摘要
论文通过野外实验,将钢管从地表压入地下,保持土层不扰动的基础上形成5个垂直土柱,配制成定浓度溶液在表层向下连续入渗,实验结束后取不同深度土样,进行室内浸泡,测试水中NH4+浓度,换算土中NH4+含量,应用数值法计算模拟NH4+在地下水中的迁移转化和土层中的含量。试验结果表明:(1)单次灌溉对地下水不会构成威胁;(2)同浓度不同时间以及同时间不同浓度下,氨氮迁移随深度增加减弱,为氮的污染治理提供了参考。
During the filed experiments,5 vertical soil columns were made by pressing steel pipes into the ground and keeping the soil layer undisturbed simultaneously.Each soil column was continuously irrigated with the prepared solution from the surface.After finishing the irrigation,soil samples in different depths from each soil column were immersed in laboratory for measuring the concentration of NH4+in the solution,which were converted into the NH4+concentration in soil.Numerical method was applied to compute the NH4+content in soil layer and simulate the migration and transformation of NH4+in groundwater.The results showed that(1)irrigation in a single time did not significantly influence the health of groundwater;(2)the migration of NH4+decreased along the depth gradient,which is independent of the irrigation time and the solution concentration,thus providing a reference for nitrogen pollution control.
作者
李铎
李方红
李安娜
毕攀
LI Duo;LI Fang-hong;LI An-na;BI Pan(Hebei GEO University,Shijiazhuang 050031,China)
出处
《河北地质大学学报》
2020年第5期55-59,共5页
Journal of Hebei Geo University
基金
河北省高等教育教学改革研究与实践项目“面向工程教育认证地下水科学与工程专业建设与人才培养的探索与实践”(2018GJJG283)
河北省科技厅创新能力提升计划项目“河北省再生水资源利用与发展对策研究”(19454209D)。
关键词
NH4+
室外实验
含水介质
数值模拟
NH4+
outdoor experiment
aquifer media
numerical simulation
