This document discusses the conservation, restoration, and management of lakes. It begins by outlining the objectives and importance of lakes for ecosystems and human habitats. Several causes of lake depletion are then described, including inadequate rainfall, industrial wastes, borewell digging, and unplanned urbanization. The document then examines case studies of specific lakes in India, including analyses of water quality, public surveys, and restoration strategies. It concludes by stressing the toll that urbanization and pollution have taken on lakes and the need for immediate action to restore them.

1. CONSERVATION, RESTORATION & MANAGEMENTCONSERVATION, RESTORATION & MANAGEMENT
OF LAKESOF LAKES
Jahnavi R, Jyotsna Sripada & Divya P
Vidyaniketan Pre-University College
Ullal Upanagar, Bangalore 560 056
December 28, 2006

2. OBJECTIVEOBJECTIVE
 STUDY OF CONSERVATION, RESTORATIONSTUDY OF CONSERVATION, RESTORATION
AND MANAGEMENT OF LAKES.AND MANAGEMENT OF LAKES.
 EMPHASIS ON CONTRIBUTION OF LAKESEMPHASIS ON CONTRIBUTION OF LAKES
TO OUR ECO-SYSTEM.TO OUR ECO-SYSTEM.

3. INTRODUCTIONINTRODUCTION
USES OF LAKES :USES OF LAKES :
 ESSENTIAL FOR HUMAN HABITATESSENTIAL FOR HUMAN HABITAT
 HOME TO BIRDS, FLORA & FAUNAHOME TO BIRDS, FLORA & FAUNA
 USEFUL IN RECHARGING GROUNDUSEFUL IN RECHARGING GROUND
WATERWATER
 VITAL PART OF THE FRESH WATERVITAL PART OF THE FRESH WATER
ECO-SYSTEMECO-SYSTEM
 FLOOD CONTROL AND STORMFLOOD CONTROL AND STORM
PROTECTIONPROTECTION

4. INTRODUCTIONINTRODUCTION contd.contd.
 CAUSES FOR LAKE DEPLETION:CAUSES FOR LAKE DEPLETION:
– INADEQUATE RAINFALLINADEQUATE RAINFALL
– INDUSTRIAL WASTESINDUSTRIAL WASTES
– DIGGING OF BOREWELLSDIGGING OF BOREWELLS
– UNPLANNED URBANIZATIONUNPLANNED URBANIZATION

5. PROJECT STUDIES
 Sample analysis of Ullal lake.
 Conclusion of a survey conducted in
the area.
 Interview with an environmentalist
 Detailed study of Ulsoor lake .

6. SAMPLE ANALYSIS OF
ULLAL LAKE
PARAMET
ER
CONCEN
TRATIO
N
STANDA
RD
VALUE
CONCLUS
ION
PH 7.4 6 - 8.5 NORMAL
DISSOLVED
OXYGEN
6.4 mg/l 9.1 mg/l NORMAL
BIOLOGICAL
OXYGEN
DEMAND
1.1mg/l 1 – 2mg/l NORMAL
E.COLI 240 - CONTAMINATE
D WITH
PATHOGENS
CHLORIDES 25mg/l - NORMAL

7. INTERACTION WITH
PUBLIC
NUMBER OF
RESPONDENTS
15
PERIOD OF RESIDENCY 4 TO 20 YEARS
OCCUPATION DETAILS ORGANISED SECTOR -8
BUSINESS- 2,UNORGANISED- 5
AGE GROUP OF
RESPONDENTS
7 TO 60 YEARS

8. INTERACTION WITH PUBLIC CONTDINTERACTION WITH PUBLIC CONTD
 ACTIVITIES SPOILING THEACTIVITIES SPOILING THE
LAKE:LAKE:

DUMPING WASTE MATTERDUMPING WASTE MATTER

USAGE AS PUBLIC TOILETUSAGE AS PUBLIC TOILET

IMMERSION OF IDOLSIMMERSION OF IDOLS

9. LAKE PROBLEMS
 EUTROPHICATION – The ageing process
 SEDIMENTATION – Soils wash into the lake
 EXCESS ALGAE – Microscopic aquatic plants
 CONTAMINATION – Pollution from toxic substances
 ATMOSPHERIC DEPOSITION OF POLLUTANTS

10. EXCESSIVE WEED GROWTH

11. DUMPED GARBAGE

12. CONSTRUCTION MATERIAL

13. DYING AND DECOMPOSING BLUE GREEN ALGAE BLOOM

14. BREEDING MOSQUITO LARVAE

15. STRATEGIES FOR
RESTORATION (ULLAL LAKE)
 ADHERENCE TO WATER QUALITY STANDERDS(WQS)
 WEED REMOVAL
 AFFORESTATION ALONG TANK BUND
 DESILTATION
 PREVENT POINT SOURCE OF POLLUTION
 CORRECT NON-POINT SOURCE POLLUTION PROBLEMS

16. DETAILED STUDY OF ULSOOR LAKE
Size: 50 acres
Current problems:
HYACINTH INFESTED WATER
CONTAMINATED WITH SLIME
UNCHECKED EFFLUNTES
SEWAGE DISCHARGE
UNPLANNED URBANISATION

17. STUDY OF ULSOOR LAKE CONTD
 SUGGESTIONS FROM “SAVE ULSOOR
LAKE FOUNDATION”
DESILTING OF LAKE
MEASURES TO PREVENT SEWAGE AND
POLLUTANTS

18. EFFECT OF INADEQUATE DISSOLVED
OXYGEN

19. LOST LAKES
NAME OF LAKE STATUS NOW
SHOOLY LAKE FOOTBALL STADIUM
AKKITHIMMANAHALI
LAKE
HOCKEY STADIUM
DARMAMBUDI LAKE KEMPEGOWDA BUS
STAND
CHALLAGATTA LAKE GOLF COURSE
DOMLUR LAKE BDA LAYOUT
NAGASHETTIHALI
LAKE
SPACE DEPARTMENT

20. KEMPEGOWDA BUS STATION – ONCE
DHARMAMBUDI LAKE

21. GOLF COURSE- ONCE CHALLAGHATTA LAKE

22. STADIUM – ONCE SHOOLAY LAKE

23. RESIDENTIAL LAYOUT – ONCE
KORAMANGALA LAKE

24. lakeConservation
 DEVELOPAQUATIC LIFE
 PREVENT ENCROACHMENT
 SET UPAN INTERAGENCY REGULATORY BODY
 INVOLVE INSTITUTIONS AND COLLEGES INWATER
QUALITY MONITORING
 CREATE PUBLIC AWARENESS.

25. IN-LAKE RESTORATION
TECHNIQUES
METHOD ADVANTAGES DISADVANTAGE
S
DILUTION WASHES OUT
SURFACE ALGAE
REQUIRES LARGE
VOLUME OF WATER
ARTIFICIAL
CIRCULATION
PROVIDES AERATION
AND OXYGENATION
DOES NOT DECREASE
ALGAE BIOMASS
DREDGING CONTROLS AQUATIC
VEGETATION
HIGH COST

26. AQUATIC PLANT CONTROL
TECHNIQUES
METHOD ADVANTAGES DRAWBACKS
Manual Methods:
(Handpulling, raking and
cutting)
Inexpensive. Flexible.Inexpensive. Flexible. Not practical for largeNot practical for large
areas.areas.
Weed Rolling:
Rolls plants flat or
detaches them from
bottom sediment
Easy to operate, CanEasy to operate, Can
give season-longgive season-long
control.control.
Good only for limitedGood only for limited
area around dock.area around dock.
Herbicides: Apply
chemicals to kill or
control plants.
May controlMay control
macrophyte and algaemacrophyte and algae
growth.growth.
Potential toxic effects.Potential toxic effects.
Decomposes plantDecomposes plant
materialmaterial
Sediment Covers
(Bottom barriers)
Nontoxic. LowNontoxic. Low
environmental impacenvironmental impactt
High cost. Prone toHigh cost. Prone to
damage, displacement,damage, displacement,
and plant regrowthand plant regrowth

27. WETLAND MANAGEMENT
 INTENSIVE MONITORING
 INTERACTION AND COOPERATION AMONG VARIOUS AGENCIES
INVOLVED
 MAINTAIN IMPORTANT NATURAL PROCESSES THAT OPERATE ON
LAKES THAT MAY BE ALTERED BY HUMAN ACTIVITIES
 CONDUCT REGULAR WATER QUALITY MONITORING
 CREATING BUFFER ZONES FOR LAKE PROTECTION
 DEVELOPMENT OF WATER QUALITY DATABASE
 ANALYSE AND DISCUSS CASE STUDIES

28. CONCLUSIONCONCLUSION
 ENVIRONMENTAL PRESSURE OFENVIRONMENTAL PRESSURE OF
UNPLANNED URBANIZATION ANDUNPLANNED URBANIZATION AND
GROWING POPULATION HAVE TAKEN ITSGROWING POPULATION HAVE TAKEN ITS
TOLL ON WETLANDS.TOLL ON WETLANDS.
 LAKES ARE POLLUTED MAINLY DUE TOLAKES ARE POLLUTED MAINLY DUE TO
SEWAGE FROM DOMESTIC & INDUSTRIALSEWAGE FROM DOMESTIC & INDUSTRIAL
SECTORSSECTORS
 IT REQUIRES IMMEDIATE ATTENTIONIT REQUIRES IMMEDIATE ATTENTION
FROM THE AUTHORITIES TO RESTOREFROM THE AUTHORITIES TO RESTORE
THEMTHEM

29. HAD ALL THE LAKES BEEN PROTECTED,
BANGALORE
WOULD HAVE BEEN NEXT TO
WALES OF U.K.

30. T H A N K Y O U