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Current status and formational mechanisms of coastal erosion on typical islands in China

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Title Current status and formational mechanisms of coastal erosion on typical islands in China
 
Creator Gao, W
Li, P
Liu, J
Xu, Y Q
Liu, L J
 
Subject Coastal erosion
Human activities
Islands
Sea-level rise
Storm tide
 
Description 825-837
A geological hazard survey of 82 islands in coastal China from 2010 to 2012, and subsequent periodic monitoring of
coastal erosion on 10 representative islands from 2012 to 2014, found 138 coastal erosion points on 39 islands. Coastal
erosion was a typical pattern of the coastal geological hazards, with the most serious impacts occurring on the southeastern
coast of Chongming Island, the maximum erosion rate was 18.3 m/a under the conditions of sediment reduction and drastic
hydrodynamic changes of the Yangtze river. The primary causes were changes in river dynamics, the marine hydrodynamic
environment, and human activities, the specific factors included sea-level rise, river diversion, river-borne sediment
reduction, wind-driven waves, storm tides, construction, coastal degradation, beach drainage, and sand mining. Natural and
human factors accounted for 57 and 43 % of coastal erosion effects, respectively. Sea-level rise operated on a long-time
scale, causing an annual mean shoreline retreat of 0.15 – 0.30 m, although such changes were not obvious over short time
scales, they were significant at the decennial and centennial scale. Storm tides were among the most important factors
operating over shorter time scales, although increasing human development of islands is rapidly becoming a significant
cause of coastal erosion.
 
Date 2022-03-03T04:34:50Z
2022-03-03T04:34:50Z
2021-10
 
Type Article
 
Identifier 2582-6727 (Online); 2582-6506 (Print)
http://nopr.niscair.res.in/handle/123456789/59255
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJMS Vol.50(10) [October 2021]