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城市绿化对防震防火、减轻地震灾害有不可忽视的作用。1976年7月北京受唐山地区地震的波及时,15处公园,总面积400余顷,疏散居民20多万人,平均每公顷容纳500人,因为一般地震情况下,树木不致倒伏,可以利用树木搭棚,创造了临时避震的生活环境。1923年9月,日本关东地区发生大地震,震中8.3级,东京距离震中不到100公里,地震发生后不到半小时就有136
Urban greening has a non-negligible role in preventing earthquakes and preventing fire and reducing earthquake disasters. In July 1976, Beijing was affected by the waves of the Tangshan area in time. There were 15 parks with a total area of more than 400 hectares. More than 200,000 people were evacuated. The average number of people per hectare was 500. In general earthquakes, the trees did not fall down and trees could be used. The scaffolding creates a temporary shock living environment. In September 1923, a major earthquake occurred in the Kanto region of Japan. The epicenter was 8.3. Tokyo was less than 100 kilometers away from the epicenter and 136 hours after the earthquake.