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Experiment and simulation of groundwater salt transport based on different contact relations in heterogeneous soil layers
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  • Xiaohui Lu,
  • Yushu Hu,
  • Ziyang Yang,
  • Abdou Raouf,
  • Mengen Song,
  • Lei Wang
Xiaohui Lu
Hohai University
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Yushu Hu
Hohai University
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Ziyang Yang
Hohai University
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Abdou Raouf
Hohai University
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Mengen Song
Hohai University

Corresponding Author:[email protected]

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Lei Wang
Hohai University
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Abstract

With the expansion of reserve cultivated land resources in coastal saline-alkali areas, the problem of soil salinization is becoming more and more prominent. In order to reveal the influence of soil media on soil water movement, it is necessary to establish a good hydrological model. In order to evaluate the performance of the two-domain Hydrus-3D model in heterogeneous soil layer, the characteristics of water, salt and wet-peak transport of surface soil and sand in the study area were analyzed under horizontal contact and inclined contact. The measured data show that the water in the surface soil gradually increases and then stabilizes, and the water in the sand soil is similar to the normal curve. The salt characteristics in the surface soil are similar to the normal curve, while the salt characteristics in the sandy soil gradually increase and then stabilize. This is consistent with the simulation data. The results showed that the Hydrus-3D model had a good simulation effect on the groundwater salt transport of heterogeneous soil under two contact methods. The RMSE value and E value are close to 0 and 1 respectivelywhich indicates that it has good feasibility.