Searched for: faculty%3A%22Civil%255C%252BEngineering%255C%252Band%255C%252BGeosciences%22
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Hut, R.W. (author), Tyler, S. (author), Van Emmerik, T.H.M. (author)
A prototype temperature-sensing pair of waders is introduced and tested. The water temperature at the streambed is interesting both for scientists studying the hyporheic zone and for, e.g., fishers spotting good fishing locations. A temperature sensor incorporated into waders worn by members of the public can give scientists an additional source...
journal article 2016
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Mollema, P.N. (author)
Gravel pit lakes form when gravel is excavated from below the water table of a phreatic or shallow confined aquifer. Typically many of these lakes are concentrated along naturally occurring sedimentary gravel deposits in areas where gravel is needed for construction. Most gravel pit lakes are relatively young features: most are less than 50...
doctoral thesis 2016
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Berghuijs, W.R. (author), Harrigan, S. (author), Kipnis, E.L. (author), Dogulu, N. (author), Floriancic, M. (author), Müller, H. (author), Pohle, I. (author), Saia, S.M. (author), Sedlar, F. (author), Smoorenburg, M. (author), Teutschbein, C. (author), Van Emmerik, T.H.M. (author)
The American Geophysical Union (AGU) and the European Geosciences Union (EGU) play central roles in nurturing the next generation of geoscientists. Students and young scientists make up about one quarter of the unions’ active memberships [American Geophysical Union, 2013; European Geosciences Union, 2014], creating a major opportunity to include...
journal article 2015
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Hut, R.W. (author), Tyler, S. (author), Van Emmerik, T.H.M. (author)
A prototype temperature sensing pair of waders is introduced and tested. The water temperature at the stream-bed is interesting both for scientist studying the hyporheic zone as well as for, e.g., fishers spotting good fishing locations. A temperature sensor incorporated in waders worn by members of the public can give scientists an additional...
journal article 2015
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Verkade, J.S. (author)
Flood early warning systems provide a potentially highly effective flood risk reduction measure. The effectiveness of early warning, however, is affected by forecasting uncertainty: the impossibility of knowing, in advance, the exact future state of hydrological systems. Early warning systems benefit from estimation of predictive uncertainties,...
doctoral thesis 2015
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Van Emmerik, T.H.M. (author), Dunne, S.C. (author), Judge, J. (author), van de Giesen, N.C. (author)
Microwave backscatter from vegetated surfaces is influenced by vegetation structure and vegetation water content (VWC), which varies with meteorological conditions and moisture in the root zone. Radar backscatter observations are used for many vegetation and soil moisture monitoring applications under the assumption that VWC is constant on short...
journal article 2014
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Donchyts, G. (author), Baart, F. (author), Van Dam, A. (author), De Goede, E. (author), Icke, J. (author), Putten, H. (author)
An overview paper, describes motivation and main deliverables of the Next Generation Hydro Software (NGHS) project. Important technological innovations include development of the new computational core Delft3D Flexible Mesh, as well as the open modelling environment Delta Shell.
conference paper 2014
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Hut, R.W. (author)
Advances in scientific understanding follow a cyclic pattern where new observational techniques lead to novel theoretical insight. From novel theories, in turn, hypotheses are derived that cannot be tested using current observations and thus create a demand for even newer observational techniques. Hydrology has recently experienced a period of...
doctoral thesis 2013
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De Kleermaeker, S. (author), Verkade, J.S. (author)
Often, water management decisions are based on hydrological forecasts, which are affected by inherent uncertainties. It is increasingly common for forecasters to make explicit estimates of these uncertainties. Associated benefits include the decision makers’ increased awareness of forecasting uncertainties and the potential for risk-based...
conference paper 2013
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Weijs, S.V. (author), Van de Giesen, N. (author), Parlange, M.B. (author)
From algorithmic information theory, which connects the information content of a data set to the shortest computer program that can produce it, it is known that there are strong analogies between compression, knowledge, inference and prediction. The more we know about a data generating process, the better we can predict and compress the data. A...
journal article 2013
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Rings, J. (author), Vrugt, J.A. (author), Schoups, G. (author), Huisman, J.A. (author), Vereecken, H. (author)
Bayesian model averaging (BMA) is a standard method for combining predictive distributions from different models. In recent years, this method has enjoyed widespread application and use in many fields of study to improve the spread-skill relationship of forecast ensembles. The BMA predictive probability density function (pdf) of any quantity of...
journal article 2012
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Van de Giesen, N.C. (author), Steele-Dunn, S.C. (author), Jansen, J. (author), Hoes, O.A.C. (author), Hausner, M.B. (author), Tyler, S. (author), Selker, J. (author)
Over the past five years, Distributed Temperature Sensing (DTS) along fiber optic cables using Raman backscattering has become an important tool in the environmental sciences. Many environmental applications of DTS demand very accurate temperature measurements, with typical RMSE < 0.1 K. The aim of this paper is to describe and clarify the...
journal article 2012
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Hausner, M.B. (author), Suarez, F. (author), Glander, K.E. (author), Van de Giesen, N.C. (author), Selker, J.S. (author), Tyler, S.W. (author)
Hydrologic research is a very demanding application of fiber-optic distributed temperature sensing (DTS) in terms of precision, accuracy and calibration. The physics behind the most frequently used DTS instruments are considered as they apply to four calibration methods for single-ended DTS installations. The new methods presented are more...
journal article 2011
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Masih, I. (author)
This study provides a hydrology based assessment of (surface) water resources and its continuum of variability and change at different spatio-temporal scales in the semi-arid Karkheh Basin, Iran, where water is scarce, competition among users is high and massive water resources development is under way. The study reveals that the ongoing...
doctoral thesis 2011
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Weijs, S.V. (author)
Operational management of water resources needs predictions of future behavior of water systems, to anticipate shortage or excess of water in a timely manner. Because the natural systems that are part of the hydrological cycle are complex, the predictions inevitably are subject to considerable uncertainty. Still, definitive decisions about e.g....
doctoral thesis 2011
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Hut, R.W. (author), Weijs, S.V. (author), Luxemburg, W.M.J. (author)
The $40 “Wiimote” (an input device belonging with the Nintendo® Wii™ game system) can be used by hydrologists as a sensor. The device contains three accelerometers and an infrared camera with built?in source tracking. It communicates by Bluetooth®. Because of the efforts of the hacking community it is now easy to let the Wiimote communicate with...
journal article 2010
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Hellebrand, H.G.W. (author)
The thesis treats a selection of hydrological studies, which make use of a variety of models and approaches that have a common character: simplicity. Simplicity implies parsimonious use of parameters. These studies offer opportunities for hydrological research that are not, or hardly achievable with more complex models and approaches. In the...
doctoral thesis 2010
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Wagener, T. (author), Sivapalan, M. (author), Troch, P.A. (author), McGlynn, B.L. (author), Harman, C.J. (author), Gupta, H.V. (author), Kumar, P. (author), Rao, P.S.C. (author), Basu, N.B. (author), Wilson, J.S. (author)
Human activities exert global-scale impacts on our environment with significant implications for freshwater-driven services and hazards for humans and nature. Our approach to the science of hydrology needs to significantly change so that we can understand and predict these implications. Such an adjustment is a necessary prerequisite for the...
journal article 2010
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Friesen, J.C. (author)
Soil moisture information is a vital parameter for water resources planning and food production. In particular for West Africa, where income largely depends on rainfed agriculture, reliable information on available soil water is required for modeling and prediction. Over large areas and, specifically, for data scarce regions, satellite soil...
doctoral thesis 2008
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Plug, W.J. (author), Slob, E.C. (author), Bruining, J. (author), Moreno Tirado, L.M. (author)
We present a tool that simultaneously measures the complex permittivity and the capillary pressure characteristics for multiphase flow. The sample holder is a parallel plate capacitor. A precision component analyzer is used to measure the impedance amplitude and phase angle as a function of frequency (1 kHz to 3 MHz). The complex impedance of...
journal article 2007
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