大孔隙数量对土壤水和溶质运移影响研究
Journal: Hydropower and Water Resources DOI: 10.12238/hwr.v8i12.5897
Abstract
本论文通过开展室内扰动土大孔隙优势流试验,研究最基本的大孔隙结构因子,大孔隙直径、数量及其组合变化对土壤水分和溶质运移影响。通过试验获得了大孔隙土柱流速曲线、溶质穿透曲线、溶质穿透特征指标等结果。表明：土壤中大孔隙直径和数量越大,出流速率越大,初始穿透时间越早,初始穿透浓度越高,流速曲线因土壤非平衡结构均呈现出不同程度的波动性；因优势流通道的存在和溶质早期穿透现象,含大孔隙土柱溶质穿透曲线均呈现出双峰特征,不对称性和拖尾现象。
Keywords
优势流；人造大孔隙；大孔隙直径；大孔隙数量；溶质穿透曲线
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