Salt-Water Dynamics in Highly Salinized Topsoil of Salt-Affected Soil During Water Infiltration

Continuous monitoring of salt and water movement in the soil profile of highly salinized topsoil under steady-state infiltration was conducted. It gives that salt and water dynamics during convection-diffusion period can be divided into three stages: 1. formation of a salt peak, 2. the salt peak moving downwards till the appearance of the summit of the salt peak, 3. the salt peak moving further downwards with the peak value decreasing. Results show that the maximum salt peak appears at the same depth if soil texture and outflow condition are the same. Factors affecting salt and water movement and ion components in the outflow solution under infiltration are discussed.