为研究土壤容重以及供水水质对土壤水分垂直入渗性能的影响，以香山地区不同容重（1.351.45 g/cm3）的土壤为研究对象，通过室内土柱一维垂直入渗试验，选择供水水质为影响因子，设置4种不同电导率的供水水质（02.55.07.5 mS/cm）对土壤入渗时间入渗率，盐分分布特征以及含水率分布特征进行研究，并用PhilipKostiakov和通用经验模型来模拟土壤水分入渗过程。结果表明：微咸水入渗可以增大两种土壤的入渗性能，对土壤容重为1.35 g/cm3的土壤影响更为明显，利用Kostiakov入渗方程能更好地拟合不同容重的土壤水分的入渗过程，且模型对土壤容重为1.45 g/cm3的土壤入渗过程的拟合精度更高。土壤含水率与盐分再分布的过程中，在土壤上层，电导率为0 mS/cm入渗条件下，两种容重土壤的土层的含盐量均小于土壤初始含盐量，说明其在不同程度上可以淋洗盐分，在供水水质电导率为2.55.07.5 mS/cm条件下，两种容重土壤的土柱剖面均出现明显积盐的情况；在4种供水水质的入渗条件下，在土壤上层，两种容重的土壤含水率均出现急剧下降的趋势，这是由于随着电导率的增加，土壤的导水性能随之增加，但是在同一深度，土壤容重为1.35 g/cm3的土壤含水率略高于压砂地土壤容重为1.45 g/cm3的土壤含水率，这是由于在一定的范围内，随着土壤容重的增加导致土壤孔隙率的减小，水分的运动过程受到阻碍，进而影响到土壤的含水率。

In order to study the influence of soil bulk density and water supply quality on the vertical infiltration of soil moisture, the soil of different bulk densities (1.35g/cm3, 1.45g/cm3) in Xiangshan area was taken as the research object. Select water supply quality as the influencing factor, and set 4 different conductivity water supply quality (0ms/cm, 2.5ms/cm, 5.0ms/cm, 7.5ms/cm) to soil infiltration time, infiltration rate, salt distribution characteristics The distribution characteristics of water content were studied, and Philip, Kostiakov and general empirical models were used to simulate the soil water infiltration process. The results show that the infiltration of brackish water can increase the infiltration performance of the two types of soil, and the effect on the soil with a bulk density of 1.35g/cm3 is more obvious. The Kostiakov infiltration equation can better fit the soil moisture of different bulk density Infiltration process, and the model has a higher fitting accuracy for the soil infiltration process with a soil bulk density of 1.45g/cm3. In the process of redistribution of soil moisture content and salinity, in the upper soil layer, the conductivity of 0ms/cm infiltration condition, the salt content of the soil layer of the two bulk density soils is less than the initial soil salt content, indicating that it is in different degrees Salt can be rinsed on the surface. Under the conditions of water supply conductivity of 2.5ms/cm, 5.0ms/cm,and7.5ms/cm, there are obvious salt accumulations in the soil column profiles of the two bulk density soils; Under the infiltration condition, in the upper layer of the soil, the soil moisture content of the two bulk densities showed a sharp decline trend, because the conductivity of the soil increased with the increase of electrical conductivity, but at the same depth, the soil bulk density The soil moisture content of 1.35g/cm3 is slightly higher than the soil moisture content of the sand density of 1.45g/cm3. This is because within a certain range, as the soil bulk density increases, the soil porosity decreases and the water content decreases. The movement process is hindered, which in turn affects the moisture content of the soil.