[1]张添锋,郭朝旭.福建山区泥石流临界降雨阈值[J].山地学报,2021,(5):701-709.[doi:10.16089/j.cnki.1008-2786.000631)]
 ZHANG Tianfeng,GUO Chaoxu.Rainfall Threshold of Debris Flow in Fujian Mountainous Area, China[J].Mountain Research,2021,(5):701-709.[doi:10.16089/j.cnki.1008-2786.000631)]
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福建山区泥石流临界降雨阈值
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2021年第5期
页码:
701-709
栏目:
山地灾害
出版日期:
2021-11-30

文章信息/Info

Title:
Rainfall Threshold of Debris Flow in Fujian Mountainous Area, China
文章编号:
1008-2786-(2021)5-701-9
作者:
张添锋12 郭朝旭123
1.自然资源部丘陵山地地质灾害防治重点实验室,福州 350002; 2.福建省地质工程勘察院 福建省地质工程重点实验室,福州 350002; 3.福建省建筑科学研究院有限责任公司 福建省绿色建筑重点实验室,福州 350002
Author(s):
ZHANG Tianfeng12 GUO Chaoxu123
1. Key Laboratory of Geohazard Prevention of Hilly Mountains, Ministry of Land and Resources,Fuzhou 350002, China; 2. Fujian Key Laboratory of Geohazard Prevention, Geological Engineering Survey in Fujian Province, Fuzhou 350002, China; 3. Fujian Key Laboratory of Green Building Technology, Fujian Academy of Building Research Co Ltd., Fuzhou 350002, China
关键词:
福建山区 临界降雨阈值 泥石流启动条件 前期有效降雨量
分类号:
P694
DOI:
10.16089/j.cnki.1008-2786.000631)
文献标志码:
A
摘要:
泥石流的降雨预警指标常常选用前期有效降雨量和激发雨强进行评价,而前期有效降雨的关键在于确定前期降雨影响天数和日降雨衰减系数。福建山区每年发生的泥石流众多且危害大。本文结合福建山区降雨特点,总结了前期有效降雨量确定方法以及福建区域的泥石流概况,通过对比历史数据8 d及14 d前期降雨量,确定了 8 d 作为前期有效降雨量影响时间; 通过引入格拉布斯准则剔除异常数据和利用凸包算法寻找散点数据的外边界,建立了前期有效降雨量与1 h激发雨量的幂指数关系; 最后根据福建地区的泥石流发育特征,分析了泥石流降雨阈值预测模型的影响因素及未来改进方向。结果表明福建省泥石流类型主要为坡面型泥石流,且利用前期有效降雨量和短历时强降雨量建立的阈值模型f(h60,Re)=h60-38.93Re-0.12(h60为小时降雨量; Re为前期有效降雨量)在泥石流启动方面获得较好的预测效果; 单沟泥石流的启动除了降雨外还与下垫面的地形和物源量存在一定的联系。本研究可为福建地区多植被覆盖区泥石流的降雨阈值模型提供一种改进方法与思路。

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备注/Memo

备注/Memo:
收稿日期(Received date):2020-07-23 修订日期(Accepted date): 2021-10-21
基金项目(Foundation item):福建省生态地质项目(闽地环务[2021]56号)[Fujian Eco-Geological Project(Fujian Bureau of Geology and Mineral Resources Development [2021] No. 56)]
作者简介(Biography):张添锋(1987-),男,福建福州人,硕士,工程师,主要研究方向:地质灾害防治。[ZHANG Tianfeng(1987-), male, born in Fuzhou, Fujian province, M.Sc, research on debris flow initiation and erosion mechanism] E-mail: 773973133@qq.com
更新日期/Last Update: 2021-09-30