Wednesday, Oct. 23rd 2:00 - 3:30 PM
by Keith MacPherson
Seminar Price: $60
CEUs: APLD, IA, ISA, NALP, PGMS, QWEL
Room: TBD
There are two issues in cities that MacPherson will address: urban heat island effect and infrastructure. This course will explore the need to design for heat mitigation in cities and find ways of bringing the temperature down within our heavily populated urban centres.
The session includes identifying the hot spots in cities using drones, at street and allotment levels; positioning trees in those areas to mitigate the heat island effect and deciding the desired target canopy area. It is important to start setting dates and tracking the progress. MacPherson will introduce important guidelines when it comes to identifying canopy diameters in trees for desired shade cover and proper loam soil calculations.
The second thing that MacPherson will discuss is WSUD or LID - water sensitive urban design, or low impact design. There are three main areas for integration of tree pits in water sensitive urban design:
1. Passive irrigation which is simply bringing water to a tree from hard pavement for the health of the tree. He will demonstrate some tools that they've developed to model this.
2. Pollution removal. This is about the science behind the removal of pollutants out of stormwater and using software modelling to measure it.
3. Flood mitigation, or management of flows is the third area. Trees can be used for onsite retention to hold back water for the benefit of the trees root system to suck up and pump out for evapotranspiration and cooling over time. Incorporating capillary rise, and saturated zones for drought resilience, etc.
Last of all, MacPherson will run through some photographs of the soils under pavement trial with Bartlett Tree Experts at their Arboretum in Charlotte, North Carolina. Six different tree planting methods were trialled - and the firm was invited to participate in this project. Some close-up photographs of the various systems and patterns of root growth in different types of growth media beneath pavement will be shown.
PROFILE:
Keith is the Client Relations Manager of Citygreen USA- the world's leading supplier of sustainable landscape solutions, including structural soil cells, tree root management systems, water and aeration products.
From a young man, Keith always had an interest in the landscaping and construction industry. His experience range from Landscaping, Project Management, Advertising, to current Job at Citygreen, which he feels is the best job he's had.
Keith joined Citygreen in January 2019 when a friend told him of the opportunity, and he latched on immediately. His goal is to increase the green building space with highly engineered urban landscape systems, as well as enabling trees to reach their full potential. Keith adopted the company passion for 100% recycled products that would integrate seamlessly with infrastructure and services.
From humble beginnings, Citygreen has grown to become the Global leader in urban landscape solutions, with offices in Sydney and Los Angeles. Citygreen's innovative systems have been used on hundreds of successful projects across Australia, New Zealand, Canada, USA, Europe, UK, UAE, and Asia. Citygreen structural vault systems are made from 100% recycled materials- and have been since day one.
