Research on Structural Deterioration and Water-Salt Migration Model of Salinized Loess Under Dry-Wet Cycles

Agricultural irrigation in arid loess regions raises groundwater levels and promotes salt accumulation. Dry-wet cycles further exacerbate surface salt accumulation, resulting in soil salinization that poses a significant threat to cropland quality and infrastructure safety.This study used artificially salinized loess to conduct soil column tests under different dry-wet cycles and salinity conditions. It analyzed evaporation characteristics, water-salt migration, and structural degradation mechanisms.干旱黄土区的农业灌溉会抬升地下水位，进而促进盐分积聚。干湿循环会进一步加剧地表盐分累积，最终引发土壤盐渍化，对农田质量与基础设施安全构成严重威胁。本研究采用人工盐渍化黄土，在不同干湿循环与盐分条件下开展土柱试验，分析了蒸发特征、水盐运移规律及土壤结构退化机制。