Effects of earthquake-induced landslides on sediment budget and transport over a 50-yr period

Research Article| January 01, 1986 Effects of earthquake-induced landslides on sediment budget and transport over a 50-yr period A. J. Pearce; A. J. Pearce 1Forest Research Institute, P.O. Box 31-011, Christchurch, New Zealand Search for other works by this author on: GSW Google Scholar A. J. Watson A. J. Watson 1Forest Research Institute, P.O. Box 31-011, Christchurch, New Zealand Search for other works by this author on: GSW Google Scholar Geology (1986) 14 (1): 52–55. https://doi.org/10.1130/0091-7613(1986)14<52:EOELOS>2.0.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation A. J. Pearce, A. J. Watson; Effects of earthquake-induced landslides on sediment budget and transport over a 50-yr period. Geology 1986;; 14 (1): 52–55. doi: https://doi.org/10.1130/0091-7613(1986)14<52:EOELOS>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Landsliding during a magnitude 7.7 earthquake in 1929 in northwestern South Island, New Zealand, delivered up to ∼400 000 m3/km2 of sediment to stream channels. First- to third-order channels were buried to depths of as much as 10 m with sedimentary rock debris for distances ranging from <100 to ∼2000 m. Little sediment has been transported out of 65 km2 of the 92-km2 study area because of the coarse grain size of the sedimentary rock debris and trapping of sediment in numerous landslide-dammed lakes. Sand- and pebble-sized debris originating from landslides on a 6.6-km2 area of granite has been transported downstream no more than ∼10 km. At least 50% to 75% of this granitic debris is retained in the fourth-order 92-km2 catchment 50 yr after the earthquake. The long retention times of sediment and the volume of debris supplied by landslides during a large earthquake suggest that earthquake-induced landsliding is the principal sediment-supply mechanism in the region. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.