img

Wechat

Adv search

Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (5): 18-30.DOI: 10.7522/j.issn.1000-694X.2023.00026

Previous Articles     Next Articles

Multi-model comparison on soil salinization inversion in Jingdian irrigation area of the Yellow River

Xiaofang Jiang1,3(), Qingxia Xu4, Hanchen Duan1,2, Jie Liao1,2, Pinglin Guo1,3, Cuihua Huang1,2, Xian Xue1,2()   

  1. 1.Key Laboratory of Desert and Desertification /, Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.Drylands Salinization Research Station, Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    3.University of Chinese Academy of Sciences,Beijing 100049,China
    4.Water Authority Bureau of Minqin County,Minqin 733300,Gansu,China
  • Received:2023-02-06 Revised:2023-03-22 Online:2023-09-20 Published:2023-09-27
  • Contact: Xian Xue

Abstract:

Located in the eastern part of the arid area of northwest China, Jingdian irrigation area is an important region covered by the second phase of the Jingtaichuan electric power irrigation project of the Yellow River. Irrational water resources utilization and poor drainage in the area led to the occurrence of secondary salinization in the area. In order to better monitor the soil salinization problem in Jingdian irrigation area and serve the national demand for salinization prevention and improvement of saline soil, this paper compares and analyzes the deep neural network (DNN), distributed random forest (DRF), and gradient boosting machine (GBM) from four aspects: model stability, noise problem, collinearity problem, and accuracy based on the measured hyperspectral reflectance and soil electrical conductivity on the land surface. The results show that: (1) There is a strong correlation between the measured hyperspectral reflectance data and the electric conductivity of soil samples, and the hyperspectral data provides convenience for soil salinity prediction research. (2) The DNN model has high stability, stronger ability to deal with noise and collinearity problems, and relatively high simulation accuracy, while the simulation results of DRF and GBM models are less different. The results show that the DNN model is more suitable for soil salinity prediction in Jingdian irrigation area, which provides a reference for soil salinization research in this area in terms of model applicability.

Key words: hyperspectral reflectance, DNN, DRF, GBM, salinization, Jingdian irrigation area

CLC Number: