Fig. 1. Information of radiation environment monitoring points in Shenzhen

Fig. 2. Shenzhen environmental surface γ radiation dose rate level and change

Fig. 3. Concentration level and variation trend of atmos pheric aerosol radon in Shenzhen

Fig. 4. Activity concentration of total α in water

Fig. 5. Activity concentration of total β in water

Fig. 6. Total α, and β radioactivity level comparison in surface water (lakes and reservoirs) in Shenzhen

Fig. 7. Monitoring results of ²³⁸U(a), ²²⁶Ra(b), ²³²Th(c), and ⁴⁰K(d) content in soil in Shenzhen

Fig. 8. Change trend of natural radioactivity content in soil in Shenzhen