Searched for: contributor:"Savenije, H.H.G. (promotor)"
(1 - 20 of 31)

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Zhang, Z. (author)
Saltwater intrusion is a crucial issue in estuaries. The spread of salinity is described by the dispersion coefficient. A purely empirical equation which links the effective tidal average dispersion to the freshwater discharge was developed by Van der Burgh [1972]. Combining it with the salt balance equation, Savenije [1986] derived a one...
doctoral thesis 2019
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Nijzink, R.C. (author)
The need for calibration of conceptual hydrological models on river discharge is still large, and the scope of this research is to reduce this need based on new parameter estimation techniques, additional information sources and hydrological understanding. In a first step, a regularized model and an adjusted regularized model with sub-grid...
doctoral thesis 2018
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Wang-Erlandsson, L. (author)
We live today on a human-dominated planet under unprecedented pressure on both land and water. The water cycle is intrinsically linked to vegetation and land use, and anticipating the consequences of simultaneous changes in land and water systems requires a thorough understanding of their interactions. This thesis aims to advance our knowledge...
doctoral thesis 2017
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de Boer, T. (author)
Why do equal precipitation events not lead to equal discharge events across space and time? The easy answer would be because catchments are different, which then leads to the second question: Why do hydrologists often use the same rainfall-runoff model for different catchments? Probably because specifying and distributing hydrological processes...
doctoral thesis 2017
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Gharari, S. (author)
Modeling is an essential part of the science of hydrology. Models enable us to formulate what we know and perceive from the real world into a neat package. Rainfall-runoff models are abstract simplifications of how a catchment works. Within the research field of scientific rainfall-runoff modeling, the focus is shifting from performance to...
doctoral thesis 2016
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Gao, H. (author)
In this thesis, a novel landscape-based hydrological model is presented that was developed and tested in numerous catchments around the world with various landscapes and climate conditions. A landscape is considered to consist of a topography and an ecosystem living on it. Firstly, the influence of climate on hydrological process was studied. It...
doctoral thesis 2015
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Gebrekristos, S.T. (author)
The water resources in the Abay/Upper Blue Nile basin are the source of life for the several hundred million people living in the basin and further downstream. It provides more than 60% of the total Nile water. Intensive farming in unfavourable soils and slopes, overgrazing and soil erosion is among the major problems in the basin. Land...
doctoral thesis 2015
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Gisen, J.I.A. (author)
Estuaries have been used for settlement by humans since 5000-9000 years ago [Day et al., 2012]. The calm environment and nutrient-rich soil encouraged the development of ports and agriculture. Over-development however has put estuaries in unhealthy condition, where the water is polluted (excessive nutrient or salt intrusion problem) and natural...
doctoral thesis 2015
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Van der Ent, R.J. (author)
Where does precipitation come from? It is not easy to answer this question because of the complex and energy-intensive processes that bring moisture to a certain location and cause moisture to precipitate highly heterogeneously in space and variable over time. Part of the precipitation comes from so-called “moisture recycling”, which is moisture...
doctoral thesis 2014
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Cai, H. (author)
The ultimate aim of this thesis is to enhance our understanding of tidal wave propagation in convergent alluvial estuaries (of infinite length). In the process, a new analytical model has been developed as a function of externally defined dimensionless parameters describing friction, channel convergence and river discharge. This model has been...
doctoral thesis 2014
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Krzeminska, D.M. (author)
Preferential flow occurs in many soils and it is recognized to influence soil moisture distribution and hydrological fluxes at different scales. Preferential flow paths are formed for example by soil fauna, by plant roots or soil erosion. Water plays an important role in mass movement processes: rainwater or snow melt infiltrates into the soil...
doctoral thesis 2012
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Westhoff, M.C. (author)
Headwater catchments are important contributors to streamflow. They are small, but all combined they influence river flow significantly. To be able to make proper runoff predictions under different climate conditions and changing land use, it is important to have detailed understanding of the discharge processes in the headwater catchments. In...
doctoral thesis 2011
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Matgen, P. (author)
The technique of active microwave remote sensing has made much progress toward its high potential to monitor water storage changes in terrestrial surface and subsurface water bodies at various spatial and temporal scales. The number of studies demonstrating the support these data can offer in hydrological and hydraulic model building, model...
doctoral thesis 2011
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Hellebrand, H.G.W. (author)
The thesis treats a selection of hydrological studies, which make use of a variety of models and approaches that have a common character: simplicity. Simplicity implies parsimonious use of parameters. These studies offer opportunities for hydrological research that are not, or hardly achievable with more complex models and approaches. In the...
doctoral thesis 2010
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Gerrits, A.M.J. (author)
Interception is the part of the rainfall that is intercepted by the earth’s surface and which subsequently evaporates. In this definition the earth’s surface includes everything that becomes wet after a rainfall event and that dries out soon after. It includes: vegetation, soil surface, litter, build-up surface, etc. How much of the...
doctoral thesis 2010
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Makurira, H. (author)
The challenge of water scarcity as a result of insufficient seasonal rainfall and dry spell occurrences during cropping seasons is compounded by inefficient agricultural practices by smallholder farmers where insignificant soil and water conservation efforts are applied. The hypothesis of this research is that many of the past research efforts...
doctoral thesis 2010
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De Vos, N.J. (author)
The transformation from precipitation over a river basin to river streamflow is the result of many interacting processes which manifest themselves at various scales of time and space. The resulting complexity of hydrological systems, and the difficulty to properly and quantitatively express the information that is available about them, determine...
doctoral thesis 2009
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Winsemius, H.C. (author)
Hydrological models at river basin scale are needed to predict floods, droughts, available water, and effects of future changes, caused by climate and land cover change. However, in many river basins, there is not enough data available to construct these models. Fortunately, it becomes more and more attractive to use earth observations from...
doctoral thesis 2009
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Kamp, R.G. (author)
doctoral thesis 2009
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Mul, M.L. (author)
Ungauged catchments can be found in many parts of the world, but particularly in sub-Saharan Africa. Information collected in a gauged catchment and its regionalisation to ungauged areas is crucial for water resources assessment. Especially farmers in semi-arid areas are in need of such information. Inter and intra-seasonal rainfall variability...
doctoral thesis 2009
Searched for: contributor:"Savenije, H.H.G. (promotor)"
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