干旱区生态环境知识资源中心(Arid): Soil salinity analysis of Urmia Lake Basin using Landsat-8 OLI and Sentinel-2A based spectral indices and electrical conductivity measurements

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DOI	10.1016/j.ecolind.2020.106173
	Soil salinity analysis of Urmia Lake Basin using Landsat-8 OLI and Sentinel-2A based spectral indices and electrical conductivity measurements
	Gorji, Taha 1; Yildirim, Aylin 2; Hamzehpour, Nikou 3; Tanik, Aysegul 4; Sertel, Elif 5
通讯作者	Sertel, Elif
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2020
卷号	112
英文摘要	Soil salinization is one of the significant soil degradation problems especially faced in arid and semi-arid regions of the world. It poses a high threat to soil productivity in agricultural lands. The demand for economic and rapid detection and temporal monitoring of soil salinity has been rising recently. Satellite imagery and remote sensing approaches are the significant tools for accurate prediction and mapping of soil salinity in various regions of the world. This study aims to compare Landsat- 8 OLI and Sentinel-2A derived soil salinity maps of the western part of Urmia Lake in Iran by applying three different salinity indices in conjunction with field measurements. Totally 70 soil samples were collected from top 20 cm of surface soil in October 2016 from an area of 18 km 2 . Landsat-8 OLI and Sentinel-2A images were acquired in the same month; both images were atmospherically and radiometrically corrected prior to applying soil salinity indices. After comparing Normalized Difference Vegetation Index (NDVI) value of corresponding pixel for each sample with its electrical conductivity (EC) value, 54 soil samples with various EC ranges were selected for mapping. Among them, 42 samples were used for establishing the regression model and remaining 12 samples were utilized to validate the model. Multiple and linear regression analyses were conducted to correlate the EC data with their corresponding soil salinity spectral index values derived from visible bands of satellite images. The results revealed that soil salinity indices extracted from both Landsat-8 OLI and Sentinel-2A visible bands estimated soil salinity with acceptable accuracy of R-2 0.73 and 0.74, respectively. Multiple linear regression analysis using both Landsat- 8 OLI and Sentinel-2A data demonstrated higher accuracy with R-2 value of 0.77 and 0.75, respectively, compared to linear regression. This study proves that various soil salinity classes with different EC ranges can be estimated by correlating ground measurement data with satellite data.
英文关键词	Soil salinity Electrical conductivity data Landsat-8 OLI Sentinel-2A Urmia basin Soil salinity indices
类型	Article
语种	英语
国家	Turkey ; Iran
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000518385800079
WOS关键词	ETM PLUS ; COUNTY ; CHINA
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314362
作者单位	1.ITU, Informat Inst, Geog Informat Technol Program, TR-34469 Istanbul, Turkey; 2.ITU, Informat Inst, Satellite Commun & Remote Sensing Program, TR-34469 Istanbul, Turkey; 3.Univ Maragheh, Fac Agr, Dept Soil Sci & Engn, Maragheh, Iran; 4.ITU, Fac Civil Engn, Dept Environm Engn, TR-34469 Istanbul, Turkey; 5.ITU, Fac Civil Engn, Dept Geomat Engn, TR-34469 Istanbul, Turkey
推荐引用方式 GB/T 7714	Gorji, Taha,Yildirim, Aylin,Hamzehpour, Nikou,et al. Soil salinity analysis of Urmia Lake Basin using Landsat-8 OLI and Sentinel-2A based spectral indices and electrical conductivity measurements[J],2020,112.
APA	Gorji, Taha,Yildirim, Aylin,Hamzehpour, Nikou,Tanik, Aysegul,&Sertel, Elif.(2020).Soil salinity analysis of Urmia Lake Basin using Landsat-8 OLI and Sentinel-2A based spectral indices and electrical conductivity measurements.ECOLOGICAL INDICATORS,112.
MLA	Gorji, Taha,et al."Soil salinity analysis of Urmia Lake Basin using Landsat-8 OLI and Sentinel-2A based spectral indices and electrical conductivity measurements".ECOLOGICAL INDICATORS 112(2020).