scholarly journals Empirical prediction for travel distance of channelized rock avalanches in the Wenchuan earthquake area

2017 ◽  
Vol 17 (6) ◽  
pp. 833-844 ◽  
Author(s):  
Weiwei Zhan ◽  
Xuanmei Fan ◽  
Runqiu Huang ◽  
Xiangjun Pei ◽  
Qiang Xu ◽  
...  
Keyword(s):  
Wenchuan Earthquake ◽  
Prediction Models ◽  
Rock Avalanche ◽  
Travel Distance ◽  
Validation Dataset ◽  
Good Prediction ◽  
2008 Wenchuan Earthquake ◽  
The 2008 Wenchuan Earthquake ◽  
Rock Avalanches ◽  
Landslide Volume

Abstract. Rock avalanches are extremely rapid, massive flow-like movements of fragmented rock. The travel path of the rock avalanches may be confined by channels in some cases, which are referred to as channelized rock avalanches. Channelized rock avalanches are potentially dangerous due to their difficult-to-predict travel distance. In this study, we constructed a dataset with detailed characteristic parameters of 38 channelized rock avalanches triggered by the 2008 Wenchuan earthquake using the visual interpretation of remote sensing imagery, field investigation and literature review. Based on this dataset, we assessed the influence of different factors on the runout distance and developed prediction models of the channelized rock avalanches using the multivariate regression method. The results suggested that the movement of channelized rock avalanche was dominated by the landslide volume, total relief and channel gradient. The performance of both models was then tested with an independent validation dataset of eight rock avalanches that were induced by the 2008 Wenchuan earthquake, the Ms 7.0 Lushan earthquake and heavy rainfall in 2013, showing acceptable good prediction results. Therefore, the travel-distance prediction models for channelized rock avalanches constructed in this study are applicable and reliable for predicting the runout of similar rock avalanches in other regions.

scholarly journals Empirical prediction for travel distance of channelized rock avalanches in the Wenchuan earthquake area

2016 ◽  
Author(s):  
Weiwei Zhan ◽  
Xuanmei Fan ◽  
Runqiu Huang ◽  
Xiangjun Pei ◽  
Qiang Xu ◽  
...  
Keyword(s):  
Wenchuan Earthquake ◽  
Prediction Models ◽  
Rock Avalanche ◽  
Field Investigation ◽  
Travel Distance ◽  
Validation Dataset ◽  
Good Prediction ◽  
Visual Interpretation ◽  
Rock Avalanches ◽  
Landslide Volume

Abstract. Rock avalanches are extremely rapid, massive flow-like movements of fragmented rock. The travel path of the rock avalanches may be confined by channels in some cases, which were named as the channelized rock avalanches. Channelized rock avalanches are potentially dangerous due to their hardly predictable travel distance. In this study, we constructed a dataset with detailed characteristic parameters of 38 channelized rock avalanches triggered by the 2008 Wenchuan earthquake using the visual interpretation of remote sensing imagery, field investigation, and literature review. Based on this dataset, we assessed the influence of different factors on the runout distance and developed prediction models of the channelized rock avalanches using the multivariate regression method. The results suggested that the movement of channelized rock avalanche was dominated by the landslide volume, total relief, and channel gradient. The performance of both models was then tested with an independent validation dataset of 8 rock avalanches that induced by the 2008 Wenchuan, the Ms7.0 Lushan earthquake, and heavy rainfall in 2013, showing acceptable good prediction results. Therefore, the travel distance prediction models for channelized rock avalanches constructed in this study is applicable and reliable for predicting the run out of similar rock avalanches in other regions.

Source characteristics of long runout rock avalanches triggered by the 2008 Wenchuan earthquake, China

2011 ◽  
Vol 40 (4) ◽  
pp. 896-906 ◽  
Author(s):  
Shengwen Qi ◽  
Qiang Xu ◽  
Bing Zhang ◽  
Yuande Zhou ◽  
Hengxing Lan ◽  
...  
Keyword(s):  
Wenchuan Earthquake ◽  
Long Runout ◽  
2008 Wenchuan Earthquake ◽  
Source Characteristics ◽  
The 2008 Wenchuan Earthquake ◽  
Rock Avalanches

scholarly journals An evaluation of influential factors on landslide mobility during the 2008 Wenchuan earthquake

2014 ◽  
Vol 2 (1) ◽  
pp. 613-647 ◽  
Author(s):  
D. P. Guo ◽  
M. Hamada ◽  
C. He
Keyword(s):  
Wenchuan Earthquake ◽  
Rock Type ◽  
Multivariable Analysis ◽  
Slope Angle ◽  
Influential Factors ◽  
2008 Wenchuan Earthquake ◽  
The 2008 Wenchuan Earthquake ◽  
Landslide Volume ◽  
Geological Conditions ◽  
Landslide Mobility

Abstract. The 2008 Wenchuan earthquake triggered a huge amount of landslides along the Longmenshan thrust belt zone in southwest China. It is essential to evaluate the effects of numerous influential factors on landslide mobility, as a result of having seriously endangered the lives and properties along travel path. Hence, the relations between equivalent coefficient of friction (μ = Hmax / Hmax) and other six parameters of 46 landslides, such as three topographical factors, landslide volume, horizontal peak ground acceleration (PHA) and rock type, have been qualitatively analyzed by means of simplified plots and regressions. The quantitative effectiveness of each factor on landslide mobility was revealed by multivariable analysis and it was found that slope height, rock type, slope transition angle and landslide volume were more influential than slope angle and seismic acceleration. The statistical significance tests and predictive results both demonstrated that the empirical-statistical model of landslide mobility yielded a satisfactory agreement between observations and predictions, therefore, the presented model could be practically applicable in similar geological conditions as Wenchuan earthquake affected area.

scholarly journals A longitudinal study on emotional distress among local government staff seven years after the 2008 Wenchuan earthquake in China

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Yunge Fan ◽  
Lili Guan ◽  
Hu Xiang ◽  
Xianmei Yang ◽  
Guoping Huang ◽  
...  
Keyword(s):  
Longitudinal Study ◽  
Local Government ◽  
Wenchuan Earthquake ◽  
Emotional Distress ◽  
Early Stage ◽  
2008 Wenchuan Earthquake ◽  
The 2008 Wenchuan Earthquake ◽  
One Year ◽  
Self Reporting Questionnaire ◽  
Over Time

Abstract Background The current study examined the change in local government staff’s emotional distress over 7 years after the 2008 Wenchuan earthquake, and the influence of earthquake exposure and professional quality of life (ProQOL) on emotional distress. Methods This longitudinal study assessed 250 participants at 1 year after the earthquake; 162 (64.8%) were followed up at 7 years. Emotional distress was assessed with the Self-Reporting Questionnaire (SRQ) at both time points. We assessed ProQOL, including compassion satisfaction, burnout, and secondary traumatic stress, and earthquake exposure at 1 year. Wilcoxon signed-rank tests were performed to test longitudinal changes in emotional distress. Hierarchical multiple regression was conducted to examine the effect of earthquake exposure and ProQOL. Results The positive screening rate of emotional distress (SRQ ≥ 8) was 37.6 and 15.4% at one and 7 years, respectively. Emotional distress scores declined over time (p < 0.001). Earthquake exposure and ProQOL predicted one-year (ps < 0.05) but not seven-year emotional distress, whereas burnout predicted both one-year (p = 0.018) and seven-year (p = 0.047) emotional distress. Conclusions Although emotional distress can recover over time, it persists even 7 years later. Actions to reduce burnout during the early stage of post-disaster rescue have long-term benefits to staff’s psychological outcomes.

Features and genesis of micro-nanometer-sized grains on shear slip surface of the 2008 Wenchuan earthquake

2014 ◽  
Vol 57 (8) ◽  
pp. 1961-1971 ◽  
Author(s):  
RenMao Yuan ◽  
BingLiang Zhang ◽  
XiWei Xu ◽  
ChuanYong Lin ◽  
LanBing Si ◽  
...  
Keyword(s):  
Wenchuan Earthquake ◽  
Slip Surface ◽  
2008 Wenchuan Earthquake ◽  
The 2008 Wenchuan Earthquake ◽  
Shear Slip
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