摘要
该文通过对两组土样分别采用溴离子 (Br-)、3 H作示踪剂的示踪渗透实验 ,测定了土样的有效孔隙度 ,分析了实验结果的可靠性 ,认为引起两组实验结果之间差异的原因 ,可能是由于实验土样是带负电荷的黄土颗粒 ,它对溴离子 (Br-)有排斥作用 ,而3 H不受这一作用的影响 ,因此溴离子 (Br-)在相同介质和水头差的作用下运动得比3
The paper introduces three leading methods on determining the effective porosity of aquifer and discusses the principle to confirm effective porosity of aquifer by tracing infiltration experiment Br - and 3H are used as tracer in two-group experiments respectively to determine the effective porosity of aquifer medium. Dependability of experimental result is analyzed.Considering the reason of the difference between two groups experimental result be likely due to the loess grain bears electronegative,which is repulsive to Br -, therefore Br - moves slightly faster than 3H under the condition of the action of same media and water head difference.
出处
《勘察科学技术》
2002年第5期36-39,共4页
Site Investigation Science and Technology
基金
中国辐射防护研究院与日本原子力研究所合作研究项目"超铀核素近地表迁移行为及其处置安全评价方法学研究"的资助
