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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Integral water management model for urban areas during extreme rainfall eventscase study: purmerend,...
Integral water management model for urban areas during extreme rainfall eventscase study: purmerend, the netherlands
Author : M. Siemerink1* and E. Aparicio Medrano1
Society is facing serious threats due to climate change. Climate change affects urban areas by
increased air temperatures (Heat Urban Island Effect) and possibly by increasing the chances of
heavy rainfall. In the case of extreme rainfalls, flooding assessment tools are important for
decision makers. Moreover, accurate modeling tools could directly contribute to the resilience of
cities and its existing infrastructure. In the present article we describe a methodology which
combines 1 and 2 dimensional modeling. The surface runoff is considered in the 2 dimensional
component. Here, we apply a newly developed numerical method (Stelling, 2012) for detailed 2
dimensional flooding simulations. The sewer system and surface channels are considered in the
1 dimensional component. Both components are interactively coupled. Another specific feature
of the presented methodology is the innovative method for handling the inflow of rainfall into
the sewer. In contrast to standard methods of lateral inflow on the 1 dimensional component for
the distribution of rainfall our methodology applies spatially distributed rainfall on the 2
dimensional component. We apply this methodology to construct a model for the city of
Purmerend, the Netherlands. The model results are satisfactorily compared with existing
measurements. Next, the model is applied to analyze the effects of extreme rainfall scenarios,
e.g. a rainfall of 100 mm hr-1 of intensity. The results of the presented model are used to
highlight the focusing areas and structures to guarantee the resilience of Purmerend against
extreme rainfall.
File Size : 824,439 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 20/08/2015
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