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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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Jöbsis, Huygen J. (author), Caselli, V.M. (author), Askes, Sven H.C. (author), Garnett, Erik C. (author), Savenije, T.J. (author), Rabouw, Freddy T. (author), Hutter, Eline M. (author)
Cs<sub>2</sub>AgBiBr<sub>6</sub> (CABB) has been proposed as a promising nontoxic alternative to lead halide perovskites. However, low charge carrier collection efficiencies remain an obstacle for the incorporation of this material in optoelectronic applications. In this work, we study the optoelectronic properties of CABB thin films using...
journal article 2021
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Zhao, J. (author), Caselli, V.M. (author), Bus, M. (author), Boshuizen, B. (author), Savenije, T.J. (author)
Wide-band-gap perovskites such as methylammonium lead bromide (MAPB) are promising materials for tandem solar cells because of their potentially high open-circuit voltage, which is yet still far below the maximum limit. The relatively short charge-carrier lifetimes deduced from time-resolved photoluminescence (TRPL) measurements seem in...
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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Lin, Yuze (author), Li, Tao (author), Liu, Ye (author), Bahrami, Behzad (author), Guo, Dengyang (author), Fang, Yanjun (author), Shao, Yuchuan (author), Wang, Qi (author), Savenije, T.J. (author)
A long photoluminescence decay lifetime has been regarded as a generic indication of long charge carrier recombination lifetime in semiconductors such as metal halide perovskites (MHPs), which have shown tremendous success in solar cells. Here, we report that MHP polycrystalline films with extrinsic metal ions have a very long charge...
journal article 2021
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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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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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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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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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Felter, K.M. (author), Fravventura, Maria C. (author), Koster, Emma (author), Abellon, R.D. (author), Savenije, T.J. (author), Grozema, F.C. (author)
In this contribution we demonstrate a solid-state approach to triplet-triplet annihilation upconversion for application in a solar cell device in which absorption of near-infrared light is followed by direct electron injection into an inorganic substrate. We use time-resolved microwave photoconductivity experiments to study the injection of...
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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Zimba, H.M. (author), Coenders-Gerrits, Miriam (author), Kawawa, Banda (author), Savenije, Hubert (author), Nyambe, Imasiku (author), Winsemius, H.C. (author)
Understanding the canopy cover relationship with canopy water content and canopy temperature in the Miombo ecosystem is important for studying the consequences of climate change. To better understand these relationships, we studied the satellite data-based land surface temperature (LST) as proxy for canopy temperature, leaf area index (LAI),...
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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Savenije, Hubert (author), van der Zaag, P. (author)
Arjen Hoekstra postulated in 2001 that the value of water accumulates in an upstream direction: water value flows upstream. The ultimate source of this value is the rain. This original idea he used to develop the water value-flow concept. This article shows that the water value-flow concept has much to offer in terms of contemporary...
journal article 2020
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van Ramshorst, Justus G.V. (author), Coenders-Gerrits, Miriam (author), Schilperoort, B. (author), van de Wiel, B.J.H. (author), Izett, J.G. (author), Selker, J.S. (author), Higgins, Chad W. (author), Savenije, Hubert (author), van de Giesen, N.C. (author)
Near-surface wind speed is typically only measured by point observations. The actively heated fiber-optic (AHFO) technique, however, has the potential to provide high-resolution distributed observations of wind speeds, allowing for better spatial characterization of fine-scale processes. Before AHFO can be widely used, its performance needs...
journal article 2020
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Caselli, V.M. (author), Wei, Z. (author), Ackermans, M.M. (author), Hutter, E.M. (author), Ehrler, Bruno (author), Savenije, T.J. (author)
To further understand the optoelectronic properties of metal halide perovskites, we investigate sub-bandgap absorption in methylammonium lead iodide (MAPbI3) films. Charge carrier dynamics are studied using time-resolved microwave conductivity measurements using sub-bandgap excitation. From changes in the decay dynamics as a function of...
journal article 2020
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Pail, R. (author), Bamber, J. (author), Biancale, R. (author), Bingham, R. (author), Braitenberg, C. (author), Flechtner, F. (author), Gruber, T. (author), Güntner, A. (author), Savenije, Hubert (author)
As changes in gravity are directly related to mass variability, satellite missions observing the Earth's time varying gravity field are a unique tool for observing mass transport processes in the Earth system, such as the water cycle, rapid changes in the cryosphere, oceans, and solid Earth processes, on a global scale. The observation of...
journal article 2019
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