Impacting Factors

Definition

Magnitude

1. Changing the usage of the area

The usage of the lands before tunneling activities

0 - 10

2. Exposition of the tunneling area

The view and visibility of the tunneling area.

0 - 10

3. Interference with surface water

The relationship between tunneling activities and surface water.

0 - 10

4. Interference with underground water

The relationship between tunneling activities and underground water table.

0 - 10

5. Waste waters

Waste water discharge area of the tunnel.

0 - 10

6. Increase in the traffic of the area

Influence of tunneling on the traffic situation of the area.

0 - 10

7. Dust emission

Dust emission in each part of tunnel.

1- Drilling machines 2- Explosion 3- Loading 4- Movement of the tracks on the road (from tunnel to dump).

5- The dust produced by wind from the waste dumps.

0 - 10

8. Toxic gas emission

Concentration of pollutants in tunnel air (ppm)

0 - 10

9. Noise pollution

-The noise level at the work environment caused by devices and machines in qualitative and quantitative form.

-Noise level caused by firing.

0 - 10

10. Land vibration

Intensity of underground vibration in the main underground facilities installations, refreshing place of the workers or the cross point of the shafts with the tunnel level (mm/sec).

0 - 10

The intensity of vibration on the surface with regard to the distance to the surface facilities.

11. Fly rock

Fly rock caused by blasting

0 - 10

12. Materials existed in the waste dump

The pollution level of the materials which exist in the waste dump.

0 - 10

13. Waste discharge method

Waste discharge method Geological studies of the waste dump, waste dam construction, and prediction of the dam life time.

Monitoring and control during the dam operation.

Putting signs and fences around the tailing dump and dam.

0 - 10

14. Domestic employment

Domestic employment rate in tunneling site

−10 - 10

15. Population control

Influence of tunneling on the population of the area

−10 - 10

Population of the tunneling site before and after the tunneling operation.

The type of influence of tunneling activities on the change in population.

16. Social and cultural development

Condition of the social and cultural institutes before and after the tunneling operation, in the fields bellow:

Educational, health and help, cultural, and artistic institutes Sport institutes. Amusement, and economical institutes

−10 - 10

Condition of urban facilities before and after the start of the tunneling operation in the fields bellow:

Water facilities, heating facilities, availability of the electricity, access roads, receiving the TV channels, and phone connections.

17. Instability of the established spaces

Stability condition of the excavation in the tunnel.

0 - 10

18. Subsidence

The subsidence condition in the tunneling area

0 - 10

19. Environmental arrangements

Green space construction, existence of R & D in the tunneling site, taking the environmental ISO, assembling the health, security and environmental manuals.

Dust controlling unit, lessening the noise level, Recycling the gangue dam water, refining the industrial and sanitary waste water of the tunneling site.

−10 - 10

20. Light

Illumination (Lux) in the work area.

0 - 10