干旱地区农业研究2018，Vol.36Issue(3)：258-265,8.DOI:10.7606/j.issn.1000-7601.2018.03.38
基于高光谱与电磁感应技术的干旱区绿洲土壤含水量反演研究
Inversion of soil moisture content in the oasis of arid areas using hyperspectral and electromagnetic induction instruments
摘要
Abstract
In order to realize rapid and accurate monitoring soil moisture content in the oasis arid areas,84 soil samples from top soil(0～10cm)were collected from Weigan-Kuche oasis.Based on sensitive feature spectrum parameters selected by the spectral correlation with soil moisture content that measured by visible-near-infrared(VNIR)spectroscopy.The interpretation data by using the electromagnetic conduction(EM38)replaced the soil moisture content and the spectral reflectance of hyper spectral bands fit by simulation Landsat8 satellite remote sens-ing spectral reflectance as soil spectral reflectance.Models were established and the soil moisture content in the oa-sis arid areas of Weigan and Kuqa Rivers was estimated by using partial least squares(PLSR)analysis.The results showed following.(1)Soil apparent conductivity of EM38 level pattern had high correlation with soil moisture con-tent and ECHcould be used as a surrogate for moisture content.(2)The optimal estimation model was variety of spectral characteristic index.The determination coefficient R2in dry and wet seasons were greater than 0.7,the root mean square error(RMSE)was less than 0.5％and RPD was greater than 2,this model can be used as effective method to estimate soil water moisture of oasis in arid areas.(3)The correlation with soil moisture content of re-mote sensing inversion and laboratory measured was high,their determination coefficients R2were greater than 0.6,the root mean square error(RMSE)was less than 0.6％.It would be a precise and efficient method to monitor the soil moisture content in the oasis arid areas by combining with electromagnetic induction technology and hyperspectral.关键词
土壤含水量/高光谱/电磁感应仪/估算模型/干旱区绿洲Key words
soil moisture content/hyperspectral/electromagnetic induction instrument/estimation model/oa-ses of arid area分类
农业科技引用本文复制引用
宁娟,丁建丽,杨爱霞,苏雯,李焕,曹雷,缪琛,地力夏提·艾木热拉..基于高光谱与电磁感应技术的干旱区绿洲土壤含水量反演研究[J].干旱地区农业研究,2018,36(3):258-265,8.基金项目
国家自然科学基金项目(U1303381,41261090,41161063) （U1303381,41261090,41161063）
新疆维吾尔自治区科技支疆项目(201591101) （201591101）
新疆维吾尔自治区自治区重点实验室专项基金(2016D03001,2014KL005). （2016D03001,2014KL005）
