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Spatial uncertainty assessment in modelling reference evapotranspiration at regional scale
evapotranspiration regional scale
2010/12/22
Evapotranspiration is one of the major components of the water balance and has been identified as a key factor in hydrological modelling. For this reason, several methods have been developed to calcul...
Large-scale instability of a generalized turbulent Kolmogorov flow
Large-scale instability generalized turbulent Kolmogorov flow
2009/10/30
We present an analytical study of the large scale instability of a generalized turbulent Kolmogorov flow, i.e. a periodic shear flow where the molecular viscosity has been substituted by an eddy visco...
Correlation Structure and Time Scale of Simple Hydrologic Systems
Correlation Structure Time Scale Simple Hydrologic Systems
2009/10/29
Correlation structure of river runoff is a complicated set of different persistence
phenomena in the watershed itself and in the meteorological input to the watershed.
Correlation functions and time...
The Effect of Heterogeneity on Large Scale Solute Transport in the Unsaturated Zone
Effect of Heterogeneity Large Scale Solute Transport Unsaturated Zone
2009/10/27
The effect of natural heterogeneity on large scale solute transport in the unsaturated
zone is investigated using stochastic methods. Several of the physical
parameters that control flow and solute ...
Spatial Variability of Physical Parameters and Processes in Two Field Soils Part II:Water Flow at Field Scale
Spatial Variability Physical Parameters Two Field Soils Field Scale
2009/10/26
The horizontal variability of soil hydraulic parameters, water content and suction
mcasurcd within two research ficlds in Denmark is analyzed and discussed.
A numerical analysis of the flow in the t...
Spatial Variability of Physical Parameters and Processes in Two Field Soils Part I:Water Flow and Solute Transport at Local Scale
Spatial Variability Physical Parameters Two Field Soils Local Scale
2009/10/26
Natural field systems exhibit a large degree of soil heterogeneity which affects
the movement of water and solutes and thus leads to highly varying observations
of water contcnt and solute concentra...
Spatial Variability of Physical Parameters and Processes in Two Field Soils Part Ill:Solute Transport at Field Scale
Spatial Variability Physical Parameters Two Field Soils Field Scale
2009/10/26
A numerical analysis of solute transport in two spatially heterogeneous fields is
carried out assuming that the fields are composed of ensembles of one-dimensional
non-interacting soil columns, each...
Large Scale Basins With Small to Negligible Slopes Part 2:Hydrological Modelling
Large Scale Basins Negligible Slopes Hydrological Modelling
2009/10/23
Large basins with small to negligible slopes are seldom considered in the hydrological
literature. An example of such basins is the Rio Negro catchment in
Uruguay. The first of this two-paper series...
Large Scale Basins With Small to Negligible Slopes Part I :Generation of Runoff
Large Scale Basins Negligible Slopes Generation of Runoff
2009/10/23
In the first of this two-paper series, the main mechanisms for generation of
runoff from rainfall in large basins with small to negligible slopes are analyzed
using available data from the Rio Negro...
Comparison of three stream tube models predicting field-scale solute transport
convective lognormat transfer stochastic stream tube solute transport
2009/6/8
In this paper the relation between local- and field-scale solute transport parameters in an unsaturated soil profile is investigated. At two experimental sites, local-scale steady-state solute transp...
Field scale variability of solute transport parameters and related soil properties
convective-dispersive equation mobility index breakthrough curves
2009/6/8
The spatial variability of transport parameters has to be taken into account for a reliable assessment of solute behaviour in natural field soils. Two field sites were studied by collecting 24 and 36 ...
Determination of evaporation from a catchment water balance at a monthly time scale
evaporation monthly time scale catchment water
2009/6/8
A method is presented to determine total evaporation from the earth's surface at a spatial scale that is adequate for linkage with climate models. The method is based on the water balance of catchment...
Characterization of spatial heterogeneity of groundwater-stream water interactions using multiple depth streambed temperature measurements at the reach scale
water fluxes heat conduction-advection streambed temperature
2009/5/15
Streambed temperatures can be easily, accurately and inexpensively measured at many locations. To characterize patterns of groundwater-stream water interaction with a high spatial resolution, we measu...
Pattern dynamics, pattern hierarchies, and forecasting in complex multi-scale earth systems
multi-scale earth systems dynamical variables
2009/5/15
Catastrophic disasters afflicting human society are often triggered by tsunamis, earthquakes, widespread flooding, and weather and climate events. As human populations increasingly move into geographi...