白龙江流域泥石流危险性评价

doi:10.16843/j.sswc.2018.04.011

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (2288 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract [Background] Debris flow is a widely distributed geological hazard in the mountainous area, and the hazard assessment of debris flow is essential for its prediction, risk evaluation and prevention. The Wenchuan earthquake has disturbed the geological condition of southern Gansu province,which not only produced abundant loose material to new debris flow formation but also triggered the recurrences of some debris flows in idle. The Bailong River Basin is located in the South Gansu province, where severe debris flow occurred during the Wenchuan earthquake in 2008, thus it was selected for this study.[Methods] A watershed unit was taken as the evaluation unit, and the evaluation unit was determined using GIS technology with digital elevation model (DEM) data. A debris flow hazard assessment model at watershed-scale was proposed based on the gradient of debris flow gully, the scale of debris flow and the level of potential river blockage. By applying the proposed hazard assessment model for Bailong River Basin, the hazard degree of debris flow was obtained as 5 levels of very high, high, moderate, low, and very low, and a hazard map of debris flows was constructed for Bailong River Basin.[Results] The assessment results indicated that there were 2 debris flows at very low hazardous level, accounting for 1.3% of the total debris flows, 31 debris flows (20.7%) at low level, 60 debris flows (40%) at moderate level, 19 debris flows (12.7%) at high level, and 38 debris flows (25.3%) at very high level. The 117 debris flow gullies were at the moderate hazardous level or above, accounting for 78% of 150 total gullies. Validated by the field investigation and historical debris flow events, the debris flows in Luojiayu, Sanyanyu, Yuzi, liangshui and Shimen gullies were at very high hazardous level, which was consistent with the assessment result.[Conclusions] It is scientific to take a watershed unit as evaluation unit because it can reflect the features of valleys, topography and landform conditions when debris flow occurs. On this basis, the assessment factors are selected from the debris flow energy, source and disaster degree to establish an index system for assessing the hazard of debris flow. Through field investigations, it is confirmed that the assessment results by model are consistent with the actual situation of debris flow, thus this model may be used to predict the occurrence of debris flow in the Bailong River Basin.

Key words： debris flow hazard assessment hydrological response unit Bailong River Basin

Received: 19 September 2017

PACS:

P694

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LI Shusong
	ZOU Qiang
	CHEN Rong
	TANG Jianxi

Cite this article:

LI Shusong,ZOU Qiang,CHEN Rong, et al. Hazard assessment of debris flow in Bailong River Basin[J]. SSWC, 2018, 16(4): 83-88.

URL:

http://journal12.magtechjournal.com/Jweb_stbc/EN/10.16843/j.sswc.2018.04.011 OR http://journal12.magtechjournal.com/Jweb_stbc/EN/Y2018/V16/I4/83

[1]	韩金华.基于GIS的白龙江流域泥石流危险性评价研究[D].兰州:兰州大学, 2010:13. HAN Jinhua. Study on the hazard assessment of debris flow in Bailong River basin based on GIS[D]. Lanzhou:Lanzhou University, 2010:13.
[2]	钟秀梅. 泥石流灾害的分形特征研究[D]. 兰州:兰州大学, 2008:1. ZHONG Xiumei. Study on fractal characteristics of debris flow disaster[D]. Lanzhou:Lanzhou University, 2008:1.
[3]	LIN J W, CHEN C W, PENG C Y. Kalman filter decision systems for debris flow hazard assessment[J]. Natural Hazards, 2012, 60(3):1255.
[4]	FAN L, LEHMANN P, MCARDELL B, et al. Linking rainfall-induced landslides with debris flows runout patterns towards catchment scale hazard assessment[J]. Geomorphology, 2017, 280:1.
[5]	IVERSON R M. Debris flows:Behaviour and hazard assessment[J]. Geology Today, 2014, 30(1):15.
[6]	韦方强,胡凯衡, LOPEZ J L,等.泥石流危险性动量分区方法与应用[J].科学通报,2003(3):29. WEI Fangqiang, HU Kaiheng, LOPEZ J L, et al. Method and its application of the momentum model for debris flow risk zoning[J]. Chinese Science Bulletin,2003(3):29.
[7]	邹强,崔鹏,杨伟.G318川藏公路段泥石流危险性评价[J].山地学报,2013,31(3):342. ZOU Qiang, CUI Peng, YANG Wei. Hazard assessment of debris flows along G318 Sichuan-Tibet highway[J]. Journal of Mountain Science,2013,31(3):342.
[8]	刘希林,庙成,田春山.区域滑坡和泥石流灾害两种危险性评价方法的比较分析[J].防灾减灾工程学报,2017,37(1):71. LIU Xilin,JIE Cheng,TIAN Chunshan. Comparative analysis of two methods for assessing hazard of landslide debris-flow on a regional scale[J].Journal of Disaster Prevention and Mitigation Engineering, 2017,37(1):71.
[9]	黄江成, 杨顺, 潘华利, 等.白龙江流域泥石流特征分析[J]. 水土保持通报, 2014, 34(1):311. HUANG Jiangcheng, YANG Shun, PAN Huali, et al. Analysis of debris flow characteristics in Bailong River Basin[J]. Bulletin of Soil and Water Conservation.2014,34(1)311.
[10]	GUZZETTI F, CARRARA A, CARDINALI M, et al. Landslide hazard evaluation:A review of current techniques and their application in a multi-scale study, central Italy[J]. Geomorphology, 1999, 31(1):181.
[11]	邹强, 唐建喜, 李淑松,等. 基于水文响应单元的泥石流灾害易发性分区方法[J]. 山地学报, 2017, 35(4):496. ZOU Qiang, TANG Jianxi, LI Shusong, et al. Susceptibility assessment method of debris flows based on hydrological response unit[J]. Journal of Mountain Science, 2017, 35(4):496.
[12]	陈莉.小流域泥石流灾害分析[D].四川绵阳:西南科技大学, 2016:29. CHEN Li. Analysis on debris flow disasters in small watershed[D]. Mianyang, Sichuan:Southwest University of Science and Technology, 2016:29.
[13]	庄建琦, 崔鹏, 葛永刚, 等."5·12"地震后都汶公路沿线泥石流沟危险性评价[J]. 四川大学学报(工程科学版), 2009, 41(3):131. ZHUANG Jianqi, CUI Peng, GE Yonggang, et al.Hazard assessment of debris flow valleys along Dujiangyan:Wenchuan highway after 5·12 Wenchuan devastating earthquake[J]. Journal of Sichuan University(Engineering Science Edition), 2009, 42(3):131.
[14]	HUNGR O, MORGAN G C, KELLERHALS R. Quantitative analysis of debris torrent hazards for design of remedial measures[J]. Canadian Geotechnical Journal, 1984, 21(4):663.
[15]	COSTA J E. Floods from dam failures[R]. Denver:US Geological Survey, 1985:85.
[16]	RICKENMANN D. Empirical relationships for debris flows[J]. Natural Hazards, 1999, 19(1):47.
[17]	CHEN N S, YANG C L, ZHOU W, et al. A new total volume model of debris flows with intermittent surges:based on the observations at Jiangjia Valley, southwest China[J]. Natural Hazards, 2011, 56(1):37.
[18]	唐邦兴. 山洪泥石流滑坡灾害及防治[M]. 北京:科学出版社, 1994:182. TANG Bangxing. Debris flow landslide disaster and prevention[M]. Beijing:Science Press, 1994:182.
[19]	欧国强, 游勇, 吕娟, 等. 南水北调西线一期工程区泥石流规模预测及其对调水工程的影响[J]. 山地学报, 2006(5):580. OU Guoqiang, YOU Yong, LÜ Juan, et al. Prediction of debris flow scale and its effect on water diversion project in the first stage of South-to-North Water Diversion Project[J]. Journal of Mountain Science, 2006(5):580.
[20]	四川省水利电力厅. 四川省中小流域暴雨洪水计算手册[M].1984:15. Water Resources and Electricity Office of Sichuan Province. Handbook of storm flood calculation for small and medium-sized watersheds[M]. 1984:15.
[21]	常鸣, 唐川, 苏永超, 等. 雅鲁藏布江米林段泥石流堆积扇危险范围预测模型[J].工程地质学报, 2012, 20(6):971. CHANG Ming, TANG Chuan, SU Yongchao, et al. Prediction model of dangerous range of debris flow accumulation fan in Yarlung Zangbo milin forest[J]. Journal of Engineering Geology, 2012, 20(6):971.