Abstract
In many urban runoff systems infiltrating water contributes with a substantial part of the total
inflow and therefore most urban runoff modelling packages include hydrological models for
simulating the infiltrating inflow. This paper presents a method for deterministic updating of
the hydrological model states governing the infiltrating inflow based on downstream flow
measurements. The fact that the infiltration processes follows a relative large time scale is
used to estimate the part of the model residuals, at a gauged downstream location, that can be
attributed to infiltration processes. This information is then used to update the states of the
hydrological model. The method is demonstrated on the 20 km2 Danish urban catchment of
Ballerup, which has substantial amount of infiltration inflow after succeeding rain events, for
a very rainy period of 17 days in August 2010. The results show big improvements for regular
simulations as well as up to 10 hour forecasts. The updating method reduces the impact of
non-representative precipitation estimates as well as model structural errors and leads to better
overall modelling results.
Original language | English |
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Title of host publication | Proceedings of the 12th International Conference on Urban Drainage |
Number of pages | 8 |
Publication date | 2011 |
Publication status | Published - 2011 |
Event | 12th International Conference on Urban Drainage - Porto Alegre, Brazil Duration: 11 Sept 2011 → 16 Sept 2011 Conference number: 12 http://www.acquacon.com.br/icud2011/en/ |
Conference
Conference | 12th International Conference on Urban Drainage |
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Number | 12 |
Country/Territory | Brazil |
City | Porto Alegre |
Period | 11/09/2011 → 16/09/2011 |
Internet address |