Human Comfort Level of Typical Recreational Forests in Mountain Area of Southern Ji’nan in Summer

WANG Xiao-lei; XU Jing-wei; LI Chuan-rong; HU Ding-meng; ZHAO Zhen-lei

Based on the field observation data of microclimate factors in summer, the microclimate and human comfort effects of four typical recreational forests (Pinus tabulaeformis forest, Pinus tabulaeformis-Cotinus coggygria mixed forest, Robinia pseudoacacia forest, and economic forest) were analyzed in southern mountain area of Ji'nan. The results indicated that the recreational forests had significant effects on lowering the air temperature, increasing relative humidity, descending wind speed and enhancing human comfort level in summer. It showed definite differences in microclimate effects for different types of recreational forests. Compared with the contrast, the P. tabulaeformis forest, P. tabulaeformis-C. coggygria mixed forests, R. pseudoacacia forest and economic forest can lower the air temperature by 2.1, 2.75, 2.15, and 0.67 ℃; increase the humidity by 5.35%, 8.0%, 6.04%, and 2.92% and reduce the wind speed by 51.0%, 66.4%, 67.4%, and 37.0%. Recreational forests significantly prolonged the comfort by one to six hours; 8:00 to 10:00 and 17:00 to 18:00 were the most suitable time for outdoor activities which reached very comfort stage. Human comfort level was in the order of: P. tabulaeformis-C. coggygria mixed forest > Pinus tabulaeformis forest> R. pseudoacacia forest> economic forest. It is concluded that mixed forests is the best choice for outdoor activities which has the best effects on adjusting microclimate and human comfort level in summer.

1. Research Institute of Forestry, Chinese Academy of Forestry, Research Center of Urban Forest of the State Forestry Administration, Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China

Received Date: 2012-05-04

Abstract: Based on the field observation data of microclimate factors in summer, the microclimate and human comfort effects of four typical recreational forests (Pinus tabulaeformis forest, Pinus tabulaeformis-Cotinus coggygria mixed forest, Robinia pseudoacacia forest, and economic forest) were analyzed in southern mountain area of Ji'nan. The results indicated that the recreational forests had significant effects on lowering the air temperature, increasing relative humidity, descending wind speed and enhancing human comfort level in summer. It showed definite differences in microclimate effects for different types of recreational forests. Compared with the contrast, the P. tabulaeformis forest, P. tabulaeformis-C. coggygria mixed forests, R. pseudoacacia forest and economic forest can lower the air temperature by 2.1, 2.75, 2.15, and 0.67 ℃; increase the humidity by 5.35%, 8.0%, 6.04%, and 2.92% and reduce the wind speed by 51.0%, 66.4%, 67.4%, and 37.0%. Recreational forests significantly prolonged the comfort by one to six hours; 8:00 to 10:00 and 17:00 to 18:00 were the most suitable time for outdoor activities which reached very comfort stage. Human comfort level was in the order of: P. tabulaeformis-C. coggygria mixed forest > Pinus tabulaeformis forest> R. pseudoacacia forest> economic forest. It is concluded that mixed forests is the best choice for outdoor activities which has the best effects on adjusting microclimate and human comfort level in summer.

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Human Comfort Level of Typical Recreational Forests in Mountain Area of Southern Ji’nan in Summer

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