Prediction Team 3
Conclusion
The best future city plan to mitigate the Urban Heat Island effect is to place the urban area at the center of the city surrounded by evergreen broadleaf forest.
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0-39
Evergreen Broadleaf Forest
40-59
Urban
60-99
Evergreen Broadleaf Forest
Research 1
Mixed Forest vs. Water Bodies
Both U-wind and W-wind have large values in the water bodies case, but the relative humidity is relatively higher and the air layer with high temperature is thicker than in the mixed forest case. Therefore, the mixed forest is more suitable for mitigating the urban heat island phenomenon.
Research 2-1
Urban at Center vs. Forest at Center
When the urban is located in the middle of the city, the area of high temperature is thinner and gets relieved more quickly with less relative humidity. Although the wind blows stronger and earlier in the opposite case, it can be said that the urban heat island effect is mitigated well when the urban is surrounded by the forest since the air circulates by the wind from two forest areas on both sides, while it does from only one forest area in the other.
Research 2-2
Size of Urban: 20 vs. 60
In the case of large forests, the area exceeding 30 °C gets relieved more quickly because the whole air in the urban can circulate in a short period of time. Lower relative humidity and long-lasting wind blowing indicate good air circulation leading to less urban heat island effect. Therefore, creating a larger area of forest surrounding the urban is more suitable for mitigating the urban heat island effect.
Research 3-1
Urban at Center vs. Water at Center
The heat island effect is mitigated when the urban area is in the middle. The cool winds blowing from the water bodies make the urban area cool. Also, it has lower humidity when the urban is surrounded by water bodies. It is derived that the case that the urban area is located in the middle is an effective way to cool the hot urban area through a comparison of five graphs.
Research 3-2
Size of Urban: 20 vs. 60
The larger the water bodies that surround the urban area, the greater the effect of mitigating the heat island effect. When the water bodies occupy a larger area of the city, the winds blowing from the water into the urban are stronger, cooling the urban faster. Therefore, expanding the area of water surrounding the urban is an effective way to mitigate the heat island effect.
Research 4
Types of Forest
Evergreen Broadleaf Forest has a relatively high relative humidity, but the descending airflow is the smallest and the wind speed in the east-west direction is the largest. In other cases, we can find the Urban Heat Dome phenomenon which can intesify the UHI effect accept the evergreen broadleaf forest. Therefore, it is best suited to relieve stagnant heat in urban areas.