class 9 geograghy chapter 5 drainage lakes

2. LAKES
CLASS 9 GEOGRAPHY CHAPTER 3
PRESENTED BY DHANVITH, AKARSH, HITHALI,
PUNEETH AND SAMARTH

3. WHAT IS A LAKE??
LAKE IS A LARGE BODY OF WATER SURROUNDED
BY LAND

4. USES OF LAKES...
USED IN MAKING OF SALTS
ARTIFICIAL LAKES ARE USED TO STORE WATER FOR
TIMES OF DROUGHT (RESERVIORS) - THEY ARE
UTILISED FOR THE SUPPLY OF WATER ALL OVER THE
WORLD
EX: GURU GOBIND SAGAR – HIMACHAL PRADESH

5. HOW ARE LAKES
FORMED??
RAIN
ACTION OF GLACIERS, & ICESHEETS
FORMED BY WIND, RIVER, ACTION & HUMAN
ACTIVITIES

6. TYPES OF LAKES...
• Freshwater Lakes.
• Saltwater Lakes.
• Natural Lakes.
• Oxbow Lakes.
• Artificial Lakes.

7. FRESHWATE
R LAKE...
• FORMED BY MELTING OF GLACIERS, ICE ICE SHEETS, SNOW,
RAIN, ETC.
• EXAMPLE: WULAR LAKE IN JAMMU-KASHMIR

8. SALINE WATER
LAKES...
• CONTAINS SALTS AND MINERALS WHICH IS IMPOSSIBLE TO DEPART
• IF LAKE'S SALINITY INCREASES... IT MAKES A GOOD SPOT FOR SALT
PRODUCTION
• EXAMPLE: SAMBHAR LAKE IN RAJASTHAN

9. NATURAL
LAKES...
• FOUND IN MOUNTAINOUS REGIONS AND AREAS WHERE STILL
GLACIERS EXIST.
• THEY ARE FORMED NATURALLY...
• EXAMPLE: DAL LAKE IN SRINAGAR

10. ARTIFICIAL
LAKES...
• OFTEN KNOWN AS RESERVOIRS
• USED AS MAIN SOURCE OF WATER ALL OVER THE WORLD
• CREATED BY DAMMING A RIVER SECTION
• CAN BE BUILT BY EXCAVATING THE LAND
• EXAMPLE: BHOJITAL LAKE IN MADHYA PRADESH

11. OX-BOW
LAKE...
• GENERATED BY RIVER BENDS IE, U-TURN OR CURVE AND CUT OFF
FROM MAIN RIVER FLOW
• HAS MEANDERS LIKE EVERY RIVERS
• EXAMPLE: KABAR TAAL IN BIHAR

12. HOW ARE LAKES
POLLUTED??
• THROWING WASTE INTO THE WATER BODIES
• EXCESS USE OF FERTILISERS IN NEARBY FIELDS
• INTRODUCTION TO MANY AQUATIC WEEDS LIKE WATER
HYACINTH

13. WATER HYACINTH...

14. IMPORTANCE OF
LAKES...
• MAIN SOURCE OF WATER FOR HUMANS AND ANIMALS
LIVING IN DRY & ARID REGIONS
• MAINTAINS THE AQUATIC ECOSYSTEM
• HELPS IN DEVOPING TOURISM
• HELPS TO REGULATE THE FLOW OF WATER DURING
RAINY SYSTEM AND PREVENTS FLOODING

15. IMPORTAN
T LAKES IN
INDIA...

17. 1. DEFINE LAKE
LAKE IS A LARGE BODY OF WATER SURROUNDED BY LAND

18. 2. LIST OUT THE USES OF LAKES
ØUSED IN MAKING OF SALTS
ØARTIFICIAL LAKES ARE USED TO STORE WATER FOR TIMES OF
DROUGHT (RESERVIORS) - THEY ARE UTILISED FOR THE SUPPLY
OF WATER ALL OVER THE WORLD

19. 3. HOW LAKES ARE FORMED?
• RAIN​
• ACTION OF GLACIERS, & ICESHEETS​
• FORMED BY WIND, RIVER, ACTION & HUMAN ACTIVITIES

20. 4. LIST OUT THE TYPES OF
LAKES
• Freshwater Lakes.
• Saltwater Lakes.
• Natural Lakes.
• Oxbow Lakes.
• Artificial Lakes.

21. 5. GIVE REASON FOR THE POLLUTION OF
LAKES
• THROWING WASTE INTO THE WATER BODIES
• EXCESS USE OF FERTILISERS IN NEARBY FIELDS
• INTRODUCTION TO MANY AQUATIC WEEDS LIKE
WATER HYACINTH

22. 6. WHY LAKES ARE IMPORTANT?
• MAIN SOURCE OF WATER FOR HUMANS AND
ANIMALS LIVING IN DRY & ARID REGIONS
• MAINTAINS THE AQUATIC ECOSYSTEM
• HELPS IN DEVOPING TOURISM
• HELPS TO REGULATE THE FLOW OF WATER
DURING RAINY SYSTEM AND PREVENTS FLOODING

23. 7. NAME THE TWO LAKES LOCATED IN
KASHMIR...
• WULAR LAKE
• DAL LAKE

24. 8. WHICH TYPE OF LAKE IS OFTEN
KNOWN AS RESERVIORS?
• ARTIFICIAL LAKES

25. 9. FRESHWATER LAKE IS FORMED BY....
• RAIN
• MELTING OF GLACIERS, ICESHEETS, SNOW, ETC.

26. 10. LOCATE THE
FOLLOWING
• SAMBHAR LAKE
• CHILIKA LAKE
• BHIMTAL LAKE
• KANWAR LAKE
• PULICAT LAKE
• KOLLERU LAKE
• ASTAMUDI LAKE
• VEMBANAD LAKE

27. THANK YOU