EFFECT OF AGRO-ECOSYSTEM AND FARMING PRACTICES ON GROUND WATER QUALITY BY POOJA K

1. welcome

2. Effect of Agro-ecosyste
m and Farming practic
es on Groundwater qua
lity

3.  INTRODUTION

6. 1.Point sources:
Discharge from
factory /sewage outfills.
2.Non-point sources:
Includes agricultural
runoff ,urban wastes .
Groundwater contamination sources
.

7. Effect of Farming practices on quality of Groundwat
er

8. Components
 Fertilizers
 Pesticides ,insecticides ,herbicides
• Poor water managemment
 Soil Ammendments
Farming practices

10. Corrosivity of sulphate

11. Waste disposal and animal waste
Irrigation returns flows

12. Consumption of pesticides in India

15.  CULTIVATION OF CROPS .
• Intensive crop cultivation areas on sandy soil.
• GW with shallow wells of <15m depth is heavily
polluted with greenhouse vegetable production
area , due Nitrate leaching.

16. •Nitrate accumulated in the vegetable cultivation soil
enter to shallow groundwater.
•GW with shallow wells of <15m depth is heavily
polluted with Greenhouse vegetable production area ,
due to Nitrate leaching.

17. • Infiltration through riverbeds ,leaching through soil are
the main diffuse pesticides inputs into groundwater.
• Among pesticides , herbicides like traiazines (atrazine,
simazine), phenylurea anilides and insecticides like Ora
ganophosphorusn,oraganochlorines etc .

18.  Proportion of selected pesticides

20. Agro-ecosystem Effect on Quality
of Groundwater

21.  SALT WATER INTRUSION
• In many semi arid areas , large reservoirs havi
ng more salts includes Cl,So4,F and No3,have a
ccumulated by precipitation.
• Irrigation in arid areas, often leads to deteriora
tes the quality of GW due to movement of salts
stored in un saturated zone to groundwater.

23.  Soil salinity developed in farmers fields

26. Solid waste
• Dumping of wastes is subjected to leaching by
percolating rainwater to groundwater.
• It causes algal bloom formation and eutrophic
ation in water.
• Fluoride
• Arsenics
• Chlorinated compounds

28. Semiarid region

29. Salinisation of soil

30. Nitrate contamination in confined aquifier

31. Distribution of EC in confined aquifier

32. Management

35. Remidiation
 Physical
 Chemical
• injection of ozone gas
• Carbon absorption
• Ion exchange
 Biological
• Bioremidiation
• Bioventing
• Biosparging

36. District with highest contamination i
n Groundwater

37. Conclusion
• Limitation in fertilizer use
• Use less phyto-sanitary products of pesticidal re
sidues in groundwater.
• Use Recommended and less residual characters
tics chemicals.
• Use of Biopesticides.
• Use of bio char to reduce pesticides leaching to
groundwater.

38. • Soil and Groundwater Pollution From Agricult
ural Activities. T.V.Ramachandra
• Internet sources.
References

39. Review of Literature
• Allison, G.B. Hughes Land clearance and river
salinisation in the western basin.119,1-20.
• Bruce , Becker Groundwater quality beneath irri
gated agriculture in the central high plains aqui
fer.Rept.27,03-4219.
• R.C.Stonestorm Occurence and Behaviour of sul
phate , Fluoride during chloride mobilization ca
used by agricultural land use changes in semiari
d region . south western US .Water resource Re
s.45,WOOA18.
•

40. Thank you