The factors caused debris flow in Northern Mountain of Beijing in 1991 were the precipitation, geomorphology, geologic structure, solid accumulation and the human activity.
北京北部山区的泥石流是降水、地貌、地质构造与固体堆积物及人类活动等因素长期共同作用的结果。
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The outcome will be guidance to the mountain Taishan tour planning and development, the study of mountain Taishan geomorphology and geology, the mountain Taishan environment and disaster protection.