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本文以实验室内所开展的滴灌施用除草剂———阿特拉津在土壤中运移的物理模拟实验为基础,运用所求得的供试土壤的水力学参数和溶质运移参数及阿特拉津在该土壤中的吸附特性参数和降解速率常数,应用数值模拟软件HYDRUS 2D ,对物理模拟的实验结果进行了仿真,并就不同初始含水量、不同滴头流量对土壤水分和阿特拉津动态分布的影响进行了数值分析,结果表明:随着初始含水量的增加,土壤水分的湿润范围增大,而阿特拉津的分布范围基本不变;当滴灌施药历时相同、滴头流量不同时,随着滴头流量的增加,土壤水分和阿特拉津的运动范围均增大
In this paper, the laboratory carried out drip irrigation herbicide --- atrazine in the soil migration in the physical simulation experiments based on the use of the soil obtained by the test of hydraulic parameters and solute transport parameters and The adsorption parameters and degradation rate constants of terrazin in this soil were simulated by using HYDRUS 2D software. The experimental results of physical simulation were simulated. The effects of different initial water content and different dripper flow rates on soil moisture and Artemisia The results showed that the wetting range of soil moisture increased with the increase of initial water content, while the distribution range of atrazine did not change basically. When drip irrigation applied for the same duration, When the head flow is different, with the increase of dripper flow, the movement range of soil moisture and atrazine are increased