The document discusses different types of lakes categorized based on their nutrient levels and source. There are three main types: oligotrophic lakes which have very low nutrient levels and clear water; mesotrophic lakes which have moderate nutrient levels; and eutrophic lakes which have high nutrient levels and murky water. Other lake types include tectonic, volcanic, glacier, salty, artificial, oxbow, and meromictic lakes which have specific geological or environmental characteristics.

1. Types of lake
Presented by
Ahmad Ali
P.hD scholar P.U
chandigarh

2. Lake
A depression on the surface of the earth, where water gets collected .
known as a lake.

3. Where does each lake type fall
on the line?
Low
nutrients
Very high
nutrients

4. Lake types
On the basis of its tropic status
Trophy = nutrient (phosphorus and
nitrogen )
1.Oligotrophic.
2.Mesotrophic.
3.Eutrophic.

5.  low nutrients (P&N)
 Clear water
 Often steep sided and deep
 Usually replenished by snow, glacier melt
 Examples: Lake Tahoe, Crater Lake
Oligotrophic lakes

6. Mesotrophic lakes
 Meso = middle or mid
 Great fishing lakes
 Stratification

7. Eutrophic lakes
 High nutrient levels
 Murky, green water
 Usually shallow.
 Usually replenished by rivers/streams

9. Cultural Eutrophication
 We artificially cause lakes to become
eutrophic by
 Runoff
 Pollutants
 Thermal pollution
 Lakes become hypereutrophic

10. Other lake types

11. Tectonic lakes
Ex. Lake Baikal

12. Volcanic lakeVolcanic lake
Associated with volcanic activity
Form when the shut off volcano will be filled with
water
Associated with volcanic activity
Form when the shut off volcano will be filled with
water

13. Glacier LakesGlacier Lakes
Formed when the surface is scoured, deepened and
widened by the glacier.
And the surface will be filled by glacier melt water
Formed when the surface is scoured, deepened and
widened by the glacier.
And the surface will be filled by glacier melt water

14. Salty LakesSalty Lakes
Cause by the limited supply of freshwater
Tendency to concentrate the water with minerals
Cause by the limited supply of freshwater
Tendency to concentrate the water with minerals

15. Artificial LakesArtificial Lakes
Manmade lakes
For water reservoirs, electricity generation, etc.
Manmade lakes
For water reservoirs, electricity generation, etc.

16. Oxbow lake

17. Meromictic lake
 Layer of water which don't intermix

18. Rift valley lake

19. Thank you