Search Results - "de Rooij, Gerrit H"

A New Principle for Measuring the Average Relative Humidity in Large Volumes of Non-Homogenous Gas by Lazik, Detlef, de Rooij, Gerrit H, Lazik, Walter, Meissner, Ralph

“…Due to the current extent of arid regions, the pressure on available water resources is increasing. A suitable measure for water availability and dynamics in…”
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High-frequency measurements explain quantity and quality of dissolved organic carbon mobilization in a headwater catchment by Werner, Benedikt J, Musolff, Andreas, Lechtenfeld, Oliver J, de Rooij, Gerrit H, Oosterwoud, Marieke R, Fleckenstein, Jan H

“…Increasing dissolved organic carbon (DOC) concentrations and exports from headwater catchments impact the quality of downstream waters and pose challenges to…”
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Small-scale topography explains patterns and dynamics of dissolved organic carbon exports from the riparian zone of a temperate, forested catchment by Werner, Benedikt J, Lechtenfeld, Oliver J, Musolff, Andreas, de Rooij, Gerrit H, Yang, Jie, Gründling, Ralf, Werban, Ulrike, Fleckenstein, Jan H

“…Export of dissolved organic carbon (DOC) from riparian zones (RZs) is an important component of temperate catchment carbon budgets, but export mechanisms are…”
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Improving Load Estimates for NO3 and P in Surface Waters by Characterizing the Concentration Response to Rainfall Events by Rozemeijer, Joachim C, van der Velde, Ype, van Geer, Frans C, de Rooij, Gerrit H, Torfs, Paul J. J. F, Broers, Hans Peter

“…For the evaluation of action programs to reduce surface water pollution, water authorities invest heavily in water quality monitoring. However, sampling…”
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Comments on “Improving the Numerical Simulation of Soil Moisture–Based Richards Equation for Land Models with a Deep or Shallow Water Table” by de Rooij, Gerrit H.

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Averaging or adding domain conductivities to calculate the unsaturated soil hydraulic conductivity by Rooij, Gerrit H.

“…Recent models of the unsaturated hydraulic conductivity curve (UHCC) are the sum of separate UHCCs for domains of capillary water, film water, and water vapor…”
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Aquifer-scale flow equations as generalized linear reservoir models for strip and circular aquifers: Links between the Darcian and the aquifer scale: Technical Note by de Rooij, Gerrit H.

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Spatial and temporal distribution of solute leaching in heterogeneous soils: analysis and application to multisampler lysimeter data by de Rooij, Gerrit H., Stagnitti, Frank

“…Accurate assessment of the fate of salts, nutrients, and pollutants in natural, heterogeneous soils requires a proper quantification of both spatial and…”
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Aquifer-scale flow equations as generalized linear reservoir models for strip and circular aquifers: Links between the Darcian and the aquifer scale by de Rooij, Gerrit H.

“…An analytical treatment of aquifer flow is presented to establish a link between runoff models and aquifer properties. Recently developed one‐dimensional…”
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Modelling solute leaching during fingered flow by integrating and expanding various theoretical and empirical concepts by DE ROOIJ, GERRIT H., CHO, HIROYUKI

“…Wetting front instability (fingered flow) accelerates solute transport through the unsaturated zone to the groundwater table. Whether fingers widen or…”
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Efficient calculation of solute transport in heterogeneous soils exhibiting non-Richards-type unsaturated flow by Rooij, Gerrit H., Vries, Peter

“…Soil heterogeneity hampers our ability to calculate field-scale solute leaching. Many of the existing field-scale modeling attempts are laborious, time…”
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Estimating groundwater recharge for an arid karst system using a combined approach of time-lapse camera monitoring and water balance modelling: Estimating Groundwater Recharge for an Arid Karst System by Schulz, Stephan, de Rooij, Gerrit H., Michelsen, Nils, Rausch, Randolf, Siebert, Christian, Schüth, Christoph, Al-Saud, Mohammed, Merz, Ralf

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Estimating groundwater recharge for an arid karst system using a combined approach of time‐lapse camera monitoring and water balance modelling by Schulz, Stephan, de Rooij, Gerrit H., Michelsen, Nils, Rausch, Randolf, Siebert, Christian, Schüth, Christoph, Al-Saud, Mohammed, Merz, Ralf

“…Groundwater is the principal water resource in semi‐arid and arid environments. Therefore, quantitative estimates of its replenishment rate are important for…”
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Improving Load Estimates for NO 3 and P in Surface Waters by Characterizing the Concentration Response to Rainfall Events by Rozemeijer, Joachim C., van der Velde, Ype, van Geer, Frans C., de Rooij, Gerrit H., Torfs, Paul J. J. F., Broers, Hans Peter

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Averaged water potentials in soil water and groundwater, and their connection to menisci in soil pores, field-scale flow phenomena, and simple groundwater flows by de Rooij, G. H.

“…The movement of subsurface water is mostly studied at the pore scale and the Darcian scale, but the field and regional scales are of much larger societal…”
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Averaging hydraulic head, pressure head, and gravitational head in subsurface hydrology, and implications for averaged fluxes, and hydraulic conductivity by Rooij, G.H. de

“…Current theories for water flow in porous media are valid for scales much smaller than those at which problem of public interest manifest themselves. This…”
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Improving Load Estimates for NO(3) and P in Surface Waters by Characterizing the Concentration Response to Rainfall Events by Rozemeijer, Joachim C., Van der Velde, Ype, Van Geer, Frans C., De Rooij, Gerrit H., Torfs, Paul J. J. F., Broers, Hans Peter

“…For the evaluation of action programs to reduce surface water pollution, water authorities invest heavily in water quality monitoring. However, sampling…”
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Polymer tensiometers with ceramic cones: direct observations of matric pressures in drying soils by van der Ploeg, M. J., Gooren, H. P. A., Bakker, G., Hoogendam, C. W., Huiskes, C., Koopal, L. K., Kruidhof, H., de Rooij, G. H.

“…Measuring soil water potentials is crucial to characterize vadose zone processes. Conventional tensiometers only measure until approximately −0.09 MPa, and…”
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Catchment-scale non-linear groundwater-surface water interactions in densely drained lowland catchments by van der Velde, Y., de Rooij, G. H., Torfs, P. J. J. F.

“…Freely discharging lowland catchments are characterized by a strongly seasonal contracting and expanding system of discharging streams and ditches. Due to this…”
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Improving catchment discharge predictions by inferring flow route contributions from a nested-scale monitoring and model setup by van der Velde, Y., Rozemeijer, J. C., de Rooij, G. H., van Geer, F. C., Torfs, P. J. J. F., de Louw, P. G. B.

“…Identifying effective measures to reduce nutrient loads of headwaters in lowland catchments requires a thorough understanding of flow routes of water and…”
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