Evapotranspiration on Natural and Reclaimed Coral Islands in the South China Sea

doi:10.3390/rs13061110

	Evapotranspiration on Natural and Reclaimed Coral Islands in the South China Sea
	Han, Shengsheng 1,2; Liu, Suxia 1,2; Hu, Shi 1; Song, Xianfang 1,2; Mo, Xingguo 1,2
刊名	REMOTE SENSING
	2021-02-01
卷号	13 期号:6 页码:18
关键词	evapotranspiration coral islands water balance VIP-RS model
DOI	10.3390/rs13061110
通讯作者	Liu, Suxia(liusx@igsnrr.ac.cn)
英文摘要	Studies of evapotranspiration on remote tropical coral islands are important to explore and sustain scarce freshwater resources. However, there is a significant knowledge gap between research to evaluate evapotranspiration based on remote sensing methods and the influences of different land use types on water dynamics on reclaimed coral islands. This study applied the remote-sensing-based Vegetation Interfaces Processes (VIP-RS) model to estimate actual evapotranspiration (ETa) on Zhaoshu Island, Yongxing Island, and Yongshu Island in the South China Sea from 2016 to 2019. The results showed that the average annual ETa of Zhaoshu Island, Yongxing Island, and Yongshu Island was 685 mm, 530 mm, and 210 mm, respectively. Annual transpiration (E-c) and soil evaporation (E-s) exhibited similar patterns on the natural islands; however, E-s controlled the water consumption on the reclaimed islands. Water dynamics exhibited seasonal fluctuations due to the uneven distribution of precipitation (PRP). However, ETa of the natural islands was higher than PRP in the dry season, indicating vegetation has to absorb water from the groundwater to sustain growth. The results also agreed with the analysis of dominant driving factors based on partial correlation analysis, which demonstrated that the Normalized Difference Vegetation Index (NDVI) is the most important factor that influences ETa, while relative humidity (RH) controlled the bare land or sparsely vegetated areas on the reclaimed islands. The setting of different land use types showed that vegetation and built-up or hardened roads took control of evapotranspiration and rainwater collection, respectively, which play important roles in water dynamics on corals islands. The evaluation of ETa based on a remote-sensing-based model overcame the difficulty in fieldwork observation, which improves the certainty and accuracy at a spatial scale. In addition, it gave us a new reference to protect and manage scarce freshwater resources properly.
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDA13010303]
WOS关键词	FRESH-WATER LENSES ; ATOLL ISLANDS ; CLIMATE ; MANAGEMENT ; EVAPORATION ; VEGETATION ; PACIFIC ; WHEAT ; HYDROGEOLOGY ; CONDUCTANCE
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
语种	英语
出版者	MDPI
WOS记录号	WOS:000651946400001
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/162760]
专题	中国科学院地理科学与资源研究所
通讯作者	Liu, Suxia
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Sino Danish Ctr, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Han, Shengsheng,Liu, Suxia,Hu, Shi,et al. Evapotranspiration on Natural and Reclaimed Coral Islands in the South China Sea[J]. REMOTE SENSING,2021,13(6):18.
APA	Han, Shengsheng,Liu, Suxia,Hu, Shi,Song, Xianfang,&Mo, Xingguo.(2021).Evapotranspiration on Natural and Reclaimed Coral Islands in the South China Sea.REMOTE SENSING,13(6),18.
MLA	Han, Shengsheng,et al."Evapotranspiration on Natural and Reclaimed Coral Islands in the South China Sea".REMOTE SENSING 13.6(2021):18.