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Comparison of different soil water extraction systems for the prognoses of solute transport at the field scale using numerical simulations, field and lysimeter experiments

Abstract

To date, the understanding of processes, factors, and interactions that influence the amount of extracted water and the solute composition sampled with suction cups is limited. But this information is required for process description of solute transport in natural soils. Improved system understanding can lead to a low cost and easy to install water sampling system which can help to predict solute transport in natural soils for the benefit of environmental protection. The main objectives of this work were to perform numerical simulations with different boundary conditions and to implement the findings in the interpretation of the lysimeter and field experiments. In a first part of this thesis, theoretical considerations on the processes affecting the spatial influence of a suction cup in soil and changes in solute transport initiated by the suction cups are presented, including testing and validation of available model and experimental approaches. In the second part, a detailed experimental study was conducted to obtain data for the comparison of the different soil water sampling systems. Finally, the numerical experiments of the suction cup influence were used for the interpretation of the experimental data. The main goals are summarized as follows: - Characterization of the suction cup activity  More>>
Authors:
Publication Date:
Jul 01, 2005
Product Type:
Thesis/Dissertation
Report Number:
ETDE-DE-1533
Reference Number:
RN06000036; TVI: 0523
Resource Relation:
Other Information: TH: Diss.; Related Information: Schriften des Forschungszentrums Juelich. Reihe Umwelt/Environmentv. 55
Subject:
54 ENVIRONMENTAL SCIENCES; SOILS; LEACHATES; POLLUTANTS; ENVIRONMENTAL TRANSPORT; FIELD TESTS; LYSIMETERS; MATHEMATICAL MODELS; VALIDATION; NUMERICAL SOLUTION; SAMPLING; FINITE ELEMENT METHOD
OSTI ID:
20670636
Research Organizations:
Forschungszentrum Juelich GmbH (Germany). Inst. fuer Chemie und Dynamik der Geosphaere 4: Agrosphaere; Bonn Univ. (Germany)
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Other: ISBN 3-89336-402-1; ISSN 1433-5530; TRN: DE05GF626
Availability:
Commercial reproduction prohibited; OSTI as DE20670636
Submitting Site:
DE
Size:
183 pages
Announcement Date:
Dec 29, 2005

Citation Formats

Weihermueller, L. Comparison of different soil water extraction systems for the prognoses of solute transport at the field scale using numerical simulations, field and lysimeter experiments. Germany: N. p., 2005. Web.
Weihermueller, L. Comparison of different soil water extraction systems for the prognoses of solute transport at the field scale using numerical simulations, field and lysimeter experiments. Germany.
Weihermueller, L. 2005. "Comparison of different soil water extraction systems for the prognoses of solute transport at the field scale using numerical simulations, field and lysimeter experiments." Germany.
@misc{etde_20670636,
title = {Comparison of different soil water extraction systems for the prognoses of solute transport at the field scale using numerical simulations, field and lysimeter experiments}
author = {Weihermueller, L}
abstractNote = {To date, the understanding of processes, factors, and interactions that influence the amount of extracted water and the solute composition sampled with suction cups is limited. But this information is required for process description of solute transport in natural soils. Improved system understanding can lead to a low cost and easy to install water sampling system which can help to predict solute transport in natural soils for the benefit of environmental protection. The main objectives of this work were to perform numerical simulations with different boundary conditions and to implement the findings in the interpretation of the lysimeter and field experiments. In a first part of this thesis, theoretical considerations on the processes affecting the spatial influence of a suction cup in soil and changes in solute transport initiated by the suction cups are presented, including testing and validation of available model and experimental approaches. In the second part, a detailed experimental study was conducted to obtain data for the comparison of the different soil water sampling systems. Finally, the numerical experiments of the suction cup influence were used for the interpretation of the experimental data. The main goals are summarized as follows: - Characterization of the suction cup activity domain (SCAD), suction cup extraction domain (SCED) and suction cup sampling area (SCSA) of active suction cups (definitions are given in Chapter 6). - Determination of the boundary conditions and soil properties [e.g. infiltration, applied suction, duration of water extraction, soil hydraulic properties and soil heterogeneity] affecting the activity domain, extraction domain and sampling area of a suction cup. - Identification of processes that change the travel time and travel time variance of solutes extracted by suction cups. - Validation of the numerically derived data with analytical and experimental data from literature. - Comparison of the experimental data obtained from the various soil water extraction devices and application of the results from numerical simulations. (orig.)}
place = {Germany}
year = {2005}
month = {Jul}
}