Contact us
[email protected] | |
3275638434 | |
Paper Publishing WeChat |
Useful Links
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Wenjin Zhu, Xue Li, Mei Zhang and Xiaotian Dong
Full-Text PDF XML 436 Views
DOI:10.17265/2162-5263/2022.05.005
Affiliation(s)
Jiangsu Ocean University, Lianyungang 222000, China
ABSTRACT
Taking
Yancheng Nature Reserve Salt Marsh as the research object, the remote sensing
images from 2005 to 2020 were interpreted by using remote sensing and
geographic information system technology. In this paper, the temporal and
spatial variation characteristics of erosion and deposition in the front edge
of salt marsh wetland were analyzed. The influence of sea level rise on the
annual change of salt marsh area was analyzed. The characteristics of flow and
sediment movement in salt marsh and the causes of erosion and deposition in
front of salt marsh were analyzed. The results showed that: (1) During 2005-2007, the
sea level was relatively low, and Spartina alterniflora in salt marsh expanded to the sea. Since 2007, the front edge of
salt marsh wetland has coexisted with erosion and deposition. From 2008 to
2010, the front edge of salt marsh wetland once again showed a trend of
comprehensive deposition to the sea side. From 2010 to 2012, the erosion of
salt marsh wetland was serious. From 2012 to 2020, the front edge of salt marsh wetland in the range of 9 km south of
Xinyang estuary was eroded. (2) The correlation analysis was carried out
between the area of salt marsh wetland and sea level rise. Spartina alterniflora is easily affected
by sea level change, owing to it having a low ecological niche. With the rise
of sea level, the area of salt marsh has been decreasing since 2013. (3) In the front sea area
of salt marsh wetland, the maximum velocity of the ebb and flood can reach the
threshold velocity during the spring tide. The sediment starts to move at water
depth of 10 m under wave actions. Owing to wave stirs up sediment and current
transports the sediment, resuspended sediment causes the erosion of marsh-edge
scarps.
KEYWORDS
Salt marsh wetland, remote sensing, deposition erosion, sea level rise, wave-current action.
Cite this paper
References