长白山天池地区泥石流激发雨型与临界雨量
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P642.2

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国家重点研发计划项目(2017YFC1501002);国家自然科学基金资助项目(41572302)


Reveal the Rainfall Type and Critical Rainfall of Debris Flow in Tianchi Area of Changbai Mountain
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National Key Research and Development Program (2017YFC1501002); National Natural Science Foundation of China (41572302)

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    摘要:

    长白山天池景区内受多条泥石流沟威胁,为降低泥石流灾害造成的损失与威胁,通过收集与整理该区域内泥石流活动历时资料与相应的降雨资料,分析各泥石流灾害暴发的降雨过程,获得长白山天池景区的泥石流激发雨型的特征,研究了降雨参数(降雨强度、历史累计雨量、前期有效降雨和降雨历时)与泥石流发生之间的关系,得到了长白山天池地区泥石流灾害暴发的临界雨量值。经研究表明,长白山天池地区泥石流激发雨型分为长期持续降雨与长期间断降雨两类,长期持续降雨型前期的有效降雨持续时间较长,总降雨时间也持续较长,泥石流在降雨量逐步达到临界值时暴发。长期间断降雨较长期持续降雨来说,总的降雨时间更长。该降雨类型的降雨强度存在多个由零到极大值再由极大值降低到零的重复过程,直到松散堆积体饱和导致泥石流暴发。再经统计与分析得出,长白山天池地区泥石流灾害暴发的防范雨量与预警指标(临界雨量),以历史累计降雨量43.5mm或前期有效降雨32.7mm可以作为防范值,以小时降雨强度19.7mm/h作为泥石流临界雨量,对不同的激发雨型特征与临界雨量的研究能够为长白山天池地区的泥石流灾害监测预警提供科学依据。

    Abstract:

    The Changbai Mountain Tianchi Scenic Area is threatened by a number of debris flow ditches. In order to reduce the losses and threats caused by mudslides, the rainfall process of debris flow disasters in each ditch is analyzed by collecting and sorting the debris flow activity data and corresponding rainfall data in the area, and obtaining Changbai Mountain. The debris flow in Tianchi area stimulates the characteristics of rain patterns, and studies the relationship between relevant rainfall parameters (hour rainfall intensity, historical accumulated rainfall, pre-effective rainfall and rainfall duration) and debris flow disasters, and obtains the criticality of debris flow disasters in Tianchi area of Changbai Mountain. Rainfall value. The research shows that the debris flow induced by the debris flow in the Tianchi area of Changbai Mountain is divided into long-term continuous rainfall and long-term rainfall. The long-term continuous rainfall type has long duration of uninterrupted rainfall, and the total rainfall time also lasts longer. The debris flow gradually reaches the rainfall intensity. Outbreaks at critical values. Long-term rainfall is longer than total long-term rainfall. The rainfall intensity of this rainfall type has a repeated process of increasing from zero to the maximum value and then decreasing until the final loose bulk is saturated to a critical value, resulting in a debris flow outbreak. According to statistics and analysis, the rainfall prevention and early warning indicators (critical rainfall) of the debris flow disaster in the Tianchi area of Changbai Mountain can be used as the prevention value with the historical accumulated rainfall of 43.5mm or the previous effective rainfall of 32.7mm. The hourly rainfall intensity is 19.7mm/h. As a critical rainfall of debris flow, the study of different types of induced rain patterns and critical rainfall can provide a scientific basis for monitoring and warning of debris flow disasters in the Tianchi area of Changbai Mountain.

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引用本文

罗小惠,裴向军,郭斌. 长白山天池地区泥石流激发雨型与临界雨量[J]. 科学技术与工程, 2020, 20(18): 7183-7191.
Luo Xiaohui, Pen Xiangjun, Guo Bin. Reveal the Rainfall Type and Critical Rainfall of Debris Flow in Tianchi Area of Changbai Mountain[J]. Science Technology and Engineering,2020,20(18):7183-7191.

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  • 收稿日期:2019-08-17
  • 最后修改日期:2020-04-15
  • 录用日期:2019-11-10
  • 在线发布日期: 2020-07-28
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