Experimental and model research on the evaporation of loess-like sulfate saline soil considering the influence of initial salt content

Subjects: Agriculture, Forestry,Livestock & Aquatic Products Science >> Soil Science submitted time 2025-07-17 Cooperative journals: 《干旱区科学》

ZHANG Yabin CHOU Yaling ZHAO Dong WANG Lijie ZHANG Peng

Abstract： Intense evaporation in areas with loess-like sulfate saline soils has resulted in significant ecological
challenges that include water shortages and soil salinization. Investigating evaporation rate in loess-like
sulfate saline soils under varying salt contents carries crucial implications for understanding regional water
loss processes, predicting soil salinization advancement, and formulating effective ecological management
strategies. Therefore, this study sampled the loess-like sulfate saline soil that is widely distributed in western
China as experimental materials and investigated the impact of different initial salt contents (0.00%, 0.50%,
1.50%, 3.00%, and 5.00%) on the evaporation rate, water content, and temperature of soil. The results
showed that the evaporation rate decreased with increasing initial salt content. After a salt accumulation
layer formed on the soil surface, the water content of the surface soil fluctuated. An increase in the initial
salt content resulted in a corresponding increase in the surface temperature. Considering the evaporation
characteristics of loess-like sulfate saline soil and the impact of an anomalous increase in surface soil water
content on soil surface resistance, this study proposed a modified evaporation model on the basis of
Fujimaki’s evaporation model of saline soil by introducing a correction coefficient β to modify the soil
surface resistance. A comparison of the calculated evaporation rates before and after the modification with
the measured evaporation rates revealed a significant improvement in the calculation accuracy of the
modified model, indicating that the modified model is capable of more accurately simulating the evaporation
rate of sulfate saline soil with different initial salt contents. This paper proposes an effective method for
calculating the evaporation rate of loess-like sulfate saline soils, providing a theoretical basis for evaporation
research in saline soil.

YES

 Hits 13  Downloads 1  Comment 0