An earth systems approach to understanding the tectonic and cultural landscapes of linked marine embayments: Avon‐Heathcote Estuary (Ihutai) and Lake Ellesmere (Waihora), New Zealand
An earth systems approach to understanding the tectonic and cultural landscapes of linked marine embayments: Avon‐Heathcote Estuary (Ihutai) and Lake Ellesmere (Waihora), New Zealand
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采用地球系统方法来了解相连的海洋海湾的构造和文化景观：埃文-希思科特河口（Ihutai）和埃尔斯米尔湖（Waihora），新西兰
DOI：
10.1002/jqs.907
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
J. Goff
中科院分区：
文献类型：
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作者：
B. McFadgen;J. Goff
对新西兰埃文-希思科特河口（伊胡泰）的地球系统研究表明，构造活动对该地区的地貌和人类住区具有明显的直接和间接控制作用。我们讨论了海湾的全新世晚期历史与大地震及其后果的关系。特别值得注意的是，沙子迅速通过河流转移到海岸，造成沙丘形成，较粗的沉积物的脉冲更延迟，造成Waimakariri河的河道撕裂。虽然沙丘系统的发展似乎发生在构造活动之后不久，但河道撕裂、沙嘴/屏障的形成和正在进行的地貌变化可能与100-200年前发生的构造活动有关。这两种沉积物输送系统之间的相互作用导致沿海地貌和生态系统发生重大而且往往迅速的变化，对生活在沿海或沿海附近的人口产生严重影响。通过比较两个海湾，我们展示了构造活动的直接和间接影响的更广泛的区域范围，这两个海湾代表了Waimakariri河洪泛区两端的沿海入口点：Avon-Heathcote河口（Ihutai）和Ellesmere湖（Waihora）。版权所有© 2005年约翰威利父子有限公司。
An earth systems study of the Avon‐Heathcote Estuary (Ihutai), New Zealand, shows that tectonic activity has a marked direct and indirect control upon its geomorphology and human settlement in the area. We discuss the Late Holocene history of the embayment in relation to large earthquakes and their after‐effects. Of particular note is the rapid fluvial transfer of sand to the coast causing dune formation and a more delayed pulse of coarser sediment causing channel avulsion of the Waimakariri River. While dune system development seems to occur soon after tectonic activity, river channel avulsion, spit/barrier formation and ongoing geomorphological changes may well relate to periods of tectonic activity that occurred 100–200 years previously. The interaction between these two sediment delivery systems causes significant, and often rapid, changes to coastal geomorphology and ecosystems that have serious implications for human populations living at or near the coast. We show a more region‐wide picture of the direct and indirect effects of tectonic activity, by comparing two embayments that represent coastal points of entry at opposite ends of the Waimakariri River floodplain: the Avon‐Heathcote Estuary (Ihutai) and Lake Ellesmere (Waihora). Copyright © 2005 John Wiley & Sons, Ltd.