conservation, restoration & management of lakes jahnavi r, jyotsna sripada & divya p...
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CONSERVATION, RESTORATION & CONSERVATION, RESTORATION & MANAGEMENT OF LAKESMANAGEMENT OF LAKES
Jahnavi R, Jyotsna Sripada & Divya P
Vidyaniketan Pre-University CollegeUllal Upanagar, Bangalore 560 056
December 28, 2006
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OBJECTIVEOBJECTIVE
STUDY OF CONSERVATION, RESTORATION STUDY OF CONSERVATION, RESTORATION AND MANAGEMENT OF LAKES.AND MANAGEMENT OF LAKES.
EMPHASIS ON CONTRIBUTION OF LAKES EMPHASIS ON CONTRIBUTION OF LAKES TO OUR ECO-SYSTEM.TO OUR ECO-SYSTEM.
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INTRODUCTIONINTRODUCTIONUSES OF LAKES :USES OF LAKES :
ESSENTIAL FOR HUMAN HABITATESSENTIAL FOR HUMAN HABITAT HOME TO BIRDS, FLORA & FAUNA HOME TO BIRDS, FLORA & FAUNA USEFUL IN RECHARGING GROUND USEFUL IN RECHARGING GROUND WATERWATER
VITAL PART OF THE FRESH WATER VITAL PART OF THE FRESH WATER ECO-SYSTEMECO-SYSTEM
FLOOD CONTROL AND STORM FLOOD CONTROL AND STORM PROTECTIONPROTECTION
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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
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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 -8BUSINESS- 2,UNORGANISED- 5
AGE GROUP OF RESPONDENTS
7 TO 60 YEARS
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INTERACTION WITH PUBLIC INTERACTION WITH PUBLIC contdcontd
ACTIVITIES SPOILING THE LAKE:ACTIVITIES SPOILING THE LAKE:
DUMPING WASTE MATTERDUMPING WASTE MATTER
USAGE AS PUBLIC TOILETUSAGE AS PUBLIC TOILET
IMMERSION OF IDOLSIMMERSION 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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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 LAKESNAME 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 TECHNIQUESMETHOD 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
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AQUATIC PLANT CONTROL TECHNIQUES
METHOD ADVANTAGES DRAWBACKS
Manual Methods: (Handpulling, raking and cutting)
Inexpensive. Flexible.Inexpensive. Flexible. Not practical for large Not practical for large areas.areas.
Weed Rolling: Rolls plants flat or detaches them from bottom sediment
Easy to operate, Can Easy to operate, Can give season-long give season-long control.control.
Good only for limited Good only for limited area around dock.area around dock.
Herbicides: Apply chemicals to kill or control plants.
May control May control macrophyte and algae macrophyte and algae growth.growth.
Potential toxic effects. Potential toxic effects. Decomposes plant Decomposes plant materialmaterial
Sediment Covers (Bottom barriers)
Nontoxic. Low Nontoxic. Low environmental impacenvironmental impactt
High cost. Prone to High cost. Prone to damage, displacement, damage, displacement, and plant regrowthand 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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CONCLUSIONCONCLUSION ENVIRONMENTAL PRESSURE OF ENVIRONMENTAL PRESSURE OF
UNPLANNED URBANIZATION AND GROWING UNPLANNED URBANIZATION AND GROWING POPULATION HAVE TAKEN ITS TOLL ON POPULATION HAVE TAKEN ITS TOLL ON WETLANDS.WETLANDS.
LAKES ARE POLLUTED MAINLY DUE TO LAKES ARE POLLUTED MAINLY DUE TO SEWAGE FROM DOMESTIC & INDUSTRIAL SEWAGE FROM DOMESTIC & INDUSTRIAL SECTORSSECTORS
IT REQUIRES IMMEDIATE ATTENTION FROM IT REQUIRES IMMEDIATE ATTENTION FROM THE AUTHORITIES TO RESTORE THEMTHE 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