Analysis of Ningyuan Estuary coastline transition based on the multi-resource remote sensing image
Kun LUO1, Bo DING2,3(), Genyuan LONG1
1. Marine Geological Survey Institute of Hainan Province, Haikou 570206, China 2. School of Earth Science, China University of Geosciences(Wuhan), Wuhan 430074, China 3. Hainan Comprehensive Design Institute of Geological Survey, Haikou 570206, China
In this paper, by utilizing 4 phases of multi-resource remote sensing images in 1987, 2000, 2010 and 2015, the authors carried out the information extraction of coastline in Ningyuan Estuary in 4 phases from 1987 to 2015,and analyzed spatial and temporal characteristics,influencing factors and development trend of coastline transition by using the density segmentation and binarization processing based on object-oriented information extraction technology. Some conclusions have been reached: The coastline of Ningyuan Estuary overall showed a trend of growth from 1987 to 2015, with the total length increasing up to 8.14 km. The ecological environment of the coastal zone in Ningyuan Estuary has changed greatly with the disappearance of mangrove resources near the estuary largely, the expansion of artificial breeding zones and the continuous deterioration of water quality. The overall feature in the delta of Ningyuan Estuary is siltation, and that in the west of the estuary is erosion. The major influencing factors include coastal erosion and siltation, artificial breeding in the tideland and the construction of the artificial island as well as the building of a dam for sand control. The situation of Ningyuan Estuary is not optimistic in recent years. The erosion of the artificial island’s west coastline tends to become worse and the coastal siltation will be further intensified in the east of the sand-protecting dam.
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Kun LUO, Bo DING, Genyuan LONG. Analysis of Ningyuan Estuary coastline transition based on the multi-resource remote sensing image. Remote Sensing for Land & Resources, 2018, 30(4): 187-192.
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2018, Vol. 30 
), 龙根元1
