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Dissertation
Modeling analysis of 21st century climate change projections and their impacts on the hydrology of the Karaj-Jajrood basin, Iran
(2023-12)
Two main rivers, Karaj and Jajrood which provide metropolitan Tehrans’ water, flow in Alborz and Tehran province, respectively. In the last decades, the impact of climate change on temperature and precipitation is tangible in these two provinces. For the Karaj-Jajrood basin, during the period 2003-2012, the minimum temperature increased by 1°C, the maximum temperature by 0.6°C and precipitation decreased by -7%, relative to the average of 1972-2012.
To assess climate change impacts in the region, the Statistical ...
Dissertation
Numerical Simulation of Ground Water Flow in Dual Porous Media of the Karun 4 Dam (Iran) Foundation and Abutments
(2019)
Beim Bau von Staudämmen und Reservoirs in Karst, die für ihre hohe Pererverenz aufgrund von Auflösungsfehlern und Leitungen bekannt sind, besteht das vorherrschende Risiko im Wasserverlust. Der Wasserverlust durch das Fundament und die Widerlager der in den Karstgebieten errichteten Dämme führt zu erheblichen Kosten und zur Nichtproduktivität der Staudämme. Obwohl die Konstruktion eines Dichtungsschleiers die gebräuchlichste Methode zur Verringerung oder Verhinderung von Wasserverlust ist, kann sie das Problem nur ...
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
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
Energy Budget- and Temperature Index- based Calculations of Seasonal Mass Balances and Discharge in the Tropical Glacier Artesonraju and Artesoncocha Basin in the Cordillera Blanca,
Peru
(2020)
The core of the present Doctoral study deals with glacier simulations for calculating mass balance and discharge in the Artesonraju glacier and Artesoncocha basin, in the Cordillera Blanca (CB), Peru. For this purpose, two different models are used. One is an energy-model (EBM) which is physically based and uses energy fluxes measurements on the glaciers, whereas the other one is a temperature index model (TIM) which is empirical and uses mainly temperature and precipitation as its main input data.
An analysis of ...
Dissertation
Analysis and Projection of spatio-temporal Drought and Climate Change Impacts on Groundwater Resources and Surface-Groundwater Interactions for three Iranian Case Studies
(2018-08)
Der Klimawandel und deren Variabilität, wie z.B. die Dürre, wirken sich auf die Wasserressourcen und insbesondere auf die wertvolle Grundwasserressource aus, die im Iran mehr als 80% des Wasserbedarfs aller Bereiche (Landwirtschaft, Haushalt und Industrie) ausmacht. Es ist von größter Bedeutung, Anpassungsstrategien zur Bewältigung dieser Probleme zu finden, um ein nachhaltiges Wasserressourcenmanagement sicherzustellen. In dieser Hinsicht sind physikalisch basierte hydrologische Modelle gekoppelt mit Grundwassermodellen ...
Aufsatz
Rainfall Prediction with AMSR–E Soil Moisture Products Using SM2RAIN and Nonlinear Autoregressive Networks with Exogenous Input (NARX) for Poorly Gauged Basins: Application to the Karkheh River Basin, Iran
(2018-07-23)
Accurate estimates of daily rainfall are essential for understanding and modeling the physical processes involved in the interaction between the land surface and the atmosphere. In this study, daily satellite soil moisture observations from the Advanced Microwave Scanning Radiometer–Earth Observing System (AMSR–E) generated by implementing the standard National Aeronautics and Space Administration (NASA) algorithm are employed for estimating rainfall, firstly, through the use of recently developed approach, SM2RAIN ...
Aufsatz
Evaluation of Statistical-Downscaling/Bias-Correction Methods to Predict Hydrologic Responses to Climate Change in the Zarrine River Basin, Iran
(2018-04-20)
Modeling the hydrologic responses to future changes of climate is important for improving adaptive water management. In the present application to the Zarrine River Basin (ZRB), with the major reach being the main inflow source of Lake Urmia (LU), firstly future daily temperatures and precipitation are predicted using two statistical downscaling methods: the classical statistical downscaling model (SDSM), augmented by a trend-preserving bias correction, and a two-step updated quantile mapping (QM) method. The general ...
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
Hydro-economic Modeling for Optimization of Sustainable Water Management of a River Basin in the Wake of Climate Change: Case Study of the Zarrine River Basin (ZRB), Iran
(2018-11)
Food and water security will be a great future challenge due to the growth of population and unsustainable water usage. The renewable water resources in the MENA region including Iran, are expected to decline. This situation is exacerbated by the increasing demands and the rising climate variability in the wake of global climate change affecting adversely the available water resources. This thesis research attempts to evaluate the impacts of climate change and water demands on the hydrological and environmental ...