Author(s): Penghe Wang; Weiwei Wu

Linked Author(s):

Keywords: Leaching desalination; Soil tillage; Topsoil desalination; Soil salt control; Chlorine ion release

Abstract: In response to the risk of water salinization in newly built reservoirs in coastal areas, the control of soil salt release in slope areas is crucial. The results of the indoor simulation study show that the continuous leaching takes the shortest time to reach the target salinity, and the desalination efficiency is higher than that of intermittent leaching. The water consumption per unit area of continuous leaching that meets the desalination standard is about 5t/m2, which takes about 100 days. The results of in-situ experiments indicate that the water consumption per unit area of continuous leaching that meets the desalination standard is about 7.8~8.5t/m2, taking about 60 days. It is also better than intermittent leaching combined with tillage treatment, which consumes about 6.3t/m2 of water and takes about 90 days. Overall, the efficiency of leaching desalination gradually decreases with the desalination process, and the soil salinity was basically stable at 2.5~3.5g/kg in the later period. In summary, the leaching desalination method can achieve rapid desalination of high saline soil, and in general, continuous leaching is recommended to achieve a shorter construction period under controllable water use efficiency. Furthermore, there is a relatively economical and reasonable salinity target value that is restricted by soil, water, meteorology and other factors in the engineering area in this method.

DOI: https://doi.org/10.64697/978-90-835589-7-4_41WC-P1549-cd

Year: 2025