Low Impact Development (LID) Demystified for Designers

Daniel Roehr

Low Impact Development (LID) stormwater strategies are crucial for urban design around the world. Certainly, where rain occurs regularly and especially where sudden high peak flow rates can flood cities, intelligently applied LID can mitigate a large portion of the problem. Climate change made rain events extremely difficult to predict for climatologists and hydrological engineers and therefore we need to be prepared to deal with excessive rainwater in increasing denser impervious cities around the world. But this needs to occur already in the concept design phase to provide the space to apply LID at site scale. Many functioning LID system examples exist in Europe, North America, Australia, Asia and New Zealand to mitigate storm water but in most cases, they are still an afterthought in planning, urban and architectural design instead of guiding urban and building proposals. Indeed, stormwater management should be the first thought for planning, landscape, urban and building design. Landscape architects are equipped not only with a holistic understanding and reading of a site at various scale and its systems, they also have the knowledge of the other perimeters needed to implement LID, climate, soil, site condition and including context. For this reason, designers and permitting municipalities need user-friendly tools to “dimension” LID tools such as retention/detention areas, bio-swales, living (green) roofs at site and urban scale prior new building and urban design proposals and retrofits. This presentation will demonstrate an internationally usable and user-friendly tool called Holistic Stormwater Management Application (HSMA) currently developed by greenskins lab at the University of British Columbia.

Presented by Daniel Roehr

Assoc. Prof. Daniel Roehr MBCSLA, CSLA, AKB teaches Landscape Architecture at the University of British Columbia in the School of Architecture and Landscape Architecture. Since 2007, he runs the research group greenskins lab (www. greenskinslab.sala.ubc.ca). His current research focuses on the integration of living roofs as part of holistic systems for stormwater management. In 2013-14 he was a UBC Sustainability Research Fellow, 2016 he received the Killam Teaching Prize. Daniel co-authored the book “Living Roofs in Integrated Urban Water Systems”, (Routledge 2015) and regularly publishes in scientific journals and professional magazines. Daniel has practiced in Europe, North America & Asia. From 1995 - 2000, he was project architect of the award-winning and water sensitive Daimler-Chrysler Green Roof Project, Potsdamer Platz, Berlin, Germany. Before Vancouver, he ran his own firm in Berlin 1999 - 2007 and co-founded a firm in Shanghai 2004. He is currently developing an internationally usable Holistic Stormwater Management Application (HSMA) with his research team and writing his second book “Seeing Environment: Interacting with the Landscape - A Guide for Designers” to be published in 2020 by Routledge.