1. College of Resources and Environment Science, Xinjiang University, Urumqi 830046, China 2. Key Laboratory of Oasis Ecology under Ministry of Education, Xinjiang University, Urumqi 830046, China
The purpose of this paper is to improve the precision of salinity monitoring model with Landsat8 OLI multi-spectral images in the oasis of arid area. In this paper, the authors chose the Ebinur Lake region as the study area, and reflectivity of saline soil based on OLI image and spectral reflectivity from resampled ASD data were measured respectively. According to the findings of the correlation analysis of twelve transforms of soil spectral reflectance with soil salt content, multiple stepwise regression analysis algorithm was used. Based on the analysis, the authors chose the most sensitive band ranges to establish a soil salinization monitoring model using the ASD actual measurement data and corrected OLI image inversion of soil salinity. The results show that the soil salt content inversion model based on the measured field spectral is satisfying, the first-order of the logarithm of the reciprocal with the best accuracy and the R2 is 0.779. Spectral reflectivity after resampling data performed better than those monitoring models with OLI spectral data, the coefficient of determination (R2) is raised from 0.28 to 0.777 6, and the RMSE is 0.281. The authors realized the scale transformation of the soil salt content spectral inversion model from field measurements of spectral scales to spectral scale of multi-spectral remote sensing, and the results could provide a theoretical reference for further improvement of the accuracy of quantitative remote sensing monitoring of soil salt content at the regional scale.
Ding J L,Yao Y,Wang F.Detecting soil salinization in arid regions using spectral feature space derived from remote sensing data[J].Acta Ecologica Sinica,2014,34(16):4620-4631.
Tian C Y,Zhou H F,Liu G Q.The proposal on control of soil salinizing and agricultural sustaining developmentn in 21’s century in Xinjiang[J].Arid Land Geography,2000,23(2):177-181.
Weng Y L,Qi H P,Fang H B,et al.PLSR-based hyperspectral remote sensing retrieval of soil salinity of Chaka-Gonghe basin in Qinghai Province[J].Acta Pedologica Sinica,2010,47(6):1255-1263.
Cao L,Ding J L,Umut H,et al.Extraction and modeling of regional soil salinization based on data from GF-1 satellite[J].Acta Pedologica Sinica,2016,53(6):1399-1409.
[11]
Dehaan R L,Taylor G R.Field-derived spectra of salinized soils and vegetation as indicators of irrigation-induced soil salinization[J].Remote Sensing of Environment,2002,80(3):406-417.
[12]
Farifteh J,Van der Meer F,Atzberger C,et al.Quantitative analysis of salt-affected soil reflectance spectra:A comparison of two adaptive methods(PLSR and ANN)[J].Remote Sensing of Environment,2007,110(1):59-78.
Kelimu A,Tiyip T,Zhang D,et al.Calibration and validation of soil salinity estimation model based on measured hyperspectral and ASTER image[J].Transactions of the Chinese Society of Agricultural Engineering,2016,32(12):144-150.
Yao Y,Ding J L,Kelimu A,et al.Research on remote sensing monitoring of soil salinization based on measured hyperspectral and EM38 data[J].Spectroscopy and Spectral Analysis,2013,33(7):1917-1921.
Lei L,Tiyip T,Ding J L,et al.Soil salinization information extraction by using hyperspectral data of HJ-1A HSI:A case study in the oasis of Ugan & Kuqa,Xinjiang,China[J].Journal of Desert Research,2013,33(4):1104-1109.
[16]
伍漫春. 绿洲区域尺度水盐遥感研究——以渭干河库车河绿洲为例[D].乌鲁木齐:新疆大学,2011.
Wu M C.Research on the water-salt of the Oasia at the regional scale by remote sensing[D].Urumchi:Xinjiang University,2011.
Wu J L,Liu J J,Wang S M,et al.Climatic change record from stable isotopes in lake Aibi,Xinjiang during the past 1500 years[J].Quaternary Sciences,2004,24(5):585-590.
He X M,Lü G H,Qin L,et al.Research on data characteristics during non-growing season of desert wetland ecosystem in Ebinur lake[J].Acta Ecologica Sinica,2014,34(22):6655-6665.
Ran Q X,Lü G H,Wei X F,et al.Enzyme activities and physicochemical properties of soils in the Ebinur lake nature reserve in Xinjiang,China[J].Arid Zone Research,2014,31(4):715-722.
Zhao S Y,Wang W K.Research on hydrogeological condition of Aibi lake valley Tipical plant growth[J].Environmental Protection of Xinjiang,2005,15(1):13-17.
Li H,Lin Q Z,Wang Q J,et al.Research on spectrum denoising methods based on the combination of wavelet package transformation and mathematical morphology[J].Spectroscopy and Spectral Analysis,2010,30(3):644-648.
[22]
Palacios-Orueta A,Ustin S L.Multivariate statistical classification of soil spectra[J].Remote Sensing of Environment,1996,57(2):108-118.
[23]
Kan N M,Sato Y.Monitoring hydro-salinity status and its impact in irrigated semi arid areas using IRS-1B LISS-Ⅱ data[J].Asian Journal of Geoinform,2001,1(3):63-73.
Li X,Ding J L.Soil moisture monitoring based on measured hyperspectral index and HSI image index[J].Transactions of the Chinese Society of Agricultural Engineering,2015,31(19):68-75.
2018, Vol. 30 
), 塔西甫拉提·特依拜2(
