...
Dissertation
The prediction of seasonal and inter-annual climate variations and their impacts on the water resources in the eastern seaboard of Thailand
(2015-04-27)
The research of this thesis dissertation covers developments and applications of short-and long-term climate predictions. The short-term prediction emphasizes monthly and seasonal climate, i.e. forecasting from up to the next month over a season to up to a year or so. The long-term predictions pertain to the analysis of inter-annual- and decadal climate variations over the whole 21st century. These two climate prediction methods are validated and applied in the study area, namely, Khlong Yai (KY) water basin located ...
Dissertation
Downscaling and Modeling the Effects of Climate Change on Hydrology and Water Resources in the Upper Blue Nile River Basin, Ethiopia
(2013-05-17)
The Upper Blue Nile River Basin (UBNRB) located in the western part of Ethiopia, between 7° 45’ and 12° 45’N and 34° 05’ and 39° 45’E has a total area of 174962 km2 . More than 80% of the population in the basin is engaged in agricultural activities. Because of the particularly dry climate in the basin, likewise to most other regions of Ethiopia, the agricultural productivity depends to a very large extent on the occurrence of the seasonal rains. This situation makes agriculture highly vulnerable to the impact of ...
Dissertation
Interannual and interdecadal oscillations in hydrological variables: Sources and modeling of the persistence in the Elbe River Basin
(2006-07-04)
Wenn man die Existenz von physikalischen Mechanismen ignoriert, die für die Struktur hydrologischer Zeitreihen verantwortlich sind, kann das zu falschen Schlussfolgerungen bzgl. des Vorhandenseins möglicher Gedächtnis (memory) -Effekte, d.h. von Persistenz, führen. Die hier vorgelegte Doktorarbeit spürt der niedrigfrequenten klimatischen Variabilität innerhalb den hydrologischen Zyklus nach und bietet auf dieser "Reise" neue Einsichten in die Transformation der charakteristischen Eigenschaften von Zeitreihen mit ...