Anthropogenic influence on sedimentation during the last 100 years inferred from magnetic properties in the Changjiang Estuary, China

被引：6

作者：

Wang, Yonghong ^{[1
,2
]}

Oguchi, Takashi ^{[3
]}

Ridd, Peter V. ^{[4
]}

Shen, Huanting ^{[5
]}

机构：

[1] Ocean Univ China, Minist Educ, Key Lab Submarine Geosci & Prospecting Tech, Qingdao 266100, Peoples R China

[2] Minist Land & Resources, Key Lab Marine Hydrocarbon Resources & Environm G, Qingdao 266071, Peoples R China

[3] Univ Tokyo, Ctr Spatial Informat Sci, Kashiwa, Chiba 2778568, Japan

[4] James Cook Univ, Sch Engn & Phys Sci, Marine Geophys Lab, Townsville, Qld 4811, Australia

[5] E China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R China

来源：

ENVIRONMENTAL EARTH SCIENCES | 2013年 / 70卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Sediments; The Changjiang Estuary; Human activities; Magnetic properties; YANGTZE-RIVER DELTA; YELLOW-RIVER; HUMAN IMPACT; EVOLUTION; LAKE; SEA; DISCRIMINATION; CATCHMENT; MOUTH; SIZE;

D O I：

10.1007/s12665-013-2254-x

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A 100-year sedimentary record in the Changjiang Estuary was examined to elucidate natural and anthropogenic influences on the morphodynamic evolution of the estuary. Two gravity cores were acquired and their magnetic properties, sediment size, chemical elements and Pb-210 geochronology were analyzed to infer the sedimentation. The results indicate that these sedimentological indexes, especially magnetic properties and trace elements, changed significantly during the last 100 years, with an abrupt change occurring at around 1960. This abrupt change is likely the result of a reduction in hydrodynamic energy caused by the narrowing of an upstream estuary reach due to reclamation. An increase of terrigenous input, due to soil erosion in the upper and middle reaches of the Changjiang, and increases in steel production may have also had a significant influence, as indicated by studies of other locations in the Changjiang drainage basin.

引用

页码：1671 / 1680

页数：10

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