Effects of spillway types on debris flow trajectory and scour behind a sabo dam

详细信息    查看全文

• 作者：Hua-yong Chen ; Peng Cui ; Jian-gang Chen ; Jin-bo Tang
• 关键词：Debris Flow ; Spillway ; Sabo dam ; Flow trajectory ; Velocity ; Scour
• 刊名：Journal of Mountain Science
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：13
• 期：2
• 页码：203-212
• 全文大小：4,340 KB
• 参考文献：Cui P, Zhou GD, Zhu XH, Zhang JQ (2013) Scale amplification of natural debris flows caused by cascading landslide dam failures.. Geomorphology 182: 173–189. DOI: 10.1016/ j.geomorph.2012.11.009CrossRef
  Dey S, Barbhuiya AK (2004) Clear-water scour at abutments in thinly armored beds. Journal of Hydraulic. Engineering 130(7): 622–634. DOI: 10.1061/(ASCE)0733-9429
  Einstein HA (1950) The bed-load function for sediment transportation in open channel flows. US Department of Agriculture, Washington, DC, USA.
  Huang RQ (2011) Geo-engineering lessons learned from the 2008 Wenchuan earthquake in Sichuan and their significance to reconstruction. Journal of Mountain. Science 8(2): 176–189. DOI: 10.1007/s11629-011-2103-x
  Hsieh HM, Luo CR, Yang JC, Chen RF (2013) Numerical study of the effects of check dams on erosion and sedimentation in the Pachang River. International Journal of Sediment. Research 28(3): 304–315. DOI: 10.1016/S1001-6279(13)60041-4
  Iverson RM (1997) The physics of debris flows. Reviews of. geophysics 35(3): 245–296. DOI: 10.1029/97rg00426CrossRef
  Jaeggi MNR, Pellandini S (1997) Torrent check dams as a control measure for debris flows. Springer Berlin Heidelberg: 186–207. DOI: 10.1007/bfb0117769
  Lenzi MA, Comiti F (2003) Local scouring and morphological adjustments in steep channels with check-dam sequences.. Geomorphology 55(1): 97–109. DOI: 10.1016/S0169-555X (03)00134-XCrossRef
  Lien HP (1995) Scouring phenomenon of the channel bed below a sabo-dam. Research of Soil and Water. Conservation 2(3): 45–49. (In Chinese)
  Ma C, Hu KH, Tian M (2013) Comparison of debris-flow volume and activity under different formation conditions. Natural. hazards 67(2): 261–273. DOI: 10.1007/s11069-013-0557-6CrossRef
  Pan HL, Yang S, Ou GQ, Huang JC (2013a) Local scour and the laws of scour pit’s shape of debris flow sabo dam downstream of debris flow sabo dam. Journal of Mountain. Science 10(6): 1063–1073. DOI: 10.1007/s11629-013-2362-9
  Pan HL, Wang R, Huang JC, Ou GQ (2013b) Study on the ultimate depth of scour pit downstream of debris flow sabo dam based on the energy method. Engineering. Geology 160: 103–109. DOI: 10.1016/j.enggeo.2013.03.026
  Shrestha BB, Nakagawa H, Kawaike K (2008) Numerical and experimental study on debris-flow deposition and erosion upstream of a check dam. Annual Journal of Hydraulic Engineering,. JSCE 52: 139–144.
  Shrestha BB, Nakagawa H, Kawaike K (2009) Capturing process of debris flow with driftwood by an open type check dam. Annuals of Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan. 52 B: 697–715.
  Stein OR, Julien PY, Alonso CV (1993) Mechanics of jet scour downstream of a headcut. Journal of hydraulic. research 31(6): 723–738. DOI: 10.1080/00221689309498814
  Xu Q, Zhang S, Li WL (2012) The 13 August 2010 catastrophic debris flows after the 2008 Wenchuan earthquake, China. Natural Hazards and Earth System. Sciences 12: 201–216. DOI: 10.5194/nhess-12-201-2012
  Yanmaz MA, Kose O (2007) Time-wise variation of scouring at bridge abutments.. Sadhana 32(3): 199–213. DOI: 10.1007/s12046-007-0018-6CrossRef
  Zeng QL, Yue ZQ, Yang ZF, Zhang XJ (2009) A case study of long-term field performance of check-dams in mitigation of soil erosion in Jiangjia stream, China. Environmental Geology 58(4): 897–911. DOI: 10.1007/s00254-008-1570-zCrossRef
  
• 作者单位：Hua-yong Chen (1)
  Peng Cui (1) (2)
  Jian-gang Chen (1)
  Jin-bo Tang (1)
  
  1. Key Laboratory of Mountain Hazards and Earth Surface Process, Institute of Mountain Hazards and Environment, CAS, Chengdu, 610041, China
  2. CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China
  
• 刊物主题：Earth Sciences, general; Geography (general); Environment, general; Ecology;
• 出版者：Springer Berlin Heidelberg
• ISSN：1993-0321

文摘

Debris flows are one of the common natural hazards in mountainous areas. They often cause devastating damage to the lives and property of local people. The sabo dam construction along a debris flow valley is considered to be a useful method for hazard mitigation. Previous work has concentrated on the different types of sabo dams such as close-type sabo dam, open-type sabo dam. However, little attention has been paid to the spillway structure of sabo dam. In the paper, a new type of spillway structure with lateral contraction was proposed. Debris flow patterns under four different spillway structures were investigated. The projection theory was employed to predict trajectory of debris flow out from the spillway and to estimate the incident angle and terminal velocity before it plunged into the scour hole behind the sabo dam. The results indicated that the estimated data were in good agreement with the experimental ones. The discrepancy between the estimated and experimental values of main parameters remained below 21.82% (relative error). Additionally, the effects of debris flow scales under different spillway structures were considered to study the scour law. Although the debris flow pattern and scour law behind the sabo dam under different operating conditions was analyzed in this paper, further study on the scour mechanism and the maximum scour depth estimation based on scour theory is still required in the future.