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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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Ssenyunzi, Richard Cliffe (author), Oruru, Bosco (author), D'ujanga, Florence Mutonyi (author), Realini, Eugenio (author), Barindelli, Stefano (author), Tagliaferro, Giulio (author), van de Giesen, N.C. (author)The Global Navigation Satellite System (GNSS) can be used to derive accurately the Zenith Tropospheric Delay (ZTD) under all-weather conditions. The derived ZTDs play a vital role in climate studies, weather forecasting and are operationally assimilated into numerical weather prediction models. In this study, variations and statistical...journal article 2019
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Cristiano, E. (author), ten Veldhuis, Marie-claire (author), Wright, Daniel B. (author), Smith, James A. (author), van de Giesen, N.C. (author)Interactions between spatial and temporal variability of rainfall and catchment characteristics strongly influence hydrological response. In urban areas, where runoff generation is fast due to high imperviousness degree, it is especially relevant to capture the high spatiotemporal rainfall variability. Significant progress has been made in...journal article 2019
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Davids, J.C. (author), Rutten, M.M. (author), Pandey, Anusha (author), Devkota, Nischal (author), David Van Oyen, Wessel (author), Prajapati, Rajaram (author), van de Giesen, N.C. (author)Wise management of water resources requires data. Nevertheless, the amount of streamflow data being collected globally continues to decline. Generating hydrologic data together with citizen scientists can help fill this growing hydrological data gap. Our aim herein was to (1) perform an initial evaluation of three simple streamflow measurement...journal article 2019
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Davids, J.C. (author), Devkota, Nischal (author), Pandey, Anusha (author), Prajapati, Rajaram (author), Ertis, Brandon A. (author), Rutten, M.M. (author), Lyon, Steve W. (author), Bogaard, T.A. (author), van de Giesen, N.C. (author)Citizen science, as a complement to ground-based and remotely-sensed precipitation measurements, is a promising approach for improving precipitation observations. During the 2018 monsoon (May to September), SmartPhones4Water (S4W) Nepal—a young researcher-led water monitoring network—partnered with 154 citizen scientists to generate 6,656...journal article 2019
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Tian, X. (author), ten Veldhuis, Marie-claire (author), Schleiss, M.A. (author), Bouwens, Christian (author), van de Giesen, N.C. (author)Urban pluvial flooding is one of the most costly natural hazards worldwide. Risks of flooding are expected to increase in the future due to global warming and urbanization. The complexity of the involved processes and the lack of long-term field observations means that many crucial aspects related to urban flood risks still remain poorly...journal article 2019
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Solcerova, A. (author), van de Ven, F.H.M. (author), van de Giesen, N.C. (author)One of the processes by which open water cools the air during hot summer days is by storing the heat and increasing its own temperature. This heat is then released at night. The aim of this paper is to analyze this cooling process by quantifying the magnitude of turbulent, latent and sensible, heat fluxes in comparison to radiative and ground...journal article 2019
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Thanda Thatoe Nwe Win, T.T.N.W. (author), Bogaard, T.A. (author), van de Giesen, N.C. (author)Newly developed mobile phone applications in combination with citizen science are used in different fields of research, such as public health monitoring, environmental monitoring, precipitation monitoring, noise pollution measurement and mapping, earth observation. In this paper, we present a low-cost water quality mobile phone measurement...journal article 2019
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Aydin, B.E. (author), Hagedooren, Hugo (author), Rutten, M.M. (author), Delsman, Joost (author), Essink, Gualbert H.P.Oude (author), van de Giesen, N.C. (author), Abraham, E. (author)We present a systematic approach for salinity sensor placement in a polder network, where the objective is to estimate the unmeasured salinity levels in the main polder channels. We formulate this problem as optimization of the estimated salinity levels using root mean square error (RMSE) as the "goodness of fit" measure. Starting from a...journal article 2019
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le Coz, C.M.L. (author), Heemink, A.W. (author), Verlaan, M. (author), ten Veldhuis, Marie-claire (author), van de Giesen, N.C. (author)Rainfall estimates based on satellite data are subject to errors in the position of the rainfall events in addition to errors in their intensity. This is especially true for localized rainfall events such as the convective rainstorms that occur during the monsoon season in sub-Saharan Africa. Many satellite-based estimates use gauge...journal article 2019
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le Coz, C.M.L. (author), van de Giesen, N.C. (author)An ever-increasing number of rainfall estimates is available. They are used in many important applications such as flood/drought monitoring, water management, or climate monitoring. Such data are especially valuable in sub-Saharan Africa, where rainfall has considerable socioeconomic impacts and the gauge and radar networks are sparse. The...journal article 2019
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van der Horst, T. (author), Rutten, M.M. (author), van de Giesen, N.C. (author), Hanssen, R.F. (author)Inhabitants and ecosystems in delta areas are becoming increasingly vulnerable to the effects of subsidence, caused by anthropogenic activities. Yangon is a city on the periphery of the Irrawaddy delta in Myanmar where little is known about the true extent of this hazard, while its effects can potentially harm millions of its inhabitants. This...journal article 2018
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Krietemeyer, A. (author), ten Veldhuis, Marie-claire (author), van der Marel, H. (author), Realini, Eugenio (author), van de Giesen, N.C. (author)Dual-frequency Global Navigation Satellite Systems (GNSSs) enable the estimation of Zenith Tropospheric Delay (ZTD) which can be converted to PrecipitableWater Vapor (PWV). The density of existing GNSS monitoring networks is insufficient to capture small-scale water vapor variations that are especially important for extreme weather...journal article 2018
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Solcerova, A. (author), van Emmerik, T.H.M. (author), Hilgersom, K.P. (author), van de Ven, F.H.M. (author), van de Giesen, N.C. (author)The urban heat island effect was first described 200 years ago, but the development of ways to mitigate heat in urban areas reaches much further into the past. Uchimizu is a 17th century Japanese tradition, in which water is sprinkled around houses to cool the ground surface and air by evaporation. Unfortunately, the number of published studies...journal article 2018
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Cristiano, E. (author), ten Veldhuis, Marie-claire (author), Gaitan Sabogal, S. (author), Ochoa Rodriguez, Susana (author), van de Giesen, N.C. (author)Rainfall variability in space and time, in relation to catchment characteristics and model complexity, plays an important role in explaining the sensitivity of hydrological response in urban areas. In this work we present a new approach to classify rainfall variability in space and time and we use this classification to investigate rainfall...journal article 2018
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Abbasi, A. (author), Annor, F.O. (author), van de Giesen, N.C. (author)A 3-D numerical method is developed to investigate the spatial distribution of surface fluxes over heterogeneous surfaces in (semi-)arid regions. Quantifying the effects of changes in the momentum, thermal and moisture roughness lengths on the airflow and fluxes in the ABL is important for water resources management and local climate studies....journal article 2018
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Hilgersom, K.P. (author), Zijlema, Marcel (author), van de Giesen, N.C. (author)The three-dimensional (3-D) modelling of water systems involving double-diffusive processes is challenging due to the large computation times required to solve the flow and transport of constituents. In 3-D systems that approach axisymmetry around a central location, computation times can be reduced by applying a 2-D axisymmetric model set-up....journal article 2018
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Tauro, Flavia (author), Selker, J.S. (author), van de Giesen, N.C. (author), Abrate, Tommaso (author), Uijlenhoet, R. (author), Porfiri, Maurizio (author), Manfreda, Salvatore (author), Caylor, Kelly (author), Moramarco, Tommaso (author), Benveniste, Jerome (author), Ciraolo, Giuseppe (author), Estes, Lyndon (author), Domeneghetti, Alessio (author), Perks, Matthew T. (author), Corbari, Chiara (author), Rabiei, Ehsan (author), Ravazzani, Giovanni (author), Bogena, Heye (author), Harfouche, Antoine (author), Brocca, Luca (author), Maltese, Antonino (author), Wickert, Andy (author), Tarpanelli, Angelica (author), Good, Stephen (author), Lopez Alcala, Jose Manuel (author), Petroselli, Andrea (author), Cudennec, Christophe (author), Blume, Theresa (author), Hut, R.W. (author), Grimaldi, Salvatore (author)To promote the advancement of novel observation techniques that may lead to new sources of information to help better understand the hydrological cycle, the International Association of Hydrological Sciences (IAHS) established the Measurements and Observations in the XXI century (MOXXI) Working Group in July 2013. The group comprises a...journal article 2018
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- van Emmerik, T.H.M. (author), Steele-Dunne, S.C. (author), Guerin, Marceau (author), Gentine, Pierre (author), Oliveira, Rafael (author), Hut, R.W. (author), Selker, John (author), Wagner, Jim (author), van de Giesen, N.C. (author) journal article 2018
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Selker, J.S. (author), van de Giesen, N.C. (author), Annor, F.O. (author)There is a lack of weather and climate observation stations in Africa, while food production, harvest predictions, and disaster mitigation would benefit from improved data-accessible observation. A new smart and sustainable weather and climate observation network now addresses the important challenge of monitoring the weather in the continent.journal article 2018