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Bücher Englische Bücher Sachbücher Natur & Technik Non-invasive monitoring of water and solute fluxes in a cropped soil
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Non-invasive monitoring of water and solute fluxes in a cropped soil
Sarah Garré (Broschiert, Englisch)
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Beschreibung
Although the influence of root water uptake on solute transport is commonly recognized
as important, it has barely been studied throughout the literature. However, plants take
up a big amount of the infiltrating water and therefore they influence water flow patterns
in the soil and concurrently solute transport processes. For this reason, experiments
are required to investigate the relationship… between plant root water uptake and flow
field variability. Within this PhD project, we tried to elucidate the role of root water
uptake on soil moisture distribution and solute transport in two undisturbed soil
columns. During three consecutive experimental phases, the soil hydraulic and solute
transport characteristics were investigated and the influence of growing barley on water
content and tracer movement were studied. Soil water concentration and moisture
content in the lysimeters were monitored non-invasively using 3-D electrical resistivity
tomography (ERT). Next to that, time domain reflectometry (TDR) probes, tensiometers
and temperature probes were installed to measure local soil water contents, matrix
potentials and electrical conductivities. Also the outflow volume and the electrical
conductivity of the effluent were registered.
ERT is a valuable technique to monitor processes in the unsaturated zone. It is suitable
to quantify solute concentration or soil moisture content at the decimeter scale in
different soils and under varying conditions. In combination with TDR and effluent
measurements, different aspects of the solute transport process and manifestations of
preferential flow can be investigated. Steady-state step tracer experiments are very
suitable for this purpose, since the water content is kept constant during tracer
movement. Soil moisture measurements with ERT were conducted as well, but an
horizon-specific in-situ calibration of the ERT-measurements for water content was a
prerequisite for success. Dieses Produkt haben wir gerade leider nicht auf Lager.
Handgeprüfte Gebrauchtware
Bis zu 50 % günstiger als neu
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Technische Daten
Erscheinungsdatum
01.01.2011
Sprache
Englisch
EAN
9783893366811
Herausgeber
Forschungszentrum Jülich
Serien- oder Bandtitel
Schriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment
Sonderedition
Nein
Autor
Sarah Garré
Seitenanzahl
133
Einbandart
Broschiert
Bandzählung
92
Schlagwörter
Water, Cropped soil, Soil
Thema-Inhalt
R - Geowissenschaften, Geographie, Umwelt, Planung
Höhe
240 mm
Breite
17 cm
-.-
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