This study examined the effect of greenery on thermal comfort in different microclimates in Sri Lanka. Temperature and humidity were measured in buildings surrounded by either greenery or low greenery in Colombo, Kandy, and Nuwara Eliya over a 10 hour period. The results showed that temperature was 1 degree Celsius lower in greenery areas compared to low greenery areas in urban Colombo. Greenery also had a greater impact on temperature in lower altitude areas than higher altitude places. In conclusion, greenery plays an important role in creating a more environmentally friendly and comfortable living environment for people.

1. SARATHKUMAR.R
Effect of greenery in
thermal comfort

2. Due to the rapid urbanization of the world, more
people leave villages and migrate to cities
The rapid growth of population and development in
cities create uncomfortable living environment to
human beings.
The main cause for this unfavourable condition is the
MODIFICATION OF NATURAL GREENERY by
urban development and the changes of the thermal
properties.

3. This study discusses the effects of temperature and relative
humidity on buildings with surrounding environment.
This was carried out in Colombo, Kandy and Nuwera-Eliya,
which belongs to three different micro climatic conditions.
Temperature and humidity measurements were taken with
the presence of two different green cover and were
compared with each other.
The temperature readings illustrated a clear difference
between greenery and low greenery environment
From the Paper
EFFECTS OF GREENERY ON CITY COMFORT IN
DIFFERENT MICRO CLIMATIC CONDITIONS
R U Halwatura,
Department of civil Engineering
University of Moratuwa

4. • More than 70 million of residencies are added to
the urban cities each year. These manmade
structures and the changes which take place cause
extensively negative effects on nature.
• This will create an artificial environment and
destroy the greenery of the earth planet.
• Unbalanced climate changes will affect the water
cycle, increase temperature and cause
uncomfortable humidity which may ultimately
create Urban Heat Island (UHI) in the planet earth

6. Leaves help turn down the
thermostat. They cool the air
through a process
called evapotranspiration.
Evapotranspiration is the
combination of two simultaneous
processes: evaporation and
transpiration, both of which
release moisture into the air.
During evaporation, water is
converted from liquid to vapor and
evaporates from soil, lakes, rivers
and even pavement.
During transpiration, water that was
drawn up through the soil by the
roots evaporates from the leaves.
It may seem like an invisible
process to our eyes, but a
large oak tree is capable of
transpiring 40,000 gallons of
water into the atmosphere
during one year

7. Sri Lanka is located in the Indian Ocean at the
latitude of 5⁰-10⁰N and longitude of 79⁰-82⁰E.
Climatic condition-tropical wet.
25 districts.
An average temperature at day is 30C.
The city of Kandy lies at an
altitude of 488.6 meters
above sea level in the center
of the island and is
surrounded by ranges of
mountains. Mean
temperature level in city
28C.
Nuwara Eliya is situated
at an elevation of about
1745 m above mean sea
level and is surrounded
by a significantly large
green environment and
mountains. Mean
temperature level in the
city is 15C

8. OBJECTIVES AND THE METHODOLOGY
The main aim of this research is to identify the
change of temperature and humidity inside the
dwellings according to the surrounded
environments.
Measure the temperature and humidity changes
within a 08.00hrs to 18.00hrs time period in 15
minutes intervals in three cities in Srilanka,
Colombo, Kandy and Nuwara Eliya.
1.Find the temperature and humidity
changes in greenery environment building
in each city.
2.Find the temperature and humidity
changes in low greenery environment

9. DATA ANALYSIS AND FINDINGS

12. Temperature and
humidity variation
in Colombo in
greenery and low
greenery
environment

14. Temperature and
humidity variation
in Kandy in
greenery and low
greenery
environment

16. Temperature
and humidity
variation in
Nuwara Eliya in
greenery and
low greenery
environment

22. • The humidity level of each city is within the
comfortable limits. Temperature decreases by 1oC in
greenery area than the low greenery area in the urban
city, Colombo.
• Moreover it was noted that the effect of greenery is
much higher in low altitude areas than in the up
country.
• Greenery plays an important role in building an
environmentally friendly society.
• it brings many benefits to the environment and the
people who have busy days.
• It is believed that urban cities in the world like
Colombo in Sri Lanka can benefit from green
surfaces, especially when both walls and roofs are
covered with vegetation.

24. Even though we
having various of trees
why our CEG campus
is not so comfort?

26. Relative humidity % Sep 14 2016 - Sep
28 2016