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Impact of Earthquake-triggered Landslides on Catchment Sediment Yield : Volume 367, Issue 367 (03/03/2015)

By Vanmaercke, M.

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Book Id: WPLBN0003990187
Format Type: PDF Article :
File Size: Pages 6
Reproduction Date: 2015

Title: Impact of Earthquake-triggered Landslides on Catchment Sediment Yield : Volume 367, Issue 367 (03/03/2015)  
Author: Vanmaercke, M.
Volume: Vol. 367, Issue 367
Language: English
Subject: Science, Proceedings, International
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Obreja, F., Poesen, J., & Vanmaercke, M. (2015). Impact of Earthquake-triggered Landslides on Catchment Sediment Yield : Volume 367, Issue 367 (03/03/2015). Retrieved from

Description: Department of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, 3001 Heverlee, Belgium. This study explores the role of seismic activity in explaining spatial and temporal variation in sediment export from the Siret basin in Romania. Based on long-term (>30 years) sediment export measurements for 38 subcatchments, we found that spatial variation in sediment yield (SY) is strongly correlated to the degree of seismic activity and catchment lithology. Combined, these factors explain 80% of the variation in SY. To investigate the role of earthquake-triggered landslides in explaining these correlations, we studied the temporal variability in sediment concentrations before and after the 7.4 Mw earthquake of 1977 for ten subcatchments. Despite the fact that this earthquake triggered many landslides, only one subcatchment showed a clear (3-fold) increase in sediment concentration per unit discharge after the earthquake. This shows that, although prolonged seismic activity strongly controls average SY, individual earthquakes do not necessarily affect sediment export at short timescales.

Impact of earthquake-triggered landslides on catchment sediment yield


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