Environmental evening “Green areas in city” / Miljøkveld “Grønne byområder”

Today I gave a presentation for the Environmental evening about “Green areas in city”
Place: Stammen cafe, Trondheim, Norway


Among the presenter were Ole Reitan from ABC Natur (a presentation about the importance of having a diversity in green urban areas) and Erik Brenna from Bioveier i byen (a presentation about how to construct a wildlife friendly garden and about the work Bioveier i byen does in Trondheim).

Organizers: Naturmangfoldgruppen i Naturvernforbundet i Trondheim (from Norwegian: Nature biodiversity group in Nature Conservation Association in Trondheim) and Bioveier i byen (from Norwegian: Bio ways in city).

event on facebook: https://www.facebook.com/events/985607911574199/

12 Green roof in Oslo / Sognsveien barnehage – kindergarten

12 Green roof in Oslo / Sognsveien barnehage – kindergarten

A nice project on the roof of kindergarten, the green roof is visible from second floor of kindergarten. This roof is example of soil loss. This is why it is important to check and maintain the vegetation on the extensive … Continue reading

09 Green roof in Oslo /University of Oslo, Blindern

09 Green roof in Oslo /University of Oslo, Blindern

It is the oldest roof which I have visited in Oslo. The green roof has been installed in 2002. It has made by Reiersøl Planteskole AS, Norway. It was a real challenge to find which company installed the green roof. … Continue reading

08 Green roof in Oslo / Pilestredet Park 20

08 Green roof in Oslo / Pilestredet Park 20

This is also an extensive green roof in Pilestredet Park. The roof is different from most of roofs, because it is a lot of shade, because of the big ventilation pipes on the roof. Of course pipes limited my study … Continue reading

07 Green roof in Oslo / Stensberggata 10-14

07 Green roof in Oslo / Stensberggata 10-14

This is a third roof in Pilestredet Park. Of course they have much more, but I just choose four. I have visited four roofs in Pilestredet Park: Pilestredet Park 25 (link to post) Pilestredet Park 41 (link to post) Stensberggata … Continue reading

05 Green roof in Oslo / Pilestredet 41

05 Green roof in Oslo / Pilestredet 41

This is a next roof in Pilestredet park on Oslo and Akershus University College The green roof consists of 3 levels and I have studied all of them. The lowest level has a public area with tables. There are photos … Continue reading

Mercury in drains, Oslo

While reading a report “Development of Pilestredet Park” about rebuilding of an area in Oslo, Norway, I noticed the line on page 15: “The hospital was inspected for mercury, and a total of 7.1 kg was found in drains and water … Continue reading

What is the best way to reduce local floodings?

English: Illustration of relationship between ...

English: Illustration of relationship between impervious surfaces and surface runoff (Photo credit: Wikipedia)

Problems:  Water Pollution, floodings and big amount of money for stormwater management what we have today in places in which grey infrastructure are used.

What is the best way to reduce local floodings?

First, I want to explain, what issues we have, if we use grey infrastructure. Grey infrastructure is a system of pipes which convey water runoff from roads, pathways and roofs more often outside of the city.

According to ASLA report “Banking on Green”, the best way is return to natural processes such as usage of soils and vegetation to infiltrate, evapotranspire, and/or recycle stormwater runoff. It means creation new sustainable GREEN Infrastructure.

The ASLA offers three options and provide examples of significant results in relation to effectiveness, esthetics and cost-effectiveness. 

Three green solutions:

  • Pervious material for pavement, instead of impervious materials like asphalt and concrete
  • Creation wetlands or rain gardens or green streets (low swale, wetland biofilter, water quality garden), plants can intercept runoff
  • establish Green roofs, they accumulate a big amount of water and reduce runoff from the roof

Green Infractracture techniques is shown a positive effect in High School in Lousiana, City of Portland, Green Roofs in Washington, DC and others.

Advantages of GREEN Infrastructure:

  • is cost-effective (less expensive managing of runoff and infrastructure cost)
  • increase energy-efficiency and reduce energy costs by reducing heating and cooling demands
  • give opportunity to re-use water runoff for landscaping
  • reduce flooding, therefore reduce damages to property and capital for storm water volume control
  • reduce water pollution and improve water quality
  • reusing water more efficiently on site
  • improve air quality
  • increase habitat and green spaces 
  • enhance human health

ASLA also provide an education clip about the topic: