environment

1. ENVIRONMENTAL GEOTECHNOLOGY –
APPLICATIONS AND CASE STUDY ON LAND
FILL
Dr.N.Ramesh
Professor / Civil
KSRCT
Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 1

2. INTRODUCTION
Environmental geotechnics is an interdisciplinary subject that
applies geotechnical principles, processes and techniques in a way
to preserve the environment.
All the construction activities especially those that close related
to geotechnical engineering should be carefully plan and the
execution should not bring any harm to the environment.
In order to achieve that, the application of modern tools are
encourage so that it will not only reduce the environmental impact
but also benefit the environment.
Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 2

3. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 3

4. WHY IT IS NEEDED
Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 4

5. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 5

6. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 6

7. APPLICATIONS OF
ENVIRONMENTAL
GEOTECHNOLOGY IN LANDFILL
DEVELOPMENT
SITE SELECTION CRITERIA
Neighborhood (Distance required from residential area and surface water
bodies.)
Geological and hydrological conditions of the area.
Seismic conditions of the area.
Existence of ground water and its current as well as future utilization
Risk assessment of flooding, subsidence and landslides.
Transport distance and existing infrastructure in terms of access roads,
electricity etc.
Topography of the site.
Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 7

8. LANDFILL LINER SYSTEM
A landfill liner is meant to be a low permeable barrier which is
laid down under engineered landfill sites.
WHY IT IS NEEDED:
Landfill liner retards migration of leachate and toxic compounds
into underlying aquifers or nearby rivers causing contamination of the
local water.
TYPES:
Single liner
Composite liner
Double liner
Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 8

9. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 9

10. ENVIRONMENTAL IMBALANCE
Solid & liquid wastes
Petroleum contamination
Acid rain & acid drainage
Scrap wastes
Arid lands and deserts
Wetlands
Coastal margins
Soil erosion
Land subsidence
Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 10

11. WATER POLLUTION
Depletion of dissolved oxygen through aerobic decay.
Bacteriological and virus contaminations.
Pollution of surface streams with runoff from the site.
Chemical alteration of groundwater and surface waters.
GAS AND AIR POLLUTION
Noxious odors.
Releases of methane from anaerobic decomposition, ammonia, hydrogen,
hydrogen sulfates and other gases.
Dust released during operations and smoke caused by fires.
SOIL POLLUTION
Release of ions that can react with the soils.
Release of chemical compounds or ions that are taken up and concentrated
in plants.
AESTHETIC POLLUTION
Unsightly or odious aspects of an active landfill.
Increased traffic and truck spillage.
Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 11

12. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 12

13. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 13

14. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 14

15. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 15

16. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 16

17. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 17

18. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 18

19. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 19

20. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 20

21. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 21

22. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 22

23. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 23

24. CONCLUSION
Improper dumping may lead to different kind of
pollution : water pollution, gas and air pollution, soil
pollution, aesthetic pollution.
There are four important elements in sanitary landfill
design : daily cover, leachate collection system, gas
ventilation system, permanent cover.
Geosynthetics material can be divided into several
types and each of it has different function and
application : geocomposite, geofoam, geomembrane,
geosynthetic clay liner, geotextile.
Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 24

25. CASE STUDY
Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 25

26. Friday, 16 June 2023 DR.N.RAMESH, PROFESSOR / CIVIL, KSRCT 26