Research in the HOAL / Microbiology
14 Februar 2020

New "Modified H-Flumes"

Around the start of this year the disicion was made to install new measuring weirs. These...


21 November 2019

Shallow core drilling to confirm the occurence of biogeochemical hotspots delineated with geophysical imaging

On 14th of November, two boreholes with depths of 8 and 6 m respectively, were drilled at...


06 June 2019

Visit of "Vienna Doctoral Programme" students

On the 5th of June, a group of students of the Vienna Doctoral Programme on Water Resource...


17 April 2019

Maintenance at the weather station

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


15 April 2019

Professor Thomas Dunne visiting the HOAL

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


Science Questions – How can Faecal Pollution be Monitored in Real Time?

Microbial water safety management can be enhanced by real time detection of faecal pollution from enzymatic activity. Such measurements will also shed light on microbial transport processes at the catchment scale.

The HOAL is an ideal test bed for such automated measuring devices due to its highly dynamic runoff, sediment concentrations and bacterial contamination from manure.

Four enzymatic analysers with two different designs have been set up at the catchment outlet. The devices sample stream water at intervals of 1 or 3 hours. The results for different setups are compared with laboratory analyses in order to optimise the strengths of the instruments in a real time mode.

Interpretation of the faecal indicators in the context of physical and chemical parameters for events with contrasting characteristics (e.g. fast and short response times, dry and wet antecedent soil moisture) sheds light on microbial pollution processes. Manure events and the fate of faecal pollution can be identified from the time dynamics of the indicator.