Next Article in Journal
A Real-Time BOD Estimation Method in Wastewater Treatment Process Based on an Optimized Extreme Learning Machine
Next Article in Special Issue
An Improved Gradient Boosting Regression Tree Estimation Model for Soil Heavy Metal (Arsenic) Pollution Monitoring Using Hyperspectral Remote Sensing
Previous Article in Journal
Predicting the Extreme Loads in Power Production of Large Wind Turbines Using an Improved PSO Algorithm
Open AccessArticle

Seasonal and Intra-Annual Patterns of Sedimentary Evolution in Tidal Flats Impacted by Laver Cultivation along the Central Jiangsu Coast, China

by Wanyun Lu 1,2,3, Jiaqi Sun 1,2, Yongxue Liu 1,3,4,*, Yongchao Liu 1,2,3 and Bingxue Zhao 1,2,3
1
School of Geography and Ocean Science, Nanjing University, Nanjing 210023, Jiangsu Province, China
2
Key Laboratory of Coastal Zone Exploitation and Protection, Ministry of Natural Resources of China, Nanjing 210024, Jiangsu Province, China
3
Collaborative Innovation Center of South China Sea Studies, Nanjing University, Nanjing 210023, Jiangsu Province, China
4
Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Province, Nanjing 210023, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(3), 522; https://doi.org/10.3390/app9030522
Received: 22 October 2018 / Revised: 20 January 2019 / Accepted: 26 January 2019 / Published: 3 February 2019
(This article belongs to the Special Issue Remote Sensing and Health Problems)
Human activities such as the rapid development of marine aquaculture in the central Jiangsu coast have had a marked impact on the tidal flat morphology. This research focuses on characterizing the spatial expansion of laver cultivation and its influence on the sedimentary evolution of tidal flats in the central Jiangsu coast. First, seasonal digital elevation models (DEMs) were established using 160 satellite images with medium resolution. Then, laver aquaculture regions were extracted from 50 time-series satellite images to calculate the area and analyze the spatial distribution and expansion of these areas. Finally, seasonal and intra-annual sedimentary evolution patterns of both aquaculture and non-aquaculture regions were determined using the constructed DEMs. Our results show that aquaculture regions have gradually expanded to the north and peripheral domains of the entire sand ridge since 1999 and by 2013, the seaward margins of each sandbank developed into dense cultivation regions. Additionally, the aquaculture regions increased from 11.99 km2 to 295.28 km2. The seasonal sedimentary evolution patterns indicate that deposition occurs during the winter and erosion during the summer. Thus, the aquaculture regions experience deposition in certain elevation intervals during the laver growing period and in the non-growing period, alluvial elevation intervals in the aquaculture regions are eroded and erosive ones are deposited in order to maintain the balance between scouring and silting. The sedimentary evolution of each sandbank is heterogeneous due to their different locations and the difference in sediment transport. The intra-annual evolution pattern is characterized by deposition in the high tidal flats and erosion in low ones. Hydrodynamic conditions and laver cultivation dominate partial sedimentary evolution, which gradually shapes the beach surface. View Full-Text
Keywords: tidal flats; human activities; laver cultivation; spatial expansion; seasonal and intra-annual evolution patterns tidal flats; human activities; laver cultivation; spatial expansion; seasonal and intra-annual evolution patterns
Show Figures

Figure 1

MDPI and ACS Style

Lu, W.; Sun, J.; Liu, Y.; Liu, Y.; Zhao, B. Seasonal and Intra-Annual Patterns of Sedimentary Evolution in Tidal Flats Impacted by Laver Cultivation along the Central Jiangsu Coast, China. Appl. Sci. 2019, 9, 522.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop