CONSERVATION, RESTORATION

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CONSERVATION, RESTORATION MANAGEMENT OF LAKES

• Jahnavi R, Jyotsna Sripada Divya P
• Vidyaniketan Pre-University College
• Ullal Upanagar, Bangalore 560 056
• December 28, 2006

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OBJECTIVE

• STUDY OF CONSERVATION, RESTORATION AND MANAGEMENT
  OF LAKES.
• EMPHASIS ON CONTRIBUTION OF LAKES TO OUR
  ECO-SYSTEM.

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INTRODUCTION

• USES OF LAKES
• ESSENTIAL FOR HUMAN HABITAT
• HOME TO BIRDS, FLORA FAUNA
• USEFUL IN RECHARGING GROUND WATER
• VITAL PART OF THE FRESH WATER ECO-SYSTEM
• FLOOD CONTROL AND STORM PROTECTION

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INTRODUCTION contd.

• CAUSES FOR LAKE DEPLETION
• INADEQUATE RAINFALL
• INDUSTRIAL WASTES
• DIGGING OF BOREWELLS
• UNPLANNED URBANIZATION

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PROJECT STUDIES

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

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SAMPLE ANALYSIS OF ULLAL LAKE
PARAMETER CONCENTRATION STANDARD VALUE CONCLUSION
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 - CONTAMINATED WITH PATHOGENS
CHLORIDES 25mg/l - NORMAL
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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
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INTERACTION WITH PUBLIC contd

• ACTIVITIES SPOILING THE LAKE
• DUMPING WASTE MATTER
• USAGE AS PUBLIC TOILET
• IMMERSION OF IDOLS

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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

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EXCESSIVE WEED GROWTH
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DUMPED GARBAGE
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CONSTRUCTION MATERIAL
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DYING AND DECOMPOSING BLUE GREEN ALGAE BLOOM
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BREEDING MOSQUITO LARVAE
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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

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DETAILED STUDY OF ULSOOR LAKE

• Size 50 acres
• Current problems
• HYACINTH INFESTED WATER
• CONTAMINATED WITH SLIME
• UNCHECKED EFFLUNTES
• SEWAGE DISCHARGE
• UNPLANNED URBANISATION

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STUDY OF ULSOOR LAKE CONTD

• SUGGESTIONS FROM SAVE ULSOOR LAKE FOUNDATION
• DESILTING OF LAKE
• MEASURES TO PREVENT SEWAGE AND POLLUTANTS

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EFFECT OF INADEQUATE DISSOLVED OXYGEN
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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
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KEMPEGOWDA BUS STATION ONCE DHARMAMBUDI LAKE
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GOLF COURSE- ONCE CHALLAGHATTA LAKE
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STADIUM ONCE SHOOLAY LAKE
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RESIDENTIAL LAYOUT ONCE KORAMANGALA LAKE

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lake Conservation

• DEVELOP AQUATIC LIFE
• PREVENT ENCROACHMENT
• SET UP AN INTERAGENCY REGULATORY BODY
• INVOLVE INSTITUTIONS AND COLLEGES INWATER QUALITY
  MONITORING
• CREATE PUBLIC AWARENESS.

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IN-LAKE RESTORATION TECHNIQUES
METHOD ADVANTAGES DISADVANTAGES
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
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AQUATIC PLANT CONTROL TECHNIQUES
METHOD ADVANTAGES DRAWBACKS
Manual Methods (Handpulling, raking and cutting) Inexpensive. Flexible. Not practical for large areas.
Weed Rolling Rolls plants flat or detaches them from bottom sediment Easy to operate, Can give season-long control. Good only for limited area around dock.
Herbicides Apply chemicals to kill or control plants. May control macrophyte and algae growth. Potential toxic effects. Decomposes plant material
Sediment Covers (Bottom barriers) Nontoxic. Low environmental impact High cost. Prone to damage, displacement, and plant regrowth
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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

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CONCLUSION

• ENVIRONMENTAL PRESSURE OF UNPLANNED URBANIZATION
  AND GROWING POPULATION HAVE TAKEN ITS TOLL ON
  WETLANDS.
• LAKES ARE POLLUTED MAINLY DUE TO SEWAGE FROM
  DOMESTIC INDUSTRIAL SECTORS
• IT REQUIRES IMMEDIATE ATTENTION FROM THE
  AUTHORITIES TO RESTORE THEM

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

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• T H A N K Y O U