Research in the HOAL / Floods
21 July 2021

Heavy rainfall event

Heavy rains crossed the HOAL catchment area last week. In 24 hours, 160 mm of...


11 January 2021

Sap flow measurements on trees

For measuring transpiration on trees, so called "Sap Flow sensors" were installed. In sum six...


09 September 2020

Modification work at the catchment outlet - MW

As the catchment outlet (MW) is one of our most important measurment points, a new radar sensor is now...


28 August 2020

Maintenance works and eddy covariance calibration

In august Borbala Szeles,  Patrick Hogan and Lovrenc Pavlin were on site, supported by...


22 June 2020

Heavy rainfall event - flooding video

As predicted last weekend heavy rain fall occured in eastern Austria. Also the HOAL was affected by high...


Science Questions – How are Floods Generated?

Understanding runoff generation mechanisms is very important for better estimating floods that may occur in small catchments, in particular if one is interested in extrapolating from small to large floods and to changed environmental conditions. Researchers in the HOAL are investigating flood generation aided by the diversity of runoff generation processes such as surface runoff, springs, tile drains and wetlands.

Saturation patterns within the catchment are monitored using video cameras to understand the space-time patterns and connectivity of surface flow. This is complementary to the soil moisture network by providing better spatial resolution.

The images allow the assessment of the role of surface ponding, micro-topography and the spatial organisation of surface flow within the catchment. They are used for validating theories of flow connectivity and distributed hydrological models, and assist in understanding water quality and sediment transport processes in the HOAL.