A decade of earthflow research and interrelated studies in the North Island of New Zealand
语种英语
(1)M. MARDEN, C. J. PHILLIPS; (1)R. J. JACKSON; (2)X. B. ZHANG; (3)J. EKANAYAKE
通讯作者M. MARDEN, C. J. PHILLIPS
1992
会议录名Erosion, debris flows and environment in mountain regions
会议录编者/会议主办者D. E. ; Davies, T. R. ; Hasholt, B
卷号209
页码263-271
会议日期1992
会议地点Chengdu, China
会议举办国China
出版者IAHS
摘要Research on earthflows and inter-related processes in the eastern North Island, New Zealand, is reviewed. Early studies indicated strong coherent spatial movement patterns within individual flows. Maximum surface velocities of 3.6 to 20.4 m year"1 were seasonally consistent. Surface movement rates on forested flows were 2-3 orders of magnitude less than those on grassed earthflows. Subsurface deformation accounted for less than 25% of total surface movement. Subsurface deformation results largely from compression flow on forested earthflows and from extension flow on grassed earthflows. Soil-water measurements indicated a shorter period of high winter soil-water content under forest stands than under clearfelled sites. Tree roots influence earthflow movement by creating a reinforced upper layer 1-2 m thick that has significant tensional strength and higher shear strength than the underlying flow material. Future research will focus on earthflow material properties, and pore-water pressure development.
其他摘要Research on earthflows and inter-related processes in the eastern North Island, New Zealand, is reviewed. Early studies indicated strong coherent spatial movement patterns within individual flows. Maximum surface velocities of 3.6 to 20.4 m year"1 were seasonally consistent. Surface movement rates on forested flows were 2-3 orders of magnitude less than those on grassed earthflows. Subsurface deformation accounted for less than 25% of total surface movement. Subsurface deformation results largely from compression flow on forested earthflows and from extension flow on grassed earthflows. Soil-water measurements indicated a shorter period of high winter soil-water content under forest stands than under clearfelled sites. Tree roots influence earthflow movement by creating a reinforced upper layer 1-2 m thick that has significant tensional strength and higher shear strength than the underlying flow material. Future research will focus on earthflow material properties, and pore-water pressure development.
关键词earthflow Soil-water pore-water North Island New Zealand
ISBN号0-947571-38-8
收录类别其他
文献类型会议论文
条目标识符http://ir.imde.ac.cn/handle/131551/21461
专题成都山地所知识仓储(2009年以前)
作者单位1.Forest Research Institute, PO Box 31011, Christchurch, New Zealand;
2.Institute of Mountain Hazards and Environment, Chengdu, China;
3.Natural Resources Engineering, Lincoln University, Canterbury, New Zealand
第一作者单位Forest Research Institute, PO Box 31011, Christchurch, New Zealand
通讯作者单位Forest Research Institute, PO Box 31011, Christchurch, New Zealand
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et al. A decade of earthflow research and interrelated studies in the North Island of New Zealand[C]//D. E., Davies, T. R., Hasholt, B:IAHS,1992:263-271.
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