CONSERVATION, RESTORATION & MANAGEMENT OF LAKES

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Presentation transcript:

CONSERVATION, RESTORATION & MANAGEMENT OF LAKES Jahnavi R, Jyotsna Sripada & Divya P Vidyaniketan Pre-University College Ullal Upanagar, Bangalore 560 056 December 28th 2006 © JaJyoDi

OBJECTIVE THE PROJECT MAINLY DEALS WITH CONSERVATION, RESTORATION AND MANAGEMENT OF LAKES. EMPHASIS ON PROTECTING OUR LAKES © JaJyoDi

USES OF LAKES : ESSENTIAL FOR HUMAN HABITAT HOME TO RARE BIRDS, FLORA & FAUNA USEFUL IN RECHARGING GROUND WATER VITAL PART OF THE FRESH WATER ECO-SYSTEM FLOOD CONTROL © JaJyoDi

CAUSES FOR LAKE DEPLETION: INADEQUATE RAIN FALL INDUSTRIAL WASTES DIGGING OF BOREWELLS UNPLANNED URBANIZATION © JaJyoDi

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

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 BIOLOGICAL OXYGEN DEMAND 1.1mg/l 1 - 2 E.COLI 240 - CONTAMINATED WITH PATHOGENS CHLORIDES 25mg/l © JaJyoDi

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 CONSERVATION RESTORATION AND MANAGEMENT OF LAKES © JaJyoDi

LAKE PROBLEMS EUTROPHICATION – The ageing process SEDIMENTATION – Soils wash into the lake EXCESS ALGAE – Microscopic aquatic plants CONTAMINATION – Pollution from toxic substances © JaJyoDi

EXCESSIVE WEED GROWTH © JaJyoDi

DUMPED GARBAGE © JaJyoDi

CONSTRUCTION MATERIAL © JaJyoDi

DYING AND DECOMPOSING BLUE GREEN ALGAE BLOOM © JaJyoDi

BREEDING MOSQUITO LARVAE © JaJyoDi

DETAILED STUDYOF ULSOOR LAKE Size: 50 acres Current problems: EUTROPHICATION HYACINTH INFESTED WATER CONTAMINATED WITH SLIME UNCHECKED EFFLUENTS SEWAGE DISCHARGE UNPLANNED URBANISATION © JaJyoDi

REMEDIAL MEASURES DE-SILTATION DE-WEEDING PREVENTION OF SEWAGE/INDUSTRIAL WASTE © JaJyoDi

EFFECT OF INADEQUATE DISSOLVED OXYGEN © JaJyoDi

CONSERVATION DEVELOP AQUATIC LIFE PREVENT ENCROACHMENT CREATING BUFFER ZONES FOR LAKEPROTECTION LIMITING ANTHROPOGENIC ACTIVITIES SET UP AN INTERAGENCY REGULATORY BODY DEVELOPMENT OF WATER QUALITY DATABASE CONDUCT REGULAR WATER QUALITY MONITORING INVOLVE INSTITUTIONS AND COLLEGES INWATER QUALITY MONITORING CREATE PUBLIC AWARENESS. © JaJyoDi

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 © JaJyoDi

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 © JaJyoDi

MANAGEMENT Regular water quality monitoring Regular case studies Involving student associations and authorities © JaJyoDi

LOST LAKES NAME OF LAKE STATUS NOW Shoolay Lake Football Stadium Akkithimmanahali Lake Hockey Stadium Darmambudi Lake Kempegowda Bus Stand Challagatta Lake Golf Course Domlur Lake BDA Layout Nagashettihali Lake Space Department © JaJyoDi

RESIDENTIAL LAYOUT – ONCE KORAMANGALA LAKE © JaJyoDi

KEMPEGOWDA BUS STATION – ONCE DHARMAMBUDI LAKE © JaJyoDi

GOLF COURSE- ONCE CHALLAGHATTA LAKE © JaJyoDi

STADIUM – ONCE SHOOLAY LAKE © JaJyoDi

CONCLUSION Unplanned urbanization and growing population have taken their toll on wetlands. Sewage discharge and industrial effluents are the main sources of pollution. A collaboration of the society along with the responsible institutions should do the needful in order to do the necessary. © JaJyoDi

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

THANK YOU