Search results | TU Delft Repositories

Hrachowitz, M. (author), Fovet, O. (author), Ruiz, L. (author), Euser, T. (author), Gharari, S. (author), Nijzink, R.C. (author), Savenije, H.H.G. (author), Gascuel-Odoux, C. (author)

journal article 2015

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The use of landscape variability in the mesoscale hydrologic model

Nijzink, R.C. (author), Hrachowitz, M. (author), Samaniego, L. (author), Savenije, H.H.G. (author)

journal article 2015

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Hydrological hysteresis in catchments and its value for assessing process consistency in conceptual models

Fovet, O. (author), Ruiz, L. (author), Hrachowitz, M. (author), Faucheux, M. (author), Gascuel-Odoux, C. (author)

While most hydrological models reproduce the general flow dynamics, they frequently fail to adequately mimic system-internal processes. In particular, the relationship between storage and discharge, which often follows annual hysteretic patterns in shallow hard-rock aquifers, is rarely considered in modelling studies. One main reason is that...

journal article 2015

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A constraint-based search algorithm for parameter identification of environmental models

Gharari, S. (author), Shafiei, M. (author), Hrachowitz, M. (author), Kumar, R. (author), Fenicia, F. (author), Gupta, H.V. (author), Savenije, H.H.G. (author)

Many environmental systems models, such as conceptual rainfall-runoff models, rely on model calibration for parameter identification. For this, an observed output time series (such as runoff) is needed, but frequently not available (e.g., when making predictions in ungauged basins). In this study, we provide an alternative approach for parameter...

journal article 2014

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Using expert knowledge to increase realism in environmental system models can dramatically reduce the need for calibration

Gharari, S. (author), Hrachowitz, M. (author), Fenicia, F. (author), Gao, H. (author), Savenije, H.H.G. (author)

Conceptual environmental system models, such as rainfall runoff models, generally rely on calibration for parameter identification. Increasing complexity of this type of models for better representation of hydrological process heterogeneity, typically makes parameter identification more difficult. Although various, potentially valuable,...

journal article 2014

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Climate controls how ecosystems size the root zone storage capacity at catchment scale

Gao, H. (author), Hrachowitz, M. (author), Schymanski, S.J. (author), Fenicia, F.F. (author), Sriwongsitanon, N. (author), Savenije, H.H.G. (author)

The root zone moisture storage capacity (SR) of terrestrial ecosystems is a buffer providing vegetation continuous access to water and a critical factor controlling land-atmospheric moisture exchange, hydrological response, and biogeochemical processes. However, it is impossible to observe directly at catchment scale. Here, using data from 300...

journal article 2014

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Process consistency in models: The importance of system signatures, expert knowledge, and process complexity

Hrachowitz, M. (author), Fovet, O. (author), Ruiz, L. (author), Euser, T. (author), Gharari, S. (author), Nijzink, R. (author), Freer, J. (author), Savenije, H.H.G. (author), Gascuel-Odoux, C. (author)

Hydrological models frequently suffer from limited predictive power despite adequate calibration performances. This can indicate insufficient representations of the underlying processes. Thus, ways are sought to increase model consistency while satisfying the contrasting priorities of increased model complexity and limited equifinality. In this...

journal article 2014

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Feedback versus uncertainty

Van Nooyen, R.R.P. (author), Hrachowitz, M. (author), Kolechkina, A.G. (author)

Even without uncertainty about the model structure or parameters, the output of a hydrological model run still contains several sources of uncertainty. These are: measurement errors affecting the input, the transition from continuous time and space to discrete time and space, which causes loss of information about the input, discretization of...

conference paper 2014

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Hydrological hysteresis in catchments and its value for assessing process consistency in conceptual models (discussions)

Fovet, O. (author), Ruiz, L. (author), Hrachowitz, M. (author), Faucheux, M. (author), Gascuel-Odoux, C. (author)

While most hydrological models reproduce the general flow dynamics, they frequently fail to adequately mimic system internal processes. In particular, the relationship between storage and discharge, which often follows annual hysteretic patterns in shallow hard-rock aquifers, is rarely considered in modelling studies. One main reason is that...

journal article 2014

document

Testing the realism of a topography-driven model (FLEX-Topo) in the nested catchments of the Upper Heihe, China

Gao, H. (author), Hrachowitz, M. (author), Fenicia, F.F. (author), Gharari, S. (author), Savenije, H.H.G. (author)

Although elevation data are globally available and used in many existing hydrological models, their information content is still underexploited. Topography is closely related to geology, soil, climate and land cover. As a result, it may reflect the dominant hydrological processes in a catchment. In this study, we evaluated this hypothesis...

journal article 2014

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Exploring the role of soil moisture conditions for rainfall triggered landslides on catchment scale: The case of the Ialomita sub carpathians, Romania

Chitu, Z. (author), Bogaard, T.A. (author), Adler, M.J. (author), Steele-Dunne, S.C. (author), Hrachowitz, M. (author), Busuioc, A. (author), Sandric, I. (author), Istrate, A. (author)

journal article 2014

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A strategy for “constraint-based” parameter specification for environmental models

Gharari, S. (author), Shafiei, M. (author), Hrachowitz, M. (author), Fenicia, F. (author), Gupta, H.V. (author), Savenije, H.H.G. (author)

Many environmental systems models, such as conceptual rainfall-runoff models, rely on model calibration for parameter identification. For this, an observed output time series (such as runoff) is needed, but frequently not available. Here, we explore another way to constrain the parameter values of semi-distributed conceptual models, based on two...

journal article 2013

document

Using expert knowledge to increase realism in environmental system models can dramatically reduce the need for calibration

Gharari, S. (author), Hrachowitz, M. (author), Fenecia, F. (author), Gao, H. (author), Savenije, H.H.G. (author)

Conceptual environmental systems models, such as rainfall runoff models, generally rely on calibration for parameter identification. Increasing complexity of this type of model for better representation of hydrological process heterogeneity typically makes parameter identification more difficult. Although various, potentially valuable,...

journal article 2013

document

Testing the realism of a topography driven model (flex-topo) in the nested catchments of the Upper Heihe, China

Gao, H. (author), Hrachowitz, M. (author), Fenicia, F.F. (author), Gharari, S. (author), Savenije, H.H.G. (author)

journal article 2013

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