蓄水条件下蓄水沟水体与相邻土壤的盐分运移规律研究

在盐碱地治理“改排为蓄，水地共处，和谐生态”的卤泊滩模式中，通过调整蓄水沟水位高低和含盐浓度的动态变化，使土壤中盐分扩散运移，循环加速压盐，改变土壤盐分在垂直方向上的分布，从而实现对盐碱地的治理。本文通过试验和数值模拟的办法对这一新的机理给予研究。在蓄水条件下，对水体与土壤相邻体进行室内试验观测盐分扩散及平衡规律；针对研究对象，建立盐分运动数学模型，并进行模拟计算。分析了蓄水水位高、水中盐分浓度小情况下，土壤中盐分快速扩散到水体中，以及蓄水水位低、水中盐分浓度高情况下，水体中盐分快速扩散到土壤中的运移规律

Transport of salt between water and adjacent soil in canals of farmland under the condition of storage

Experiment and numerical simulation were carried out to study the transport of salt between water and adjacent soil in canals for investigating the mechanism of the new method for saline treatment suggested by the authors, which utilizing the dynamic variation of stored groundwater level in canals and lowlands to control the saline in soil. The diffusion and balance processes of salt were observed in experiments and the mathematical model describing the movement of salt was established. It is found that the salt quickly diffuses to the water in canal at high water level when the saline concentration in water is low. Whereas, when the water level in canal is low and saline concentration in water is high the salt in water will move to soil quickly. The numerical simulation result agrees with experimental result.