2. Materials and methods
2.1. Evaporation experiment
The test site is located at the Environment and Ecological Restoration
Production and Research Base at Yangtze University in China (114.04°N,
30.53°E) (Fig. 1). It is situated in a subtropical humid monsoon climate
zone, with abundant rainfall and sunshine and four distinct seasons. The
mean annual air temperature, mean annual precipitation, and mean annual
evaporation are 16.9 °C, 1217 mm, and 934 mm, respectively. The
precipitation exhibits evident seasonality and is primarily concentrated
in June, July, and August. The soils in the surface layer of the test
area are not non-homogeneous, and the lithologies are all silty loam
soils with a water table depth of 1.9-2.8 m.