An analysis of spatial-temporal coupling relationship between seawater intrusion and regional coastline changes in south coast of Laizhou Bay from 1979 to 2012
Yonghui MENG, Jining WANG, Lixia ZHANG, Mei LUO
Shandong Province Geological Environment Monitoring Station, Jinan 250014, China
Based on the regional seawater intrusion observation data and the remote sensing integrated observation data, the authors examined spatio-temporal dynamic change characteristics and mode of seawater intrusion and coastline evolution in the south coast zone of Laizhou Bay. Firstly, multi-period remote sensed images were used for monitoring of the regional coastline changes from 1979 to 2012. And then, the temporal and spatial features of seawater intrusion were reconstructed by digital vectorization from the historical filed survey maps. On the basis of above information, the EPR model was introduced and the spatial-temporal coupling mechanism between the seawater intrusion and coastline changes was studied and analyzed. Some conclusions have been reached: ① The regional seawater intrusion experienced a change process from rapid to slow, and the rate of invasion was slowing down after 1990. The front of intrusion line was stable since 1995 and retreated from 2008 to 2012. ② The coastal coastline is dominated by the coastal retreating coastline, besides the local artificial coastline. ③ There is a strong coupling relationship between the change of seawater intrusion frontline and coastline in time and space. The correlation coefficient is 0.407, at the significant level of P less than 0.01 (bilateral). The research results can provide data support and scientific basis for regional seawater intrusion prevention and control.
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Yonghui MENG, Jining WANG, Lixia ZHANG, Mei LUO. An analysis of spatial-temporal coupling relationship between seawater intrusion and regional coastline changes in south coast of Laizhou Bay from 1979 to 2012. Remote Sensing for Land & Resources, 2018, 30(3): 189-195.
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