Comparing the spatio-temporal variations of soil water content and soil free water content at the hillslope scale

Abstract. The Rollesbroich headwater catchment located in Western Germany is a densely instrumented hydrological observatory and part of the TERENO (Terrestrial Environmental Observatories) initiative. The measurements acquired in this observatory present a comprehensive dataset that contains key hydrological fluxes in addition to important hydrological states and properties. Meteorological data (i.e. precipitation, air temperature, air humidity, radiation components, and wind speed) are continuously recorded and actual evapotranspiration is measured using the eddy covariance technique. Runoff is measured at the catchment outlet with a gauging station. In addition, spatio-temporal variations in soil water content and temperature are measured at high resolution with a wireless sensor network (SoilNet). Soil physical properties were determined using standard laboratory procedures from samples taken at a large number of locations in the catchment. This comprehensive data set can be used to validate remote sensing retrievals and hydrological models; to improve the understanding of spatial temporal dynamics of soil water content; to optimize data assimilation and inverse techniques for hydrological models; and to develop upscaling and downscaling procedures of soil water content information. The complete data set is freely available online (http://www.tereno.net).

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Spatio-Temporal Kriging of Soil Water Content

Geostatistics Wollongong’ 96 - Quantitative Geology and Geostatistics ◽

10.1007/978-94-011-5726-1_33 ◽

1997 ◽

pp. 1020-1030 ◽

Cited By ~ 14

Author(s):

G. B. M. Heuvelink ◽

P. Musters ◽

E. J. Pebesma

Keyword(s):

Water Content ◽

Soil Water ◽

Soil Water Content ◽

Spatio Temporal

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Solution concentrations of nutrient ions below the rooting zone of a sugar maple stand: relations to soil moisture, temperature, and season

Canadian Journal of Forest Research ◽

10.1139/x93-082 ◽

1993 ◽

Vol 23 (4) ◽

pp. 617-624 ◽

Cited By ~ 5

Author(s):

Xiwei Yin ◽

Neil W. Foster ◽

Paul A. Arp

Keyword(s):

Water Content ◽

Soil Water ◽

Soil Water Content ◽

Soil Solution ◽

Sugar Maple ◽

Temporal Variations ◽

Solution Chemistry ◽

Rooting Zone ◽

Temperature Solution ◽

Turkey Lakes Watershed

Temporal variations of ion concentrations in soil solution were analyzed in relation to soil percolate volume, soil water content, soil temperature, solution chemistry, and season. The study site was an uneven-aged, mature northern tolerant hardwoods dominated by sugar maple (Acersaccharum Marsh.) within the Turkey Lakes Watershed, Ontario. Six ions were investigated: nitrate (NO3−), sulfate (SO42−), calcium (Ca2+), magnesium (Mg2+), potassium (K+), and ammonium (NH4+). Nitrate concentrations in the soil solution depended on season during the nonfoliage period and responded directly to forest floor percolation, soil water content, and season during the foliage period. Variations of SO42−, Ca2+, and Mg2+ concentrations were mostly attributable to NO3− concentration, and to season to a lesser extent. Concentrations of K+ and NH4+ correlated only weakly to any of the "independent" variables included in the analysis, reflecting a high affinity between these ions and the soil colloids.

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