Searched for:
(81 - 93 of 93)

Pages

document
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
document
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
document
Steele-Dunne, S.C. (author), Van de Giesen, N.C. (author)
journal article 2008
document
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
document
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
document
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
document
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
document
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
document
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
document
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
document
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
document
Amisigo, B.A. (author), Van de Giesen, N.C. (author)
journal article 2005
document
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
Searched for:
(81 - 93 of 93)

Pages