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Trees and Stormwater June 3rd 2010, Stockholm

City OF Stockholm, Traffic Administration Invite to a workshop on Trees and stormwater - using structural soils as a sustainable solution for local management of storm water and extending the life of urban trees. The discoveries made in recent years concerning root growth and the design of suitable tree substrates to develop a robust, load-bearing root space are being used by the Traffic Administration in the City of Stockholm to develop a concept to improve the life of urban trees. An important element in this concept is the systematic utilization of the rainwater from surfaced areas for watering of the trees in a well ventilated medium with high coarse-pore content. Where van der Nootska Palatset, St. Paulsgatan 21, Stockholm Workshop 09.00-16.30, price EURO 200, max 100 participants Guided tour 18.00-21.00. Guided trip in the evening by boat enables us to visit further places/sites in Stockholm. The tour starts at Slussen goes to Narvavägen, passes the 500 year old park Kungsträdgården with 250 new lime trees and ends in the Old Town at Kornhamnstorg. A light Swedish Midsummer dinner will be served on board. Price: EURO 50, max 30 participants

Programme 08.30 Registration and Coffee 09.00 Introduction Pia Krensler, Parks Superintendent, City of Stockholm 09.15 Construction of soil pits for optimized root development on newly planted or rehabilitated major old trees. Örjan Stål SLU Swedish University of Agricultural Sciences, Anna Hedlund, Sweco 10.00 A sustainable approach to stormwater management solutions from Portland, Oregon, USA James Allison, Watershed Revegetation Program Manager City of Portland Environmental Services 11.00 Trees as a resource in stormwater management in urban areas, examples from Paris France and other cities. Christian Piel and Thierry Maytraud 12.00 Lunch 13.00 Structural soils and stormwater. Construction and examples from different projects in Stockholm. Ways to irrigate trees and relieve the pressure on the recipients. Björn Embrén, Tree Officer City Of Stockholm 14.00 Research on root environment in structural soil. Anu Riikonen University of Helsinki 14.30 Hornsgatan planning and layout design with structural soils and stormwater solutions for a newly designed boulevard. Emma Lundborg Tyréns AB 15.00 Coffee 15.30 Visit to Hornsgatan. Ongoing construction of structural soil. Guiding in Swedish, English, German and French. 16.30 End of programme