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首页> 外文会议>Erosion and sediment yields in the changing environment >A rare occurrence of landslides initiated by an extreme event in March 2007 in the Alligator Rivers Region, Australia
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A rare occurrence of landslides initiated by an extreme event in March 2007 in the Alligator Rivers Region, Australia

机译：2007年3月在澳大利亚鳄鱼河地区发生的极端事件引发的滑坡罕见

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摘要

The wettest water year on record at Jabiru Airport (2600 mm) in northern Australia occurred in 2006/07. A total of 1940 mm of rain fell in February and March 2007, with 737 mm occurring over 72 h between 28 February and 2 March. This rainfall and the associated flood event had return periods of at least 1:100 years on the annual maximum series. At least 49 landslides occurred on well vegetated, exhumed olivine dolerite surfaces surrounded by quartzose sandstone in the East Alligator River drainage basin. The number, extent, morphometry and soil properties of the landslides were determined using remote sensing imagery, combined with field and laboratory measurements. No evidence of previous mass movements on dolerite was found. The frequency of these mass movements is certainly much rarer than 1:100 years. Mass movements have not previously been considered a significant sediment source in this area because of their truly rare occurrence.
机译：澳大利亚北部的贾比鲁机场（2600毫米）有记录以来的最湿水年份是2006/07年度。 2007年2月和2007年3月，总共降雨量为1940 mm，在2月28日至3月2日的72小时内，共有737 mm降雨。降雨和相关的洪水事件在每年最大序列上的回归期至少为1：100年。在东鳄鱼河流域内，植被充分，发掘出的橄榄石白云石表面至少有49次滑坡，周围是石英砂岩。滑坡的数量，程度，形态和土壤特性是使用遥感影像结合野外和实验室测量来确定的。未发现先前在白云石上发生大规模运动的证据。这些群众运动的频率肯定比1：100年少得多。由于群众运动确实罕见，因此以前从未被视为该地区的重要沉积物来源。

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  • 来源
  • 会议地点 Chengdu(CN)
  • 作者

    M. J. SAYNOR; WAYNE D. ERSKINE; G. STABEN; J. LOWRY;

  • 作者单位

    Physico-Chemical Processes Group, Environmental Research Institute of the Supervising Scientist, GPO 461, Darwin NT 0801, Australia;

    Physico-Chemical Processes Group, Environmental Research Institute of the Supervising Scientist, GPO 461, Darwin NT 0801, Australia,School of Environmental Life Sciences, The University of Newcastle, PO Box 127, Ourimbah NSW 2258, Australia;

    Department of Natural Resources, Environment, the Arts and Sport, Northern Territory Government, Darwin, NT, Australia;

    Physico-Chemical Processes Group, Environmental Research Institute of the Supervising Scientist, GPO 461, Darwin NT 0801, Australia;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    mudslides; debris slides; landslide frequency; olivine dolerite; clay soils; extreme events;

    机译：泥石流;碎片滑梯；滑坡频率橄榄石白云石黏土极端事件;

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