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Volume 8 Journal of Ecosystem & Ecography Biodiversity Congress 2018
July 26-27, 2018
July 26-27, 2018 Melbourne, Australia
7th International Conference on
Biodiversity Conservation and Ecosystem Management
Dramatic morphological changes caused by intensive coastal development: A case study in the
Longkou Bay, China
Dong Li, Cheng Tang, Xiyong Hou and Hua Zhang
Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, China
Tracing the evolution of subaqueous topography in coastal water enables us to understand the effects of intensive coastal
development on bays and estuaries. Analysis of a series of historical bathymetric acoustic surveys has revealed large changes in
morphology from 1960s to 2010s in Longkou Bay, China. Water depths were extracted from digitized admiralty charts to explore
the accretion-erosion characteristics in a geographical information system (GIS) environment, providing quantitative estimates of
morphological changes. Multi-Beam Echo-Sounders (MBES) were used to map and analyze the geomorphologic features caused
by the construction of artificial islands. Results illustrated that the shoreline and bathymetry of Longkou Bay changed dramatically
in recent decades. The subaqueous area decreased by about 15%, while land area increased by more than 13 km2 in the study area
during the last 50 years. From 1960s to 1990s, the evolution of Longkou Bay was mainly governed by natural processes with a patchy
distribution of deposition and erosion and there were few signs of being related to large-scale human activities. During the period
of 1990s to 2010s, intensive coastal developments including large port engineering projects, channel dredging and artificial islands
construction became the main processes affecting morphological changes in the Longkou Bay. The high-resolution bathymetric
results near the artificial island showed that the seafloor was dredged at many sites, leaving large areas of borrow pits. The sudden
change of the underwater topography will lead to the destruction of local benthic habitat and effective measures need to be taken to
protect and remediate heavily disturbed subaqueous environment.
Biography
Dong Li has his expertise in acoustic data processing and submarine sediment classification. He is familiar with basic knowledge and principle of acoustic seabed
detection, skillful in operating multi-beam equipment and post-processing software and able to explore data mining to solve some scientific issues. He devised a
technical approach to characterize, classify and map shallow coastal areas with artificial reefs using a multi-beam echo-sounder.
Dong Li et al, J Ecosyst Ecogr 2018, Volume 8
DOI: 10.4172/2157-7625-C4-041