Lakes are inland bodies of water formed in depressions where water collects. They are formed through processes like diastrophism, glacial action, and volcanic activity. Lakes provide many benefits like transportation, water storage, hydroelectric power, and recreation. Specific types of lakes include kettle lakes formed in depressions left by melting glaciers, tarn lakes in mountain hollows, and volcanic lakes that form in volcanic craters. Oxbow lakes form from river meanders that are cut off. Swamps occur in low-lying areas and transition between lakes and dry land depending on the season. Rivers are natural freshwater streams that flow towards seas, lakes or other rivers. Meltwater from glaciers feeds streams

2. Lake
• Is an inlandbody ofwater, smallto moderately large,
withits surfacewater exposed to the atmosphere.
• Existenceof a depression/ basinwithoutan outletat
the bottomand depressed water table are considered
in lake formation.

3. Factors in LakeFormation
Diastrophism
Glacialaction
Volcanicaction

4. Importance of Lakes
• Provide Cheap transportation
• Serves as waterreservoir
• Provide waterforgeneratingelectricity
• Source oflivinghood- fishing
• Form ofrecreation

6. Kettle Lake
• Melting glaciers leave behindice blocks
and debris. Melted ice fills depressions
between the debris to form kettle lakes.

8. Tarn
• Circular mountainlake is known as a
tarn.
• Theselakes form inhollow worn by
glacial erosionor blockedby ice debris.

10. Volcanic Lake
•is the craters of ancient
volcanoes fill upwith water and
produce lakes.

12. Oxbow Lake
• Is a curved lake appears when a river
cuts off a meanderloop.
• The lake eventually fills withsediments
and vegetation.

14. Stream
• is a body of runningwater moving
under theinfluence of gravity to lower
levels in a narrow clearly defined
natural channel.

16. Swamp
• is a basin that becomes partly or
completely filled with fresh and decayed
vegetation sediment in water.
• It becomes lakes during rainy season and
swamps during dry months.

17. • The regions where swamps are
common..
(1) Glaciated Region
(2) Coastal Region and
(3) Flood plains and delta’s of rivers

19. River
• is natural streamof waterof fairlylarge
size flowingin a definite course. It is a
large,natural freshwatersurface stream
having a permanent or seasonal flow and
moving downwards the sea,lake or
another river in a definite channel.

21. Melt Water
• is arivermay begin its life in a glaciated
part of the world. Melting ice and snow
from a glacier feed mountain streams.

22. • OVERLAND FLOWis rainwater running
downhillgathers into small streams called
TRIBUTARIES, whichjointo form river.

23. WaterFalls
• a perpendicular or nearly perpendicular descent of
water in a stream.
• a stream of water descending suddenly from higher
to a lower level. A river flows swiftly near its source
cutting through soft rocks more easily than hard.
• A sheer face of hard rock is exposed where water
plunges, undercutting the rock below.

24. Cascade Falls has small water volume

25. Cataract has large water volume