利用一维代数模型分析微咸水入渗特征

由于淡水资源短缺，微咸水的开发利用成为缓解农业水资源短缺的重要措施，为了研究微咸水条件下的土壤入渗过程，进行了室内微咸水垂直一维入渗试验，分析了不同矿化度的微咸水累积入渗水量随时间的变化过程，并利用一维代数入渗模型模拟计算了土壤含水率剖面。结果表明：含水率模拟计算结果与实测值相吻合。同时利用一维代数入渗模型和Green-Ampt模型对试验资料进行处理，结果表明两模型均可以比较精确地描述微咸水入渗过程，因此两模型可以互相计算参数，但长历时入渗用Green-Ampt模型计算更加精确。

Infiltration characteristics of brackish water by one dimensional algebraic model

Due to the shortage of fresh water, exploitations of brackish water become very important for mitigating water shortage for farmland irrigation. To study the infiltration process of the brackish water, one dimensional infiltration experiments were conducted in laboratory. The changes of the cumulative infiltration with time under different mineralization degrees were analyzed, and the water content of the soil profile was simulated based on a algebraic model for one dimensional infiltration. Results show that the simulation results are well matched with the measured results. The Green-Ampt model was also used to process the experimental data. Results show that it can also be used to describe the brackish water infiltration process. Therefore the two models can be applied to calculate parameters. However, the Green-Ampt model can generate more accurate results in the case of long duration infiltration.