15.06.22 The Stockholm System Bjorn Embren
15.06.22 The Stockholm System Bjorn Embren
15.06.22 The Stockholm System Bjorn Embren
Björn Embrén
Tree Officer
Concrete tile
Sand
Asphalt
House
Road
Pipes
cabels
and wires
Sealing of
plastic material
collected
near the
facade
connected plant beds along the block for the best conditions for the trees
Downpipes
Facade
Tree
Concrete slabs
Concave concrete slabs
Curbstone
Compacting befor soil is washed in to the voids The stone shall fall into the box to get a stabel construction
Flushing the soil into the structure Ventilation chamber and inlet of surface water
If the percolation layer is full, the storm water flows into the old street inlet.
2004-2012
Erik Dahlbergsallén
Kocksgatan
Prunus
’Umineko’
Odengatan first growing season
Swedenborgsgatan
trees before and after structural soil
Planted in
autumn 2003
Planted 10 years at the
around location
1935 about
80 year old
Hamngatan
2005-2010
Hamngatan 60cm structural soil
Quercus
palustris
3 growing
seasons
trees without 1965-2010 trees with structural soil 2005-2010
structural soil
2010
Tegelbacken
before and after the trees have
got structural soil
2012
left 2002 right 2013 Kungsbroplan tree before and after structural soil
Reduce the risk of flooding Reduce the presence of particles and carbon
dioxide in the air
Retains water
and nutrients
Biochar
Charcoal is incredibly
stable if we dig it down
into the ground, it stays
there for thousands of
years as a Co2 sinker
By using biochar and a crushed mineral content such as rock or recycled concrete
for municipal plant beds, growth is stimulated, finite resourses for soil production
are spared (peat, sand and clay), and the possibilities of local stormwater
infiltration increases. Thus promoting crucial urban ground water production,
filtering of pollutants and less risk of contaminated recipients from flooded
stormwater and sewage systems. The increase of green biomass in the cities also
provide a whole array of other auxiliary benefits such as better air quality,
increased bio-diversity and lowered temperatures.
Biochar is a name for charcoal when it is used for particular purposes,
especially as a soil amendment. Like all charcoal, biochar is created by
pyrolysis of biomass. Biochar is under investigation as an approach to
carbon sequestration to produce negative carbon dioxide emissions.[1]
Biochar thus has the potential to help mitigate climate change, via
carbon sequestration.[2] Independently, biochar can increase soil fertility,
raise agricultural productivity and reduce pressure on forests, though the
degree to which results offer long term carbon sequestration in practice
has been challenged.[3] Biochar is a stable solid, rich in carbon and can
endure in soil for thousands of years.[1]
Wikipedia
•The first time we use charcoal
filters in structural soil was 2013
at Swedenborgsgatan.
One block with coals under airy
base course and in one block
belowe the structural soil.
Plant bed for street trees charcoal and macadam = crushed granite 32-63 mm mixed with 10% nutrient-
enriched charcoal, granite can be replaced with recycled concrete with reinforcement (iron)
2013
Magnolia planted in biochar and
stone chips = crushed granite (2-
5mm) and nutrient-enriched (chicken
manure)biochar 50/50. volume
distrustful English tree nursery man
flowering after the first growing season planted in 50/50 biochar crushed granite
Materials we test to use when we plant Biochar and stone chips = crushed granite (2-
trees shrubs and perennials 5mm) and nutrient-enriched charcoal 50/50.
volume
Biochar and stone chips = crushed granite (32- Biochar and soil =
63 mm) and nutrient-enriched charcoal 10/1. soil + nutrient-enriched charcoal 50/50.
volume volume
Drawing showing how we
build plant bed for trees in
the green area along streets
and roads to maximize
infiltration of storm water
through a charcoal filter in
the bottom of the plant bed
where we catch up nutrients
and pollutants.
we
Thegot permission
Capital of Scandinavia to start investigating the possibility
of producing biochar
Park and garden
Today, poorly
used resource
waste
Tomorrow, turned
into biochar and
renewable energy
Stockholm Biochar
Project
biochar unit
connected to
district
heating
Exampels on species planted in mixtures of biochar and
granit
For more info
Mattias Gustafsson
mattias.gustafsson@extern.stockholmvatten.se
WWW.google.se http://www.youtube.com/watch?v=UFXlsKOVmV8