"Bewertung und Systemmodellierung konkurrierender Wasserressourcen-Nutzer"Water scarcity is among the main challenges to be faced in the 21st century. The demographic
growth and the raised standard of living lead to an increasement of water demand. Since the
climate change combined with non-sustainable exploitation decrease the available resources,
many regions are chronically short of water. Unfavorable management, which is not equipped
to adapt or respond adequately to water deficiency, exacerbates the situation additionally. This
fact elucidates the importance of an equitable and long-termed management and allocation of
the valuable resource.
The emphasis of this study is the setup and analysis of a system model refering to the water
regime of several concurrent water resource users. The main case study used in the thesis is the
argen river, providing water for hydropower production as well as irrigation purposes of the
local orchard farmers. Moreover, the water is important for the river to maintain its ecological
Initially the water supply and demand during dry periods are compared. After setting the
allocation, the different consequences of water shortages are determined and evaluated for
several scenarios. Thus, the water management can be appraised and recommendations can be
The results of the study indicate that the overall economic revenues during low water events
could be increased by prioritizing the agriculture when distributing the available water.
Furthermore, an increase of the minimum discharge in order to maintain ecological
functionality, just marginally affects the financial incomings. Another conclusion is, that the
feasibility of such goal conflicts in southern Germany is rather low.
On top of this another system model is compiled, based on a second study area in Niger: the
Kandadji-dam-project. The scenarios here are distinctly more complex and different impacts
of scarcity of water have to be considered. As the project isn`t finished yet, the body of specific
source material is limited. Still, the model exemplifies the manifold potentials of system
dynamics within water conservancy.