论文部分内容阅读
翻开北京的灾害史,至少有一半灾害曾经并将继续肆虐于京城内外,尤其是北京市市区所面临的自然灾害形势更为严峻:永定河河道的设防标准低,是北京洪涝灾害的一大隐患;随山洪暴发而来的泥石流多次
At least half of the disasters have been and will continue to wreak havoc on the capital and beyond. In particular, the natural disasters faced by the urban areas of Beijing are even more severe: the low standard of fortification of the Yongding River is one of the flood disasters in Beijing Major hidden dangers; debris flow from the flash floods many times