Subproject Geo

Phase II: Integrated geophysical description of the waterdynamics in urban soils

Prof. Dr. Ugur Yaramanci, Dr. Martin Müller

Main aim of the geophysical project is to develop a conception of noninvasive geophysical methods to determine the water distribution, water dynamics and other important structural parameters on small scales. We are particularly interested in the dynamics of the water content and of important structural parameter which will be measured, inverted and interpreted jointly in terms of soil science parameter.

In addition to standard methods, like geoelectrics, spectral induced polarisation (SIP), ground penetrating radar (GPR) and surface nuclear magnetic resonance (SNMR) will be used. For all methods the necessary adaptions are performed to meet the required resolution and precision under the heterogenous and highly dynamic conditions in soils. To support SNMR, NMR laboratory experiments will be performed. Second, geoelectrics and GPR inversion will be improved and new methods will be tested to include time domain reflectometry (TDR) results.

It is neccessary to analyse the basic principles which link NMR parameters with complex electric resistivity, permittivity and pore parameters. The aim is to derive the structural properties from the field data and to specify these for the different (heterogenous) sites of the project.

fig.1: Setup for multielectrode dc-geoelectrics, Tiergarten Park Area, Berlin

fig.2: Ground Penetrating Radar (GPR) at the site Buch

Staff:

Dr. Martin Müller
Oliver Mohnke
Jürgen Schmalholz
Christoph Müller