Study of the Interpretation of Inverted Soil Salinity Profile Characteristics by Using Electromagnetic Induction
详细信息
- 责任者：Yang Jingsong (Institute of Soil Science ; Chinese Academy of Sciences ; Nanjing 210008 ; China) ; Yao Rongjiang
- 刊名：Hydrogeology and Engineering Geology
- 出版年：2007
- 卷期：34(5)
- 关键词：土壤盐渍化 ; salinization
- 页码：p.67-72
- 图表：2 illus., 3 tables, 13 refs.
- 分类号：1800
- issnNo：ISSN1000-3665
- isbnNo：CN11-2202/P
摘要
Taking into account the problem of soil salinization existing in the Yellow River Delta at present, (multiple) linear regression models between apparent electrical conductivity and soil salinity were established with the application of electromagnetic induction EM38 on the inverted salinity profiles extensively distributed in the study area. Based on the analyses of soil salinity profile characteristics, exponential decay models were propounded and fitted for all calibration salinity profiles, and the obtained exponential decay models were then used to test the validation salinity profiles. Results show that apparent electrical conductivity EMh is linearly correlated with Emv significantly, and the variation in soil salinity in the vertical direction mainly exhibits at soil surface layer of less than 25 cm in depth. The research results can serve as a theoretical and practical reference to the rapid determination of soil salinity and the accurate interpretation of salinity distribution profiles by using electromagnetic induction.