Content

Execution of a pump test at the Krauthausen test site
Analysis of data from a pump test
Calculation of capture zones around an extraction well
Calculation of air flow and mass transfer of a volatile compound towards extraction points
Calculation of the migration of a groundwater pollution plume from a source zone: sensitivity analysis to examine the effect of different processes and process parameters (sorption-desorption, dissolution rate, multicomponent degradation) on plume spreading
Calculation of the dissolution rates of a NAPL pool and of the NAPL concentrations in the groundwater
Calculation of the specific NAPL volume in a floating layer based on NAPL and soil characteristics

Course material

Spreadsheets, calculation programmes

Format: more information

Besides the practical session, a pump test will be done at the test site of Krauthausen. The test data have to be analyzed and used to simulate the transport from a virtual pollution on the site to pump wells. The results of this exercise should be summarized in a report to be discussed at the exam.

Content

Part I: Flow in soil and groundwater

- Soil water balance
- Flow to pumping wells and capture zones of pumping wells.

Part II: Advective flow in the soil air

- Flow equation for air in porous media and analogy with equations describing water flow
- Solving flow equations for air flow towards soil air extraction wells

Part III: Transport of chemical components

- Phase partitioning of chemical components in solid, fluid (water and non-aqueous liquids), and gas phases.

- Diffusive transport in soil air

- Convection-dispersion equation in water phase; 1-D, 2/3 D
- Effect of sorption-desorption and rate limited transfer processes (kinetic sorption-desorption, dissolution from stagnant water phase) on transport
- Description of degradation and multicomponent reactive processes and effect of mixing on multicomponent reactive transport

Part IV:  Behaviour of NAPLs in soil and groundwater

- Capillary pressure and saturation relationships, displacement pressure and residual NAPL content
- Migration of light NAPLs and dense NAPLs in soil: smear zones, floating layers, pools and capillary barriers.
- Interpretation of the thickness of NAPL floating layers in observation wells: definition and calculation of LNAPL specific volumes.

Course material

Cursustekst,
Chapter 2, Chapter 3, part of Chapter 5, Chapter 6 of Groundwater Science by Charles R. Fitts;
Soil and Groundwater Contamination: Non Aqueous Phase Liquids by Mayer and Hassanizadeh, Water Resources Monograph 17, American Geophysical Union, 2005.