A decade of earthflow research and interrelated studies in the North Island of New Zealand
(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
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
1992
会议名称Erosion, debris flows and environment in mountain regions
卷号209
页码263-271
会议日期1992
会议地点Chengdu, China
会议举办国China
会议录编者/会议主办者D. E. ; Davies, T. R. ; Hasholt, B
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
语种英语
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
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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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