Monitoring soil salinization in Manas River Basin, Northwestern China based on multi-spectral index group
| Autor: | Jianghui Song, Xin Lv, Wang Haijiang, Xiaoyan Shi |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Hydrology
Atmospheric Science Agricultural irrigation geography model Soil salinity Agricultural development Index (economics) geography.geographical_feature_category soil salinization Applied Mathematics lcsh:QE1-996.5 Drainage basin Multi spectral lcsh:Geology lcsh:Oceanography data transformation Soil retrogression and degradation soil salinity monitoring Environmental science lcsh:GC1-1581 Computers in Earth Sciences China spectral index group General Environmental Science |
| Zdroj: | European Journal of Remote Sensing, Vol 0, Iss 0, Pp 1-13 (2020) |
| ISSN: | 2279-7254 |
| DOI: | 10.1080/22797254.2020.1762247 |
| Popis: | Large-scale and accurate monitoring soil salinization is essential for controlling soil degradation and sustainable agricultural development. The agricultural irrigation area of the Manas River Basin in the arid area of Northwest China was selected as the test area. The soil salinization monitoring model based on spectral index group was constructed by comparing the accuracy of PCR, PLSR and MLR models using the transformation of multi-spectral index group and index screening. The results showed that there was a certain correlation between the 28 spectral index groups, with a maximum correlation coefficient -0.3689 between the original spectral group and the soil salt content was B10 band. After the transformation of original data for the logarithm Ln(R), exponential eR and square root R1/2 respectively, the correlation between each index and soil salinity was significantly improved, with the maximum correlation coefficient was up to -0.7564 of R1/2. The salt content estimation models were constructed by different data transformation using PLSR, PCR and MLR methods, respectively. This study provides a fast and accurate method for monitoring regional soil salinity content and the results can provide a reference for soil salinity grading management in arid and semi-arid areas. |
| Databáze: | OpenAIRE |
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