Research in the HOAL / Evaporation
17 April 2019

Maintenance at the weather station

On 17th of April there was a big maintenance at the HOAL weather station with repairing and...

15 April 2019

Professor Thomas Dunne visiting the HOAL

Professor Thomas Dunne is an expert of fluvial geomorphology and hydrology, working at the...

08 November 2018

Geophysical mapping

In October Geophysics students from TU Wien were operating electromagnetic induction (EMI)...

08 October 2018

Installing new Piezometer stations

For getting information about groundwater new piezometer stations are built. In this case the...

Science Questions – What are the Atmospheric and Land Use Controls on Spatial Evaporation Patterns?

Evaporation may vary significantly over short distances and it is interesting to understanding its controls at various space-time scales.

Three eddy correlation stations were set up in the HOAL. One set of instruments has been set up at the weather station location. Additionally, two mobile stations are deployed based on a site rotation plan to optimise the locations for each sensor relating to the factors of interest; topography, soil type and moisture and vegetation. Scintillometer measurements of aggregated fluxes over a line of about 150 m are made for comparison to obtain momentum flux, sensible heat flux and information on the turbulent parameters of the air.

The data are compared with numerical simulations of the atmospheric processes to ascertain that the controls identified are generalisable to other land surface conditions.

Field campaigns dedicated to measuring transpiration and bare soil evaporation separately in a field of maize shed light on the role of vegetation in total catchment evaporation.