阿特拉津农药在包气带内运移模拟

对植物根区(土壤层)及渗流区(作物根区以下潜水面以上包气带部分)农药的行为进行了数学描述．应用植物根区数学模型模拟了旱田除草剂阿特拉津农药在研究区包气带中的行为．模拟结果表明，吸附系数较小、降解半衰期较长和在水中的溶解度较大的阿特拉津农药可长期残留在包气带内，并且能够随降雨入渗进入潜水含水层而污染地下水．

Study on transporting simulation of atrazine in unsaturated zone

This paper describes the behaviors of pesticide in the plant root zone (soil layer) and the seepage zone(the unsaturated zone between the root zone of plant and the unconfined water table) separately and then simulated the behavior of the herbicide atrazine in the unsaturated zone of research area by the plant root zone model (PRZM). The results of the simulation showed that atrazine ,which has relatively small adsorption coefficient, long half-life periods of degradation and large solubility in the water, may sustain in the unsaturated zone for a long time . At the same time , under the condition of precipitation, the atrazine may seapage into the phreatic aquifer as a result of ground water pollution. Therefore, in order to prevent the pollution of atrazine in ground water, we should bring the atrazine under control in the unsaturated zone, and puts emphasis on it.