CAJ | 학술논문

测定了土壤包气层中氚在天然条件和人工喷淋条件下的扩散系数，研究了氚示踪剂在黄土包气层中的迁移规律。实验结果表明，在华北地区黄土高原天然条件下，包气带中氚示踪剂以0.03cm/d速度迁移，纵向扩散系数Dx为0.10cm2/d；在2m2实验坑中，以5mm/h喷淋强度每天喷淋3h的条件下，氚示踪剂以2.27cm/d的速度向下迁移，Dx为7.75cm2/d。
측정료토양포기층중천재천연조건화인공분림조건하적확산계수，연구료천시종제재황토포기층중적천이규률。실험결과표명，재화북지구황토고 원천연조건하，포기대중천시종제이0.03cm/d속도천이，종향확산계수Dx위0.10cm2/d；재2m2실험갱중，이5mm/h분림강도매천분림3h적조건하，천시종제이2.27cm/d적속 도향하천이，Dx위7.75cm2/d。
Diffusivity of 3H was measured in soil aerated zone on both natural and artificial rainfall conditions, migration of 3H tracer was also studied in loess aera ted zone at the same time. The results implied that the migration velocity of 3H tracer in aerated zone was 0.03cm/d on natural condition in loess p lateau of Huabei Region, the vertical diffusivity Dx was 0.10cm2/d. In the experiment pit, the migration velocity was 2.27cm/d under an artificial condition of 5mm/h sprinkling intensity for 3 hours each day, the vertical diffusivity Dx was 7.75cm2/d.