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- Westhoff, M.C. (author), Savenije, H.H.G. (author), Luxemburg, W.M.J. (author), Stelling, G.S. (author), van de Giesen, N.C. (author), Selker, J.S. (author), Pfister, L. (author), Uhlenbrook, S. (author) journal article 2007
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Fenicia, F. (author), Savenije, H.H.G. (author), Matgen, P. (author), Pfister, L. (author)A conceptual hydrological model structure contains several parameters that have to be estimated through matching observed and modeled watershed behavior in a calibration process. The requirement that a model simulation matches different aspects of system response at the same time has led the calibration problem toward a multiobjective approach....journal article 2007
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Fenicia, F. (author), Savenije, H.H.G. (author), Matgen, P. (author), Pfister, L. (author)Lack of data is one of the main limitations for hydrological modeling. However, it is often used as a justification for over simplifying, poorly performing models. If we want to enhance our understanding of hydrological systems, it is important to fully exploit the information contained in the available data, and to learn from model deficiencies...journal article 2008
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Savenije, H.H.G. (author)Hydrological modelling is the same as developing and encoding a hydrological theory. A hydrological model is not a tool but a hypothesis. The whole discussion about the inadequacy of hydrological models we have witnessed of late, is related to the wrong concept of what a model is. Good models don't exist. Instead of looking for the "best" model,...journal article 2008
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Ngigi, S.N. (author), Savenije, H.H.G. (author), Gichuki, F.N. (author)The upper Ewaso Ng’iro basin, which starts from the central highlands of Kenya and stretches northwards transcending different climatic zones, has experienced decreasing river flows for the last two decades. The Naro Moru sub-basin is used to demonstrate the looming water crisis in this water scarce river basin. The objective of the study was to...journal article 2008
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Liu, J. (author), Savenije, H.H.G. (author)It is widely recognized that food consumption patterns significantly impact water requirements. The aim of this paper is to quantify how food consumption patterns influence water requirements in China. The findings show that per capita water requirement for food (CWRF) has increased from 255 m3 cap-1y?1 in 1961 to 860 m3 cap-1 y?1 in 2003,...journal article 2008
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Fenicia, F. (author), McDonnell, J.J. (author), Savenije, H.H.G. (author)A priori determined model structures are common in catchment rainfall-runoff modeling. While this has resulted in many ready-to-use modeling tools, there are several shortcomings of a one-size-fits-all model structure. The uniqueness of catchments with respect to their hydrological behavior and the need to adapt model complexity to data...journal article 2008
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Van der Wegen, M. (author), Wang, Z.B. (author), Savenije, H.H.G. (author), Roelvink, J.A. (author)The morphodynamic system in alluvial, coastal plain estuaries is complex and characterized by various timescales and spatial scales. The current research aims to investigate the interaction between these different scales as well as the estuarine morphodynamic evolution. Use is made of a process-based, numerical model describing 2-D shallow water...journal article 2008
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Schoups, G. (author), Van de Giesen, N.C. (author), Savenije, H.H.G. (author)A common concern in hydrologic modeling is overparameterization of complex models given limited and noisy data. This leads to problems of parameter nonuniqueness and equifinality, which may negatively affect prediction uncertainties. A systematic way of controlling model complexity is therefore needed. We compare three model complexity control...journal article 2008
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Savenije, H.H.G. (author), Toffolon, M. (author), Haas, J. (author), Veling, E.J.M. (author)Analytical solutions of the one-dimensional hydrodynamic equations for tidal wave propagation are now available and, in this paper, presented in explicit equations. For given topography, friction, and tidal amplitude at the downstream boundary, the velocity amplitude, the wave celerity, the tidal damping, and the phase lag can be computed. The...journal article 2008
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Klees, R. (author), Liu, X. (author), Wittwe, T. (author), Gunter, B.C. (author), Revtova, E.A. (author), Tenzer, R. (author), Ditmar, P. (author), Winsemius, H.C. (author), Savenije, H.H.G. (author)When using GRACE as a tool for hydrology, many different gravity field model products are now available to the end user. The traditional spherical harmonics solutions produced from GRACE are typically obtained through an optimization of the gravity field data at the global scale, and are generated by a number of processing centers around the...journal article 2008
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Friesen, J.C. (author), Van Beek, C. (author), Selker, J. (author), Savenije, H.H.G. (author), Van de Giesen, N. (author)A method for measuring whole-tree interception of precipitation is presented which employs mechanical displacement sensors to measure trunk compression caused by the water captured by the tree. This direct and nondestructive method is demonstrated to be sensitive to less than 5 kg of interception field tests in Netherlands and Ghana.journal article 2008
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Winsemius, H.C. (author), Savenije, H.H.G. (author), Bastiaanssen, W.G.M. (author)OA-fund In this study, land surface related parameter distributions of a conceptual semi-distributed hydrological model are constrained by employing time series of satellite-based evaporation estimates during the dry season as explanatory information. The approach has been applied to the ungauged Luangwa river basin (150 000 (km)2) in Zambia....journal article 2008
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- Klees, R. (author), Revtova, E. (author), Gunter, B.C. (author), Ditmar, P.G. (author), Oudman, R.J. (author), Winsemius, H.C. (author), Savenije, H.H.G. (author) journal article 2008
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Gerrits, A.M.J. (author), Savenije, H.H.G. (author), Veling, E.J.M. (author), Pfister, L. (author)The Budyko curve is often used to estimate the actual evaporation as a function of the aridity index in a catchment. Different empirical equations exist to describe this relationship; however, these equations have very limited physical background. The model concept presented in this paper is physically based and uses only measurable parameters....journal article 2009
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Mul, M.L. (author), Savenije, H.H.G. (author), Uhlenbrook, S. (author)OA fund TU Delft This paper describes an extreme flood event that occurred in the South Pare Mountains in northern Tanzania. A high spatial and temporal resolution data set has been gathered in a previously ungauged catchment. This data was analysed using a multi-method approach, to gather information about the processes that generated the flood...journal article 2009
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Fenicia, F. (author), Savenije, H.H.G. (author), Avdeeva, Y. (author)OA-Fund TU Delft The objective of this paper is to investigate the time variability of catchment characteristics in the Meuse basin through its effect on catchment response. The approach uses a conceptual model to represent rainfall-runoff behaviour of this catchment, and evaluates possible time-dependence of model parameters. The main...journal article 2009
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Winsemius, H.C. (author), Schaefli, B. (author), Montanari, A. (author), Savenije, H.H.G. (author)This paper presents a calibration framework based on the generalized likelihood uncertainty estimation (GLUE) that can be used to condition hydrological model parameter distributions in scarcely gauged river basins, where data is uncertain, intermittent or nonconcomitant. At the heart of this framework is the conditioning of the model parameters...journal article 2009
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- Savenije, H.H.G. (author), Bohté, R. (author), Mul, M.L. (author), Bogaard, T.A. (author), Uhlenbrook, S. (author), Kessler, T.C. (author) journal article 2010
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Uhlenbrook, S. (author), Savenije, H.H.G. (author), Makurira, H. (author)Smallholder rainfed farming systems generally realise sub-optimal crop yields which are largely attributed to dry spell occurrences during crop growth stages. However, through the introduction of appropriate farming practices, it is possible to substantially increase yield levels even with little and highly variable rainfall. The presented...journal article 2010