Initiation process of debris flows on different slopes due to surface flow and trigger-specific strategies for mitigating post-earthquake in old Beichuan County, China
文献类型：期刊论文
| 作者 | Zhuang, Jian-qi1; Cui, Peng2 ; Peng, Jian-bing1; Hu, Kai-heng2; Iqbal, Javed3
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| 刊名 | ENVIRONMENTAL EARTH SCIENCES
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| 出版日期 | 2013-03-01 |
| 卷号 | 68期号:5页码:1391-1403 |
| 关键词 | Debris flow Initiation process Mitigation strategies Old Beichuan County Wenchuan earthquake |
| ISSN号 | 1866-6280 |
| 通讯作者 | Zhuang, JQ |
| 英文摘要 | The 12 May 2008 Wenchuan earthquake (Ms 8.0) in China, produced an estimated volume of 28 x 10(8) m(3) loosened material, which led to debris flows after the earthquake. Debris flows are the dominant mountain hazards, and serious threat to lives, properties, buildings, traffic, and post-earthquake reconstruction in the earthquake-hit areas. It is very important to understand the debris flow initiation processes and characteristics, for designing debris flow mitigation. The main objective of this article is to examine the different debris flow initiation processes in order to identify suitable mitigation strategies. Three types of debris flow initiation processes were identified (designated as Types A, B, and C) by field survey and experiments. In "A" type initiation, the debris flow forms as a result of dam failure in the process of rill erosion, slope failure, landslide dam, or dam failure. This type of debris flow occurs at the slope of 10 +/- A 2A degrees, with a high bulk density, and several surges following dam failure. "B" type initiation is the result of a gradual increase in headward down cutting, bank and lateral erosion, and then large amount of loose material interfusion into water flow, which increases the bulk density, and forms the debris flow. This type of debris flow occurs mainly on slopes of 15 +/- A 3A degrees without surges. "C" type debris flow results from slope failures by surface flow, infiltration, loose material crack, slope failure, and fluidization. This type of debris flow occurs mainly on slopes of 21 +/- A 4A degrees, and has several surges of debris flow following slope failure, and a high bulk density. To minimize the hazards from debris flows in areas affected by the Wenchuan earthquake, the erosion control measures, such as the construction of grid dams, slope failure control measures, the construction of storage sediment dams, and the drainage measures, such as construction of drainage ditches are proposed. Based on our results, it is recommend that the control measures should be chosen based on the debris flow initiation type, which affects the peak discharge, bulk density and the discharge process. The mitigation strategies discussed in this paper are based on experimental simulations of the debris flows in the Weijia, Huashiban, and Xijia gullies of old Beichuan city. The results are useful for post-disaster reconstruction and recovery, as well as for preventing similar geohazards in the future. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| 类目[WOS] | Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Geology ; Water Resources |
| 关键词[WOS] | WENCHUAN EARTHQUAKE ; CENTRAL TAIWAN ; RAINFALL ; FAILURE ; IDENTIFICATION ; LANDSLIDES ; MECHANISMS ; COLORADO ; HAZARDS ; RUNOFF |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000314768900014 |
| 公开日期 | 2013-06-24 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/5453]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 作者单位 | 1.Changan Univ, Key Lab Western China Mineral Resources & Geol En, Sch Geol Engn & Surveying, Xian, Peoples R China 2.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, Chengdu, Peoples R China 3.COMSATS Inst Informat Technol, Dept Earth Sci, Abbottabad, Pakistan |
| 推荐引用方式 GB/T 7714 | Zhuang, Jian-qi,Cui, Peng,Peng, Jian-bing,et al. Initiation process of debris flows on different slopes due to surface flow and trigger-specific strategies for mitigating post-earthquake in old Beichuan County, China[J]. ENVIRONMENTAL EARTH SCIENCES,2013,68(5):1391-1403. |
| APA | Zhuang, Jian-qi,Cui, Peng,Peng, Jian-bing,Hu, Kai-heng,&Iqbal, Javed.(2013).Initiation process of debris flows on different slopes due to surface flow and trigger-specific strategies for mitigating post-earthquake in old Beichuan County, China.ENVIRONMENTAL EARTH SCIENCES,68(5),1391-1403. |
| MLA | Zhuang, Jian-qi,et al."Initiation process of debris flows on different slopes due to surface flow and trigger-specific strategies for mitigating post-earthquake in old Beichuan County, China".ENVIRONMENTAL EARTH SCIENCES 68.5(2013):1391-1403. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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