Evolution of tidal flat in the bar area of the Yangtze Estuary and their driving factors

Chen Yong; He Zhongfa; Li Bing; Yang Lijun; Zhang Jinhua

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Chen Yong, He Zhongfa, Li Bing, Yang Lijun, Zhang Jinhua. Evolution of tidal flat in the bar area of the Yangtze Estuary and their driving factors[J]. Haiyang Xuebao, 2015, 37(9): 95-105.

Citation:

Chen Yong, He Zhongfa, Li Bing, Yang Lijun, Zhang Jinhua. Evolution of tidal flat in the bar area of the Yangtze Estuary and their driving factors[J]. Haiyang Xuebao, 2015, 37(9): 95-105.

Chen Yong, He Zhongfa, Li Bing, Yang Lijun, Zhang Jinhua. Evolution of tidal flat in the bar area of the Yangtze Estuary and their driving factors[J]. Haiyang Xuebao, 2015, 37(9): 95-105.

Citation:

Chen Yong, He Zhongfa, Li Bing, Yang Lijun, Zhang Jinhua. Evolution of tidal flat in the bar area of the Yangtze Estuary and their driving factors[J]. Haiyang Xuebao, 2015, 37(9): 95-105.

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Evolution of tidal flat in the bar area of the Yangtze Estuary and their driving factors

Shanghai Institute of Geological Survey, Shanghai 200072, China

Received Date: 2014-06-19
Rev Recd Date: 2015-01-16

Abstract

Abstract

Bathymetric data surveyed from 1958 to 2013 were analyzed using ArcGIS and DSAS software to investigate the evolution of the tidal flats in the bar area of the Yangtze Estuary. And driving factors such as the declined riverine sediment supply and the major engineering works constructed in the Yangtze Estuary were discussed in this study. The results demonstrated that: (1) the amount of tidal flat resources has experienced slight decrease since 1958; but it comes to be stable, with amount of 2 350 km² in recent decade. (2) the area deeper than 5 m has begun to experience erosion since 1997, and the averaged vertical erosion rate was 7.3 cm/a. (3) the dramatic sediment decline from Yangtze River in recent decade has brought negative impact on the progradation of the tidal flat deeper than 0 m. Nevertheless, the area shallower than 0 m was continued to accretion due to the influence of the engineering works in the estuary.
- tidal flat resources,
- engineering works in the estuary,
- sediment decrease,
- Yangtze Estuary,
- Shanghai

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References(22)

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