[552] - 1D and 3D NMR Imaging of Water Content Changes in the Topmost Soil Layer During Evaporation

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Merz, S., 2012. 1D and 3D NMR Imaging of Water Content Changes in the Topmost Soil Layer During Evaporation. PhD Report, Institute of Bio- and Geosciences (IBG-3), Research Center Jülich, Jülich, Germany. Accessed from http://www.tr32db.uni-koeln.de/data.php?dataID=552 at 2019-04-25.
Title(s):Main Title: 1D and 3D NMR Imaging of Water Content Changes in the Topmost Soil Layer During Evaporation
Description(s):Abstract: Flow and transport in unsaturated soils are key processes controlling water cycle. Here, the top surface layer is one decisive bottleneck for both evaporation and inltration. Especially the evaporation can be strongly aected by spatial and temporal variability of porosity, pore structure, topology and moisture content in the topmost soil layer. In this layer water content and hydraulic conductivity may change strongly and moisture ow changes from uid to vapour phase transport [Shokri et al. 2010]. This transition can reduce the evaporation rate and also the soil surface temperature to a considerable amount. Further process understanding is driven by coupling theoretical concepts with non-invasive visualization of uxes. Since processes proceed on small length scales, high spatial resolution is inevitable, 1D and 3D magnetic resonance imaging (MRI) will be applied for the investigation of evaporation in the upper 25mm. Final aim is the monitoring of moisture content changes in the eld and comparison with model calculations. For this purpose a 1D surface NMR sensor, NMR Mouse (mobile universal surface explorer) will be eventually used at a chosen test site of the TR32 collaborative research centre. It has a max. measurement depth of 25 mm and operates at a Larmor frequency of 13.4 MHz. To achieve this goal the investigations start with small model and natural soil cores which can also be probed by conventional 3D high-eld MRI using a 4.7T ultra-wide bore scanner.
Responsible Party
Creator(s):Author: Steffen Merz
Publisher:CRC/TR32 Database (TR32DB)
TR32 Topic:Soil
Subject(s):CRC/TR32 Keywords: PhD Report, NMR
File Details
File Name:Report1_Merz_2012.pdf
Data Type:Text
File Size:2721 kB (2.657 MB)
Date(s):Available: 2012-03-31
Mime Type:application/pdf
Download Permission:OnlyTR32
General Access and Use Conditions:According to the TR32DB data policy agreement.
Access Limitations:According to the TR32DB data policy agreement.
Licence:TR32DB Data policy agreement
North:-no map data
Measurement Region:Laboratory
Measurement Location:--Laboratory--
Specific Informations - Report
Report Date:31st of March, 2012
Report Type:PhD Report
Report City:Jülich, Germany
Report Institution:Institute of Bio- and Geosciences (IBG-3), Research Center Jülich
Number Of Pages:13
Period of Pages:1 - 13
Further Informations:TR32 Student Report Phase II
Metadata Details
Metadata Creator:Steffen Merz
Metadata Created:2013-10-31
Metadata Last Updated:2013-10-31
Funding Phase:2
Metadata Language:English
Metadata Version:V40
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