Three-dimensional mapping of a landslide using a multi-geophysical approach: the Quesnel Forks landslide

被引：154

作者：

Bichler, A. ^{[1
]}

Bobrowsky, P. ^{[2
]}

Best, M. ^{[3
]}

Douma, M. ^{[2
]}

Hunter, J. ^{[2
]}

Calvert, T. ^{[2
]}

Burns, R. ^{[2
]}

机构：

[1] Univ Victoria, Sch Earth & Ocean Sci, Victoria, BC V8W 3P6, Canada

[2] Geol Survey Canada, Nat Resources Canada, Ottawa, ON K1A 0E8, Canada

[3] Bemex Consulting Int Ltd, Victoria, BC V8Y 2L4, Canada

来源：

LANDSLIDES | 2004年 / 1卷 / 01期

关键词：

Landslide; Mapping; Geophysics; 3-dimensional; Canada; British Columbia; Quesnel Forks;

D O I：

10.1007/s10346-003-0008-7

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

A landslide located on the Quesnel River in British Columbia, Canada is used as a case study to demonstrate the utility of a multi-geophysical approach to subsurface mapping of unstable slopes. Ground penetrating radar (GPR), direct current (DC) resistivity and seismic reflection and refraction surveys were conducted over the landslide and adjacent terrain. Geophysical data were interpreted based on stratigraphic and geomorphologic observations, including the use of digital terrain models (DTMs), and then integrated into a 3-dimensional model. GPR surveys yielded high-resolution data that were correlated with stratigraphic units to a maximum depth of 25 m. DC electrical resistivity offered limited data on specific units but was effective for resolving stratigraphic relationships between units to a maximum depth of 40 m. Seismic surveys were primarily used to obtain unit boundaries up to a depth of >80 m. Surfaces of rupture and separation were successfully identified by GPR and DC electrical resistivity techniques.

引用

页码：29 / 40

页数：12

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