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Dynamic Mapping of Inland Freshwater Aquaculture Areas in Jianghan Plain, China
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of, 2023, Vol.16, p.4349-4361
2008-2012 IEEE ;DOI: 10.1109/JSTARS.2023.3269430
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Title:
Dynamic Mapping of Inland Freshwater Aquaculture Areas in Jianghan Plain, China
Author:
Han, Yifei
;
Huang, Jinliang
;
Ling, Feng
;
Qiu, Juan
;
Liu, Zhixuan
;
Li, Xiaodong
;
Chang, Cun
;
Chi, Hong
Subjects:
Aquaculture
;
Aquaculture classification
;
Ecology
;
Indexes
;
Jianghan plain
;
Laboratories
;
Lakes
;
recursive feature elimination (RFE)
;
Rivers
;
sentinel-1
;
sentinel-2
;
spatial change
;
Synthetic aperture radar
;
UNet
Is Part Of:
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of, 2023, Vol.16, p.4349-4361
Description:
Freshwater aquaculture in Jianghan Plain plays a key role in the whole industry of China. It was expanding rapidly to meet the fast-growing demand of consumption in these decades. The spatial distribution change of aquaculture in Jianghan Plain has attracted many researchers in recent years and it is worth further investigating. However, the accuracy and the quality of inland aquaculture classification and mapping still have space to be improved. Our study attempts to use Sentinel-1 and Sentinel-2 data to classify aquaculture areas, nonaquaculture water, and nonwater areas. We applied image segmentation and pixel-based feature computation to obtain candidate datasets. Recursive feature elimination (RFE) was used to find the optimal datasets which were then imported into a modified UNet for classification. This workflow was then applied to the annual datasets for better observation of the spatial change of aquaculture areas. In total, 12 indices and features were found most influential and preserved after RFE. The overall classification accuracy reached 96.83%, while the precision and recall of aquaculture areas reached 84.47% and 90.48%, respectively. The combination of object-based and pixel-based image analysis showed its advantage in inland aquaculture classification compared to other studies. Integrated rice-crawfish farming was found a key factor motivating the rapid development of aquaculture. Policies about the fishing ban and ecosystem restoration were also found deeply affecting the spatial change of aquaculture in Jianghan Plain.
Publisher:
IEEE
Language:
English
Identifier:
DOI: 10.1109/JSTARS.2023.3269430
Source:
IEEE Xplore Open Access Journals
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