干旱区生态环境知识资源中心(Arid): Soil Moisture Influence on the FTIR Spectrum of Salt-Affected Soils

Arid

DOI	10.3390/rs14102380
	Soil Moisture Influence on the FTIR Spectrum of Salt-Affected Soils
	Le Thi Thu Hien; Gobin, Anne; Duong Thi Lim; Dang Tran Quan; Nguyen Thi Hue; Nguyen Ngoc Thang; Nguyen Thanh Binh; Vu Thi Kim Dung; Pham Ha Linh
通讯作者	Gobin, A
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2022
卷号	14 期号:10
英文摘要	Soil salinity has a major impact on agricultural production. In a changing climate with rising sea-levels, low-lying coastal areas are increasingly inundated whereby saltwater gradually contaminates the soil. Drought prone areas may suffer from salinity due to high evapotranspiration rates in combination with the use of saline irrigation water. Salinity is difficult to monitor because soil moisture affects the soil's spectral signature. We conducted Fourier-transform infrared spectroscopy on alluvial and sandy soil samples in the coastal estuary of the Red River Delta. The soils are contaminated with NaCl, Na2CO3 and Na2SO4 salts. In an experiment of salt contamination, we established that three ranges of the spectrum were strongly influenced by both salt and moisture content in the soil, at wavenumbers 3200-3400 cm(-1) (2.9-3.1 mu m); 1600-1700 cm(-1) (5.9-6.3 mu m); 900-1100 cm(-1) (9.1-11.1 mu m). The Na2CO3 contaminated soil and the spectral value had a linear relationship between wavelengths 6.9 and 7.4 mu m. At wavelength 6.99 mu m, there was no relationship between absorbance and soil moisture, but the absorbance was proportional to the salt content (R-2 = 0.85; RMSE = 0.68 g) and electrical conductivity (R-2 = 0.50; RMSE = 3.8 dS/m). The relationship between soil moisture and spectral absorbance value was high at wavelengths below 6.7 mu m, resulting in a quadratic relation between soil moisture and absorbance at wavelength 6.13 mu m (R-2 = 0.80; RMSE = 5.2%). The spectral signatures and equations might be useful for mapping salt-affected soils, particularly in difficult to access locations. Technological advances in thermal satellite sensors may offer possibilities for monitoring soil salinity.
英文关键词	soil salinity Fourier-transform infrared spectroscopy FTIR Vietnam
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000803182500001
WOS关键词	SALINITY ; REFLECTANCE ; DESERTIFICATION ; INDICATORS ; TOLERANCE ; PROVINCE ; PLANTS
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394146
推荐引用方式 GB/T 7714	Le Thi Thu Hien,Gobin, Anne,Duong Thi Lim,et al. Soil Moisture Influence on the FTIR Spectrum of Salt-Affected Soils[J],2022,14(10).
APA	Le Thi Thu Hien.,Gobin, Anne.,Duong Thi Lim.,Dang Tran Quan.,Nguyen Thi Hue.,...&Pham Ha Linh.(2022).Soil Moisture Influence on the FTIR Spectrum of Salt-Affected Soils.REMOTE SENSING,14(10).
MLA	Le Thi Thu Hien,et al."Soil Moisture Influence on the FTIR Spectrum of Salt-Affected Soils".REMOTE SENSING 14.10(2022).