Searched for: author%3A%22Savenije%2C+Hubert%22
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Zimba, H.M. (author), Coenders-Gerrits, Miriam (author), Kawawa, Banda (author), Schilperoort, B. (author), van de Giesen, N.C. (author), Nyambe, Imasiku (author), Savenije, Hubert (author)
The trend and magnitude of actual evaporation across the phenophases of miombo woodlands are unknown. This is because estimating evaporation in African woodland ecosystems continues to be a challenge, as flux observation towers are scant if not completely lacking in most ecosystems. Furthermore, significant phenophase-based discrepancies in both...
journal article 2023
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Gao, Hongkai (author), Fenicia, Fabrizio (author), Savenije, Hubert (author)
Traditional hydrological theories are based on the assumption that soil is key in determining water's fate in the hydrological cycle. According to these theories, soil hydraulic properties determine water movement in both saturated and unsaturated zones, described by matrix flow formulas such as the Darcy–Richards equations. They also determine...
journal article 2023
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Samboko, H.T. (author), Schurer, S. (author), Savenije, Hubert (author), Makurira, Hodson (author), Kawawa, Banda (author), Winsemius, H.C. (author)
Uncrewed aerial vehicles (UAVs), affordable precise global navigation satellite system hardware, multi-beam echo sounders, open-source 3D hydrodynamic modelling software, and freely available satellite data have opened up opportunities for a robust, affordable, physics-based approach to monitoring river flows. Traditional methods of river...
journal article 2023
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Sriwongsitanon, Nutchanart (author), Jandang, Wasana (author), Williams, James (author), Suwawong, Thienchart (author), Maekan, Ekkarin (author), Savenije, Hubert (author)
A parsimonious semi-distributed rainfall–runoff model has been developed for flow prediction. In distribution, attention is paid to both the timing of the runoff and the heterogeneity of moisture storage capacities within sub-catchments. This model is based on the lumped FLEXL model structure, which has proven its value in a wide range of...
journal article 2023
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Bouaziz, L.J.E. (author), Aalbers, Emma (author), Weerts, Albrecht H. (author), Hegnauer, Mark (author), Buiteveld, Hendrik (author), Lammersen, Rita (author), Stam, Jasper (author), Sprokkereef, Eric (author), Savenije, Hubert (author), Hrachowitz, M. (author)
Future hydrological behavior in a changing world is typically predicted based on models that are calibrated on past observations, disregarding that hydrological systems and, therefore, model parameters may change as well. In reality, hydrological systems experience almost continuous change over a wide spectrum of temporal and spatial scales. In...
journal article 2022
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Samboko, H.T. (author), Schurer, S. (author), Savenije, Hubert (author), Makurira, H. (author), Banda, K. (author), Winsemius, H.C. (author)
Rapid modern technological advancements have led to significant improvements in river monitoring using unmanned aerial vehicles (UAVs), photogrammetric reconstruction software, and low-cost real-time kinematic Global Navigation Satellite System (RTK GNSS) equipment. UAVs allow for the collection of dry bathymetric data in environments that are...
journal article 2022
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Schilperoort, B. (author), Coenders-Gerrits, Miriam (author), JIMENEZ RODRIGUEZ, C.D. (author), van Hooft, J.A. (author), van de Wiel, B.J.H. (author), Savenije, Hubert (author)
Despite the importance of forests in the water and carbon cycles, accurately measuring their contribution remains challenging, especially at night. During clear-sky nights current models and theories fail, as non-turbulent flows and spatial heterogeneity become more important. One of the standing issues is the ‘decoupling’ of the air masses...
journal article 2022
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Gao, Hongkai (author), Han, Chuntan (author), Chen, Rensheng (author), Feng, Zijing (author), Wang, Kang (author), Fenicia, Fabrizio (author), Savenije, Hubert (author)
Increased attention directed at frozen soil hydrology has been prompted by climate change. In spite of an increasing number of field measurements and modeling studies, the impact of frozen soil on hydrological processes at the catchment scale is still unclear. However, frozen soil hydrology models have mostly been developed based on a bottom...
journal article 2022
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Gharari, Shervan (author), Gupta, Hoshin V. (author), Clark, Martyn P. (author), Hrachowitz, M. (author), Fenicia, Fabrizio (author), Matgen, Patrick (author), Savenije, Hubert (author)
Process-based hydrological models seek to represent the dominant hydrological processes in a catchment. However, due to unavoidable incompleteness of knowledge, the construction of “fidelius” process-based models depends largely on expert judgment. We present a systematic approach that treats models as hierarchical assemblages of hypotheses ...
journal article 2021
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JIMENEZ RODRIGUEZ, C.D. (author), Coenders-Gerrits, Miriam (author), Schilperoort, B. (author), del Pilar González-Angarita, Adriana (author), Savenije, Hubert (author)
Forest evaporation exports a vast amount of water vapor from land ecosystems into the atmosphere. Meanwhile, evaporation during rain events is neglected or considered of minor importance in dense ecosystems. Air convection moves the water vapor upwards leading to the formation of large invisible vapor plumes, while the identification of...
journal article 2021
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Hulsman, P. (author), Savenije, Hubert (author), Hrachowitz, M. (author)
Study region: The study area is the river basin upstream of the Kariba dam located in the Zambezi River at the border of Zambia and Zimbabwe. Study focus: During the dry season of 2019 in Sub-Saharan Africa, extremely low water levels occurred in the Zambezi. According to news media, locals perceived this drought as the worst in several...
journal article 2021
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Bouaziz, L.J.E. (author), Fenicia, Fabrizio (author), Thirel, Guillaume (author), de Boer-Euser, Tanja (author), Buitink, Joost (author), Brauer, Claudia C. (author), De Niel, Jan (author), Savenije, Hubert (author), Hrachowitz, M. (author)
Streamflow is often the only variable used to evaluate hydrological models. In a previous international comparison study, eight research groups followed an identical protocol to calibrate 12 hydrological models using observed streamflow of catchments within the Meuse basin. In the current study, we quantify the differences in five states and...
journal article 2021
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Hulsman, P. (author), Hrachowitz, M. (author), Savenije, Hubert (author)
In the Luangwa basin in Zambia, long-term total water storage variations were observed with Gravity Recovery and Climate Experiment, but not reproduced by a standard conceptual hydrological model that encapsulates our current understanding of the dominant regional hydrological processes. The objective of this study was to identify potential...
journal article 2021
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Hulsman, P. (author), Savenije, Hubert (author), Hrachowitz, M. (author)
Satellite observations can provide valuable information for a better understanding of hydrological processes and thus serve as valuable tools for model structure development and improvement. While model calibration and evaluation have in recent years started to make increasing use of spatial, mostly remotely sensed information, model...
journal article 2021
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Schilperoort, B. (author), Coenders-Gerrits, Miriam (author), JIMENEZ RODRIGUEZ, C.D. (author), van der Tol, Christiaan (author), van de Wiel, B.J.H. (author), Savenije, Hubert (author)
Complex ecosystems such as forests make accurately measuring atmospheric energy and matter fluxes difficult. One of the issues that can arise is that parts of the canopy and overlying atmosphere can be turbulently decoupled from each other, meaning that the vertical exchange of energy and matter is reduced or hampered. This complicates flux...
journal article 2020
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Dembele, M. (author), Hrachowitz, M. (author), Savenije, Hubert (author), Mariéthoz, Grégoire (author), Schaefli, Bettina (author)
Hydrological model calibration combining Earth observations and in situ measurements is a promising solution to overcome the limitations of the traditional streamflow-only calibration. However, combining multiple data sources in model calibration requires a meaningful integration of the data sets, which should harness their most reliable...
journal article 2020
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Bouaziz, L.J.E. (author), Steele-Dunne, S.C. (author), Schellekens, Jaap (author), Weerts, Albrecht H. (author), Stam, Jasper (author), Sprokkereef, Eric (author), Winsemius, H.C. (author), Savenije, Hubert (author), Hrachowitz, M. (author)
The spatiotemporal dynamics of water volumes stored in the unsaturated root zone are a key control on the response of terrestrial hydrological systems. Robust, catchment-scale root-zone soil moisture estimates are thus critical for reliable predictions of river flow, groundwater recharge, or evaporation. Satellites provide estimates of near...
journal article 2020
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Samboko, H.T. (author), Abas, I. (author), Luxemburg, W.M.J. (author), Savenije, Hubert (author), Makurira, H. (author), Banda, K. (author), Winsemius, H.C. (author)
Rapid advancements in technologies open up possibilities for water resource authorities to increase their ability to accurately, safely and efficiently establish river flow observation through remote and non-intrusive observation methods. Low-cost Unmanned Aerial Vehicles (UAVS) in combination with Global Navigation Satellite Systems (GNSS) can...
journal article 2020
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JIMENEZ RODRIGUEZ, C.D. (author), Coenders-Gerrits, Miriam (author), Wenninger, J.W. (author), Gonzalez-Angarita, Adriana (author), Savenije, Hubert (author)
Tropical wet forests are complex ecosystems with a large number of plant species. These environments are characterized by a high water availability throughout the whole year and a complex canopy structure. However, how the different sections of the canopy contribute to total evaporation is poorly understood. The aim of this work is to...
journal article 2020
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Hulsman, P. (author), Winsemius, H.C. (author), Michailovsky, Claire I. (author), Savenije, Hubert (author), Hrachowitz, M. (author)
Limited availability of ground measurements in the vast majority of river basins world-wide increases the value of alternative data sources such as satellite observations in hydrological modelling. This study investigates the potential of using remotely sensed river water levels, i.e. altimetry observations, from multiple satellite missions...
journal article 2020
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