RainGain International Workshop in Rotterdam

24th of March 2015

The RainGain International Workshop took place on March 24th 2015 at the Inntel Hotel Rotterdam Centre in Rotterdam, located at the waterfront at the foot of the Erasmus Bridge. Sixty-two people attended, including practitioners and scientists from a number of universities, water companies, water boards, engineering consultants, local authorities, and regional and national environmental and meteorological agencies from across Europe (see delegates list).

The workshop provided an opportunity for experts to share and discuss ideas on the topic of urban pluvial flood modelling, forecasting and management; water management challenges and approaches in Jakarta (Indonesia), Rotterdam and Amsterdam were presented and discussed.

Arnoud Molenaar, the chief resilience officer of Rotterdam, welcomed attendees and gave an overview of the current management of the city of Rotterdam to make the city more resilient, particularly on the topics of integrated water management and innovative climate adaptation. Molenaar highlighted the importance of for example strong interdependencies between smart infrastructure, ICT, and potential failures. Furthermore he brought the news that Rotterdam is now introducing small scale urban water management solutions on a large scale.

Feirully Irzal, one of the guests from Jakarta, followed this up with a presentation about extreme rainfall in Jakarta. He illustrated the extreme rainfall events of January 2013 and February 2015. These rainfall events lasted about 4-5 hours, with a total amount of 361 mm. To cope with this quantity of rainfall, they need a lead time of about 8 hours for preparation activities, like evacuation of certain areas.

This was followed by a presentation by Daniel Goedbloed, who presented Rainproof Amsterdam. To introduce this topic he compared the water systems of Rotterdam and Amsterdam. These two water systems are both lowland systems with little elevation differences, but Rotterdam consists mostly of polder areas below sea level, while most areas in Amsterdam are directly connected to the “boezem” system at mean sea level, with some in-lying polder areas towards the outskirts. Goedbloed explained that in both cities smaller scale solutions are introduced to protect against flooding, and elaborated on the importance of bottom up initiatives and the involvement of city’s residents. Goedbloed also mentioned that we need to find balance between flood risk management and the added value of rainwater use for other purposes.

During the 2^nd part of the International Workshop, radar specialist Herman Russchenberg explained the added value of polarimetric X-band radars and Daniel Schertzer shared his experience with the installation of the X-band radar in Paris. In addition, the radar manufacturer of the Rotterdam radar (SSBV) presented the specifications of the X-band radar, and elaborated on the radar development process from the first step till the final installation.

AGENDA (download it here)		Feirully Irzal presenting the extreme rainfall event of February 2015 in Jakarta Alex Nickson presenting possible solutions of the break-out session
Location	Inntel Hotel Rotterdam Centre, Leuvehaven 80, 3011 EA Rotterdam: *directions*
9:00	Welcome
9:30	Opening International Workshop
9:45	Presentation 1 - Feirully Irzal - Extreme rainfall in Jakarta
10:15	Presentation 2 - Daniël Goedbloed - Amsterdam Rainproof
10:45	Break
11:15	Breakout session 1 - Coping with extreme rainfall 1
12:30	Lunch
13:30	Presentation 3 - SSBV - The Rotterdam radar
14:00	Presentation 4 - Herman Russchenberg - Added value x-band radar
14:30	Break
15:00	Breakout session 2 - Coping with extreme rainfall 2
16:00	Review, discussion and closing
17:00	Workshop finished

This event followed the 7^th RainGain Project Meeting on the 23^rd of March: click here for further information.