【摘要】 据研究,张家界国家森林公园在改善小气候、净化空气、增进人体的舒适感和调节人体功能方面,以及社会经济效能方面,均有显著的效益。与外界比较,公园内的日照可照时数约减少40%;日平均气温降低6℃,夏季全日气温均保持在22—28℃,150厘米以下终日存在逆温;空气相对湿度约增加10%;风速多小于1米/秒,80%以上时间是静风。森林公园内空气清洁,含尘量较外界减少88%,细菌含量减少97%。在公园内人体感觉舒适,人的脉博恢复率平均提高30%;辩听距离平均增加88%,血压也有所下降。森林公园的木材生产效益为126万元/年;释放氧气的价值为778000元/年;游憩效益和卫生保健效益分别为2400.88元/公颂·年和6214.78元/公颂·年。更多还原

【Abstract】 Zhang Jia Jie National Forest Park not only provides social and economic benefits but performs a variety of vital environmental functions. The duration of sunshine inthe park is reduced by 40% and the daily mean temperature drops 6℃. The temperatures remain 22—28℃ all day in summer and there is an inversion layer below 150 cm all the time. In addition, relative humidity of air increases by about 10%. The speed of wind is below 1 m/s and there is no wind al all over 80% of the time. Air in the forest park is fresh and clean with a 88% reduction in dust content and a 97% reduction in bacterium content. The park, therefore, constantly offers a comfortable environment for outdoor recreation.更多还原