IMHE OpenIR  > 成都山地所知识仓储(2009年以前)
A decade of earthflow research and interrelated studies in the North Island of New Zealand
Language英语
M. MARDEN, C. J. PHILLIPS1; R. J. JACKSON1; X. B. ZHANG2; J. EKANAYAKE3
Corresponding AuthorM. MARDEN, C. J. PHILLIPS
1992
Source PublicationErosion, debris flows and environment in mountain regions: Proceedings of the International Symposium held at Chengdu, China, 5-9 July 1992 (IAHS Publ. no. 209)
Author of SourceD. E. ; Davies, T. R. ; Hasholt, B
Volume209
Pages263-271
meetingErosion, debris flows and environment in mountain regions
Conference Date1992
Conference PlaceChengdu
CountryChina
PublisherIAHS
Contribution Rank2
AbstractResearch 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.
Other AbstractResearch 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.
Keywordearthflow Soil-water pore-water North Island New Zealand
ISBN0-947571-38-8
Indexed By其他
Document Type会议论文
Identifierhttp://ir.imde.ac.cn/handle/131551/21461
Collection成都山地所知识仓储(2009年以前)
Corresponding AuthorM. MARDEN, C. J. PHILLIPS
Affiliation1.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
Recommended Citation
GB/T 7714
M. MARDEN, C. J. PHILLIPS,R. J. JACKSON,X. B. ZHANG,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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