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Montanari, A. (author), Shoemaker, C.A. (author), Van de Giesen, N.C. (author)
This paper introduces the Water Resources Research special section on Uncertainty Assessment in Surface and Subsurface Hydrology. Over the past years, hydrological literature has seen a large increase in the number of papers dealing with uncertainty. In this article, we present an overview of the different sources of uncertainty and the...
journal article
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Liebe, J. (author), Van de Giesen, N. (author), Andreini, M. (author)
In semi-arid regions at the margins of the Sahel, large numbers of small reservoirs capture surface runoff during the rainy season, making water available during the dry season. For the local population, small reservoirs are important water sources which help them cope with droughts. The lack of knowledge of the number of existing reservoirs,...
journal article 2005
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Amisigo, B.A. (author), Van de Giesen, N.C. (author)
journal article 2005
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Winsemius, H.C. (author), Savenije, H.H.G. (author), Van de Giesen, N.C. (author), Van den Hurk, B.J.J.M. (author), Zapreeva, E.A. (author), Klees, R. (author)
The temporal signature of terrestrial storage changes inferred from the Gravity Recovery and Climate Experiment (GRACE) has been assessed by comparison with outputs from a calibrated hydrological model (lumped elementary watershed (LEW)) of the upper Zambezi and surroundings and an inspection of the within?month ground track coverage of GRACE...
journal article 2006
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Selker, J.S. (author), Thévenaz, L. (author), Huwald, H. (author), Mallet, A. (author), Luxemburg, W.M.J. (author), Van de Giesen, N. (author), Stejskal, M. (author), Zeman, J. (author), Westhoff, M. (author), Parlange, M.B. (author)
Instruments for distributed fiber-optic measurement of temperature are now available with temperature resolution of 0.01°C and spatial resolution of 1 m with temporal resolution of fractions of a minute along standard fiber-optic cables used for communication with lengths of up to 30,000 m. We discuss the spectrum of fiber-optic tools that may...
journal article 2006
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Selker, J. (author), Van de Giesen, N.C. (author), Westhoff, M. (author), Luxemburg, W. (author), Parlange, M.B. (author)
A new approach to monitoring surface waters using distributed fiber optic temperature sensing is presented, allowing resolutions of temperature of 0.01°C every meter along a fiber optic cable of up to 10,000 m in length. We illustrate the potential of this approach by quantifying both stream temperature dynamics and groundwater inflows to the...
journal article 2006
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Friesen, J. (author), Rodgers, C. (author), Oguntunde, P.G. (author), Hendrickx, J.M.H. (author), Van de Giesen, N. (author)
In West Africa, which is an extremely moisturelimited region, soil water information plays a vital role in hydrologic and meteorologic modeling for improved water resource planning and food security. Recent and upcoming satellite missions, such as SMOS and MetOp, hold promise for the regional observation of soil moisture. The resolution of the...
journal article 2008
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Schoups, G. (author), Van de Giesen, N.C. (author), Savenije, H.H.G. (author)
A common concern in hydrologic modeling is overparameterization of complex models given limited and noisy data. This leads to problems of parameter nonuniqueness and equifinality, which may negatively affect prediction uncertainties. A systematic way of controlling model complexity is therefore needed. We compare three model complexity control...
journal article 2008
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Raadgever, G.T. (author), Mostert, E. (author), Van de Giesen, N.C. (author)
OA fund TU Delft This article identifies different stakeholder perspectives on future flood management in the downstream parts of the Rhine basin in Germany and The Netherlands. The perspectives were identified using Q methodology, which proved to be a good, but time-intensive, method for eliciting and analyzing stakeholder perspectives in a...
journal article 2008
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Friesen, J.C. (author), Van Beek, C. (author), Selker, J. (author), Savenije, H.H.G. (author), Van de Giesen, N. (author)
A method for measuring whole-tree interception of precipitation is presented which employs mechanical displacement sensors to measure trunk compression caused by the water captured by the tree. This direct and nondestructive method is demonstrated to be sensitive to less than 5 kg of interception field tests in Netherlands and Ghana.
journal article 2008
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Steele-Dunne, S.C. (author), Van de Giesen, N.C. (author)
journal article 2008
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Liebe, J.R. (author), Van de Giesen, N.C. (author), Andreini, M. (author), Walter, M.T. (author), Steenhuis, T.S. (author)
In the semiarid regions of Africa, there are many small reservoirs used for irrigation. This study explores the practicality of using small reservoirs as runoff gauges by estimating their water storage changes using remote sensing imagery. A simple rainfall-runoff model is developed by observing the surface area and estimating the volume of...
journal article 2009
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Steele-Dunne, S.C. (author), Rutten, M.M. (author), Krzeminska, D.M. (author), Hausner, M. (author), Tyler, S.W. (author), Selker, J. (author), Bogaard, T.A. (author), Van de Giesen, N.C. (author)
Through its role in the energy and water balances at the land surface, soil moisture is a key state variable in surface hydrology and land?atmosphere interactions. Point observations of soil moisture are easy to make using established methods such as time domain reflectometry and gravimetric sampling. However, monitoring large?scale variability...
journal article 2010
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Sayde, C. (author), Gregory, C. (author), Gil-Rodriguez, M. (author), Tufillaro, N. (author), Tyler, S. (author), Van de Giesen, N.C. (author), English, M. (author), Cuenca, R. (author), Selker, J.S. (author)
Accurate methods are needed to measure changing soil water content from meter to kilometer scales. Laboratory results demonstrate the feasibility of the heat pulse method implemented with fiber optic temperature sensing to obtain accurate distributed measurements of soil water content. A fiber optic cable with an electrically conductive armoring...
journal article 2010
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Schoups, G.H.W. (author), Vrugt, J.A. (author), Fenicia, F. (author), Van de Giesen, N.C. (author)
Conceptual rainfall?runoff models have traditionally been applied without paying much attention to numerical errors induced by temporal integration of water balance dynamics. Reliance on first?order, explicit, fixed?step integration methods leads to computationally cheap simulation models that are easy to implement. Computational speed is...
journal article 2010
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Romero, Y.L. (author), Bessembinder, J. (author), Van de Giesen, N.C. (author), Van de Ven, F.H.M. (author)
The Royal Netherlands Meteorological Institute (KNMI) has published the KNMI’06 climate scenarios in 2006. These scenarios give the possible states of the climate in The Netherlands for the next century. Projections of changes in precipitation were made for a time scale of 1 day. The urban drainage sector is, however, more interested in...
journal article 2010
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Weijs, S.V. (author), Schoups, G. (author), Van de Giesen, N. (author)
journal article 2010
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Petrides, A.C. (author), Huff, J. (author), Arik, A. (author), Van de Giesen, N.C. (author), Kennedy, A.M. (author), Thomas, C.K. (author), Selker, J.S. (author)
The characterization of temporal and spatial distribution of sunlight is essential for understanding energy transport in natural ecosystems. Fiber?optic distributed temperature sensing (DTS) allows meter resolution measurements of temperature at subminute resolution. The difference in temperature due to absorption and reflection of a pair of...
journal article 2011
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Oguntunde, P.G. (author), fasinmirin, J.T. (author), Van de Giesen, N.C. (author)
Data on water relations and growth characteristics of mango trees needed for productive plantation management are currently lacking in West Africa. Relationships between allometric properties and water use in mango trees were examined. In addition, the effects on allometric characteristics and xylem sap flow were investigated in a mixed...
journal article 2011
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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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