THE STORMWATER EXPERTS INGENIEURGESELLSCHAFT PROF. DR. SIEKER MBH

Water Cycle Cities in

Busan Water Forum Sept. 6th 2017 Busan, Korea

Dr. Harald Sommer Urban Flood

Münster 2014 > 280mm (Source: Westfälische Nachrichten, www.wn.de) Hamburg main station 2011 Foto: Bodo Marks, Quelle: www.wz-newsline.de Urban flooding

www.berliner-feuerwehr.de, abgerufen am 28.10.2012

Berlin, July 2016, Source: Tagesspiegel

Hoppegarten bei , 2011, Foto: Sieker Urban flooding

Inflow of storm waterinto Metro Station in Berlin on 4.8.2013 (Source: www.youtube.com) Heat Island effect

Quelle: cnx.org • Urban Heat Stress => Health Stress • Reasons for Heat Island effect: • Raised heat storage & radiation • Lower evatranspiration => lower cooling Compensation of Effects by Stormwater Infiltration

Evaporation

Stormwater infiltration Concept of Measures LID, SUDS, WSUD, BMP and Blue Green Infrastructure

Rainfall Evaporation Uptake (Usage)

Overflow runoff ?

Runoff - Uncontrolled Infiltration - Controlled Storm-Water-Management and Informationssystem for Emscher-Region Emscher-Region m k

Duisburg 5 Bochum 2 Dortmund Essen

~ 865 km² ~ 266 km² sealed area

66 km Emscher-Regeneration Emscher-Region

Duisburg BochumDortmund Essen • Before: Open Combined Sewer • Aim: natural stream • Begin: End of 1980th Duration app. 30-40 years • „Projekt 15-15“ (starting 2005): • 15% Disconnection of areas in 15 years • App. ~ 40.000.000 m² !! • Measures • Disconnection and separate sewers, Decentralised wwtp‘s, etc. • Investment: ~4.5 Bill. € Route of storm water

Fotos: M. Kaiser ZUGABE Prioritising Strategical Planning

Multi ? Criteria Analysis

Aim: Identify areas with high synergy effects! RISA Hamburg Rainwater InfraStructure Adaption

• Rainwater InfraStructure Adaption • From 2010 until 2014 • Adaption of all relevant authorities and planning levels into cities storm water management plan • Quantity and quality • SUDS and centralised measures RISA Hamburg www.risa-hamburg.de Partners Output Report and guidelines on: - Road design - Greenroofs strategy - Sewer design - Storm water management in public building - Multifunctional storage area - Improvement of rivers and lakes - Storm water treatment Concepts of Urban Waste and Storm Water Management – Project KURAS in Berlin Leader: Kompetenzzentrum Wasser Berlin (KWB) Measures of stormwater management Folie 15

Building level City quarter level

Catchment level Copenhagn (DK)

Climate Adaption Plan (2011)

- Climate neutral city - Climate adaption measures - Flexibility - Synergy with other planning - High technical level - Green growth Strategy - Cooperation and information Copenhagn (DK) Climate Adaption Plan (2011)

• Disconnection of Storm Water with SUDS • Conveying of storm water with little or no damage

• Establishing Green Infrastuctures continously • Opening Pipes to water courses • Investment: Several Mio. EUR in the next decade Amsterdam (NL) Rainproof

Solution with the people www.rainproof.nl Amsterdam (NL) Rainproof Example: Berlin- Rummelsburger Bucht Berlin

Intensive Extensive Roof greening greening on garages on roof tops

Infiltration Example: Berlin-Rummelsburg Example: Berlin-Rummelsburg Example: Berlin-Rummelsburg Solon AG, Berlin

• Planer: • Freiraum: hochC Landschaftsarchitektur, Berlin • Haustechnik: EGS Plan, Stuttgart

Usage: - Irrigation Cistern - Cleaning - Toilet flush

Roof

Green Roof Pond Example Potsdamer Platz, Berlin

Potsdamer Platz, Berlin Potsdamer Platz, Berlin

Foto: Katharina Teschner Treedrain®

Grafik: Prof. Dr. Sieker mbH • Rückhaltung des Wassers ohne und mit Versickerung • Retention of stormwater with and without infiltration Treedrain® IGA Connection of water balance to urban climate

• Soil humidity as transfer parameter effecting evapotranspiration Future: Managing and Steering Storages Lessions learned • Many solutions for storm water management • With decentralised solutions quantity and quality of problems can be solved • Managing these storages with rainfall prediction will enhance solutions • Integrated planning of all planning levels • Early integration in planning phase is needed

Infiltration Usage Transpiration

Retention Treatment Drainage Thank you for your attention !

Evaporate, Infiltrate, Use

Retain Store Discharge

Bruins, NL Ingenieurgesellschaft Prof. Sieker mbH Dahlwitz-Hoppegarten b. Berlin www.sieker.de