1D and 3D NMR Imaging of Water Content Changes in the Topmost Soil Layer During Evaporation
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| Title: | Main Title: 1D and 3D NMR Imaging of Water Content Changes in the Topmost Soil Layer During Evaporation |
| Description: | 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 in ltration. 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: | Steffen Merz (Author) |
| Publisher: | CRC/TR32 Database (TR32DB) |
| Publication Year: | 2013 |
Topic
| TR32 Topic: | Soil |
| Related Subproject: | A1 |
| Subjects: | Keywords: PhD Report, NMR |
File Details
| Filename: | Report1_Merz_2012.pdf |
| Data Type: | Text - Text |
| File Size: | 2.7 MB |
| Date: | Available: 31.03.2012 |
| Mime Type: | application/pdf |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Only Project Members |
| 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 |
Geographic
Specific Information - 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 (1 - 13) |
| Further Information: | TR32 Student Report Phase II |
Metadata Details
| Metadata Creator: | Steffen Merz |
| Metadata Created: | 31.10.2013 |
| Metadata Last Updated: | 31.10.2013 |
| Subproject: | A1 |
| Funding Phase: | 2 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Page Visits: | 633 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 1 |
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