Influence of Reclaimed Water Quality on Infiltration Characteristics of Typical Subtropical Zone Soils: A Case Study in South China

Irrigation with reclaimed water (RW) can alleviate scarcity and improve the environmental economic benefits. However, RW contains a large number of salts, suspended particles, organic matter, etc., which affect soil infiltration. Previous studies focused on examination this effect in alkaline soils, but infiltration change acidic soils has seldom been investigated. This study selects four typical types subtropical area south China designs experiments using different concentrations to examine influence various acid soils. The short-term impact is examined based one-dimensional horizontal method, long-term characteristics are measured by Mini Disk meter one year’s irrigation. Results show that irrigation restrain red while accelerating purple soil, aquic paddy soil. Regarding effect, cumulative increases decline concentration RW, there no unique trend for other After irrigation, physical properties such as particle size distribution, texture EC have changed. For increased significantly from 46.7 µS/cm 101.07 µS/cm. regarding decreased 157.05 123.20 Moreover, rate coefficient exhibits significant positive correlation (p < 0.01), silt content shows negative 0.01). Furthermore, parameters c S value correlated pH results reflected appropriate quality among types, will sustainable application RW. It shed insights into solving issue improving sustainability regions.