Fredag den 20. december 2013 afholdes seminar i urban hydrologi med særlig vægt på nedbørsestimering og vejrradar teknologi.

Alle med interesse inden for området er velkommen til at deltage. Af hensyn til receptionen bedes du indikere din deltagelse senest d. 18. december via mail til This email address is being protected from spambots. You need JavaScript enabled to view it.This email address is being protected from spambots. You need JavaScript enabled to view it.">

Sted: Lokale F-108, Aalborg Universitet Sohngaardsholmsvej 57, Aalborg

Dagens program:

Combining C- and X-band Weather Radars for Improving Precipitation Estimates over Urban Areas

PhD lecture and defence by Jesper Ellerbæk Nielsen
Department of Civil Engineering, Aalborg University, Aalborg, Denmark
December 20th 2013, at13.00, room F-108

Spatial and temporal distributed weather radar measurements of precipitation facilitate numerous applications within urban drainage, which cannot be achieved by traditional point measurements from rain gauges. Knowledge of how the precipitation is distributed between the rain gauges is highly valuable for retrospective analysis of the urban drainage system. Moreover, the knowledge of how the precipitation propagates temporally and spatially in real-time is a valuable necessity for intelligent real time control of sewer and wastewater systems.

Denmark has a unique weather radar coverage. Five meteoro¬logical C- band radars with long range cover the whole country and in addition, most larger cities are covered with high resolution X-band LAWR radars. The C-band radars serves mainly meteorological purposes, whereas the LAWR radars are dedicated urban drainage applications.

Preferring one radar network over the other for will result in a trade off between the strengths and weaknesses of the two systems. The perfect weather radar for urban hydrology is a radar with long range and high resolution in both time and space. In addition, it is also a radar which is located close to the catchment of interest, with optimal view for the rainfall measurement. An oblivious solution is to use the two radar types together, combining the individual strengths. If it is possible to extend the range of the LAWR system by mean of the meteorological C-band radar and at the same time utilise the higher resolution of the LAWR system over the catch¬ment. This will result in a radar based precipitation product with the optimal value in urban hydrology.

Motivated by this potential, the objective of the PhD project was to improve precipitation measurement for urban drainage applications by combining weather radar measurements from meteorological C-band radars and LAWRs. The focus of the research was to investigate the differences and similarities between the two radar systems, in order to gain knowledge about how they are individually functioning and to analyse both the potentials and the challenges of combining the two radar systems.

The PhD study is part of the Storm and Wastewater Informatics project (SWI) partly financed by the Danish Agency for Science, Technology, and Innovation. www.swi.env.dtu.dk

Assessment committee:
Professor Jes Vollertsen (Chairman), Department of Civil Engineering, Aalborg University, Denmark
Director Thomas Einfalt, Hydro & Meteo GmbH & Co. KG, Lübeck, Germany
Professor Patrick Willems, Hydraulics Laboratory, Katholieke Universiteit Leuven, Belgium

Moderator:
Associate Professor Thomas Ruby Bentzen, Department of Civil Engineering, Aalborg University, Denmark

PhD supervisor:
Associate Professor Michael R. Rasmussen, Department of Civil Engineering, Aalborg University, Denmark

Reception in the room C-119 after the public defence at 16:00