The Formation and Behaviour of Natural and Artificial Rockslide Dams; Implications for Engineering Performance and Hazard Management

Evans, Stephen G.; Delaney, Keith B.; Hermanns, Reginald L.; Strom, Alexander; Mugnozza, Gabriele Scarascia

doi:10.1007/978-3-642-04764-0_1

Cited by 53 publications

(37 citation statements)

References 167 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, there is hardly any work specifically on earthquake-induced landslide dams (Adams, 1981;Hancox et al, 1997;Evans et al, 2011), due to the scarcity of well-documented inventories. Much previous work is scattered in local case studies (e.g.…”

Section: Introductionmentioning

confidence: 98%

“…Strong earthquakes are among the prime triggering factors of landslides and landslide dams (Keefer, 1984;Evans et al, 2011). Studies on earthquake-induced landslide inventories, and the analysis of their controlling factors, causal mechanism and susceptibility or hazard assessment have been carried out by Jibson et al (2000), Lee et al (2008), Owen et al (2008), and Yin et al (2010).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of landslide dams induced by the 2008 Wenchuan earthquake

Fan

Westen

Liu

et al. 2012

Journal of Asian Earth Sciences

138

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Analysis of landslide dams induced by the 2008 Wenchuan earthquake

Fan

Westen

Liu

et al. 2012

Journal of Asian Earth Sciences

138

View full text Add to dashboard Cite

“…Strong earthquakes are a main triggering factor (Keefer 1984(Keefer , 2002Evans et al 2011). Typical examples of earthquake-induced barrier lakes can be referred to the Tsao-Ling landslide dam formed by Chi-Chi earthquake on September 21, 1999, in Taiwan (M w 7.6; Li et al 2002;Khazai and Sitar 2003), the EI Desagüe and Jiboa landslide dams in El Salvador on February 13, 2001 (M w 6.6; Baum et al 2001), the Higashitakezawa barrier lake formed by Niigata-ken Chuetsu earthquake on October 23, 2004, in Japan (M w 6.6; Furumura and Hayakawa 2007), HattianBala landslide dam formed by Kashmir earthquake on October 8, 2008, in Pakistan (M w 7.6; Sato et al 2007;Schneider et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Risk analysis and emergency actions for Hongshiyan barrier lake

Zhou¹,

Chen²,

Yu³

et al. 2015

Nat Hazards

View full text Add to dashboard Cite

This paper presents the emergency response to the barrier lake created by the Mw 6.5 earthquake on August 3, 2014, in Niulan River which is situated in Yunnan Province, southwest China. The lake, behind 83-to 103-m-high landslide dam, has a storage capacity of 260 million m 3 . The Hongshiyan hydropower station, situated just upstream of the landslide dam, was submerged by the lake water. The rescue actions include building an 8-m-deep drainage channel in the flood season, draining the lake water via a water release tunnel and rebuilding the landslide dam as a permanent structure. This paper presents the considerations and processes in deciding on the emergency actions. One major consideration is to minimize the hazards caused by a possible dam break flood induced by Hongshiyan barrier lake in the flood season. It was found that the barrier lake is classified as ''grade I: extremely high risk'' in which the 5-and 20-year floods should be used for design and check purposes of emergency works, respectively. The dam break flood evaluations indicated that an 8-m-deep diversion channel should be constructed in order to reduce the total amount of the released reservoir storage and to prevent possible overtopping of the downstream Huangjiaoshu rockfill dam. This study was based on an improved analytical approach to dam break flood modeling and a handy spread sheet developed by the authors. The considerations on various risks and the key analytical

show abstract

“…Landslide dams are common worldwide, especially in tectonically active mountain regions (Costa and Schuster 1988;Korup 2004;Evans et al 2011). They are extremely dangerous phenomena, as they may trigger devastating dam-break floods that can affect large areas downstream.…”

Section: Introductionmentioning

confidence: 99%

Characteristics and classification of landslide dams associated with the 2008 Wenchuan earthquake

Fan

Liu

Westen

et al. 2017

Geoenviron Disasters

View full text Add to dashboard Cite

Background: Strong earthquakes are among the prime triggering factors of landslides, which may block rivers, forming landslide dams. Some of these dams may pose serious threats to people and property due to upstream inundation and downstream dam-breach flooding. Evaluating the stability and potential hazard of landslide dams is significant for the mitigation measures, but remains challenging. The 2008 Wenchuan earthquake (M w 7.9) in China triggered numerous landslides over a broad area, some of which dammed rivers, posing severe threats to downstream settlements. Our previous study created one of the most complete landslide dam inventories including detailed geomorphic parameters of 828 landslide dams induced by the Wenchuan earthquake. This paper presents the study of a number of representative landslide dams associated with the 2008 Wenchuan earthquake. Results: The coseismic landslides were classified into rock/debris avalanches, debris flows, rock/debris slides and rock falls. According to dam composition material and sedimentological features, landslide dams were categorized into three types: dams mainly composed of large boulders and blocks; dams composed of unconsolidated fine debris; and dams with partly intact rock strata at the base topped by large boulders and blocks or soil with rock fragments, showing two-layered or three-layered depositional structure. This classification is linked to the typology of damming landslides and considered to be a preliminary indicator of dam stability. In addition, dam stability also largely depends on valley morphometry as well as landslide runout distance and mechanism. The post-earthquake debris flow damming events induced by subsequent rainfalls are also introduced. It was found that there is still a large amount of loose sediment remaining on the slope, which may continue promoting heavy debris flows and dams in the coming years or decades. Conclusions: The classification of landslide dams proposed in this study can be used as a preliminary indicator of dam stability. More reliable assessment requires a geotechnical approach taking into account a variety of dynamic loading scenarios, and also relies on knowledge about the accurate dam and barrier-lake geometry. There is still a large amount of loose sediment remaining on the slopes, which may be reactivated and remobilized during the heavy post-earthquake rainstorms. Therefore, predicting the post-earthquake debris flows and evaluating their potential for damming rivers are still of great concern and remain as a main challenge.

show abstract

The Formation and Behaviour of Natural and Artificial Rockslide Dams; Implications for Engineering Performance and Hazard Management

Cited by 53 publications

References 167 publications

Analysis of landslide dams induced by the 2008 Wenchuan earthquake

Analysis of landslide dams induced by the 2008 Wenchuan earthquake

Risk analysis and emergency actions for Hongshiyan barrier lake

Characteristics and classification of landslide dams associated with the 2008 Wenchuan earthquake

Contact Info

Product

Resources

About