Author(s): Wang Penghe; Wu Weiwei
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 tillage treatment can improve the desalination efficiency of the intermittent leaching, and continuous leaching can take less time than intermittent leaching under indoor conditions. 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 0.25% ~0.35% 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.
Year: 2025