development & disasters (focus on water) a bahamian perspective cyprian a. gibson civil...
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DEVELOPMENT &DISASTERS (FOCUS ON WATER) A Bahamian Perspective
Cyprian A. GibsonCivil Engineer, M.B.A., C.ENG., M.I.C.E.
Water & Sewerage Corporation Nassau Bahamas
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OUTLINE OF PRESENTATION
BACKGROUND – Caribbean & UtilitiesTHE BAHAMAS, WSCNATIONAL DISASTER COMMITTEWSC – DISASTER PLANCASE STUDIESISSUES/LESSONS LEARNTQ&A
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BACKGROUND -THE CARIBBEAN General Geographic Region, Climates, etc Similar Histories, Governments, Infrastructure, and
Philosophies that have grown out of colonialism. Individually isolated, but strategically placed to tap
into the global markets of North and South America. People have similar socio-economic and educational
backgrounds, while yet very diverse. Small economies built on agriculture, light
manufacturing, tourism and banking.
THESE AFFECT PREPAREDNESS/RESPONSE
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BACKGROUND -CARIBBEAN UTILITIES
Cash Starved - Our water utilities are for the most part cash starved, and undercapitalized, and highly reliant on Governments – Boards, Subsidies, etcIsolated from major suppliers (high shipping costs)Serve similar customers, with increasing quality expectations & Similar Levels of TrainingSimilar Approach to Infrastructure – Supplied from wherever we can get it – International Lending AgenciesDiverse in Technologies, Diverse in Operations, therefore requiring Appropriate TechnologyFocus on Survival v/s Long term Planning (Capacity)Collection, Treatment, Storage, Distribution, WW
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BACKGROUND –THE COMMONWEALTH OF THE BAHAMAS
ACHIPELLAGO - More than 700 Islands and Keys- Off the Coast of the Southern U.S.
POPULATION OF 300,000 - Only 40 plus Islands with communities- More than 80% in New Providence & Grand BahamaTOURISM DRIVES ECONOMY - 60% of GDP
4 Million plus Visitors, Hotel RoomsBanking/Trust is second – 400 plus
PARLIAMENTARY DEMOCRACY2 Major Parties, 40 Electoral Seats
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WATER RESOURCESTHE COMMONWEALTH OF THE BAHAMAS
Geology Carbonate of
Holocene and Pleistocene age
Formed at sea level shaped by wind, water and waves in geological times, Bahama Bahama marmar
Hydrogeology Freshwater
lenses float on seawater
Elevations 80 % within 5
feet of mean sea level
80 % within 5 feet of mean sea level
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RAIN
SEASEA
WATER
AERATED ROCK
HIGHLY SALINE WATER
Diagram of a Freshwater Lens in an Oceanic Island(Like The Bahamas)
BRACKISH
FRESHWATER LENS INSATURATED ROCK
LOSSES TOEVAPOTRANSPIRATION
RUN OFFTO THE SEA RECHARGE
Water Resources of The BahamasThe groundwater resources of the Commonwealth comprise the
fresh, brackish, saline and hypersaline waters found in the near and deep subsurface and in the lakes and ponds that intercept the surface.
The freshwater resources occur as three-dimensional lens-shaped bodies, which overlies brackish and saline waters at depth. It is inappropriate to conceive of these Ghyben - Hertzberg lenses as occurring in subterranean lakes, rivers or ponds.
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THE WATER & SEWERAGE CORPORATIONESTABLISHED IN 1976 – BY ACT OF PARLIAMENT –
Responsible statutory body for Water Supply and Sewerage Sector for: Development, Management, and Protection of National Water Resources;& provision of adequate supplies of suitable water for domestic and industry use, and the subsequent collection, treatment and disposal thereof STAFF OF 400, REVENUE OF $32Mn., EXPENSES $37Mn. US.450 MILES MAINS, 6 INTERCONNECTED SITES
- New Providence MANY SMALL AND DIVERSE SYSTEMS – Family IslandsAVERAGE WATER PRODUCTION - NASSAU (8 MIGD)
12 FAMILY ISLANDS (2 MIGD) 10 % SEWERAGE COVERAGE (90% Onsite Septic Systems)
7 Major Sewerage Facilities on New Providence onlyPrimary & Secondary Treatment with Deep Well Disposal
OTHER SECTOR PLAYERSHOTELS – Primarily self served (Small R.O. & WWTP)OTHER UTILITIES – Freeport, P. I. Utilities, NPDC
PRIVATE WELL SUPPLIES, SEPTIC TANKS
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THE BAHAMAS & NATIONAL DISASTERSTHE BAHAMAS NATIONAL DISASTER ORGANIZATION
The Bahamas National Disaster Organization was established in April 1991 to replace the National Hurricane Committee (1971) and placed under the portfolio of the Office of the Prime Minister
It was prompted by the devastation that was caused by hurricanes Gilbert and Hugo which highlighted the need for a national organization to assist the country in preparing for national disasters, be they be they from man-made or natural causes.
STRUCTURE (Focus on Hurricanes)DISASTER ADVISORY COUNCIL – Comprised of Members of Cabinet and Chaired by the Prime Minister DISASTER MANAGEMENT COMMITTEE – Comprised of Senior Officials of Relevant Government & Emergency Services
Health, Public Works, Ports (Air/Sea) , Utilities, Police, RBDF 2 notable Private Institutions (Red Cross & Salvation Army) Chaired by the Secretary to the Cabinet
DISASTER PREPAREDNESS OFFICE – Located in Cabinet Office, and acting as a Secretariat with a CoordinatorSTANDING EMERGENCY SUB – COMMITEES
Public Awareness, Disaster Training, Family Islands, Relief/Supplies Emergency Communications, Shelters, Search & Rescue, Evacuation/Transportation, Damage Assessment, Response/Recovery
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DISASTER PREPAREDNESSTHE WATER & SEWERAGE CORPORATION(FOCUS ON HURRICANES)
WSC - A TYPICAL WATER UTILITYWELLFIELDS/SUPPLY SOURCETREATMENT/STORAGE TANKSPUMPING STATIONSDISTRIBUTION MAINS (UNDERGROUND)SERVICE CONNECTIONS
PlusTANKERING OPERATIONSSEWERAGE COLLECTION, TREATMENT, DISPOSAL
MOST COMMON DISASTERS TO DATE
HURRICANES & FOREST FIRESBAD WEATHER (BARGING)POSSIBLE UNION TAMPERING – SHORT TERM
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DISASTER PREPAREDNESSTHE WATER & SEWERAGE CORPORATION(MITIGATION MEASURES - HURRICANES)
HURRICANE PREPAREDNESS PLAN –WATER IS CRITICAL 1. INTRODUCTIONS/DEFINITIONS/WARNING SYSTEMS2. PREPARATIONS FOR HURRICANE SEASON3. ACTIONS FOR HURRICANE ALERT (60 HOURS)
New Providence & Family Islands4. ACTIONS FOR HURRICANE WATCH (36 HOURS)5. ACTIONS FOR HURRICANE WARNING (24 HOURS)6. ACTIONS DURING & IMMEDIATELY AFTER HURRICANE7. COMPOSITION OF COMMITTEE8. STATIONS TO BE PROTECTED 9. SCHEDULES OF STANDBY EQUIPMENT10. SCHEDULES OF CONTACTS
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DISASTER PREPAREDNESSTHE WATER & SEWERAGE CORPORATIONMITIGATION MEASURES - HURRICANES
SPECIFIC MITIGATION/PREPAREDNESS INITIAVES MAJOR HAZZARDS – Rains, Flooding, Waves/Surges, Trees
PREPARATIONS FOR HURRICANE SEASON Building Checks, Standby Equipment, Inventories, Volunteers, HQ
ACTIONS FOR HURRICANE ALERTS & WATCHES (>24 HOURS) Fill Tanks, Public Announcements,Chlorine, Bulk Meter Readings
ACTIONS FOR HURRICANE WARNING (<24 HOURS)Water - Turn off supplies, power, secure, meter readings,
Sewerage - Pump Down Sewer Lift Stations, => SIT TIGHT
AFTERWOODS – Inspect, assess, test, repair, commission
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DISASTER PREPAREDNESSTHE WATER & SEWERAGE CORPORATION(CASE STUDY)
HURRICANE FLOYD
BACKGROUND – September of 1999, Entire Bahamas (7 Islds.)IMPACTS (WSC) – Power Loss, Leaks, Wellfields, Storage Tanks
- Due to excessive winds, flooding, surges TOTAL LOST $880k
NEW PROVIDENCE $400kFAMILY ISLANDS
ANDROS $200kABACO $80kELEUTHERA $200kGRAND BAHAMA seawater intrusionCAT ISLAND (operations disrupted)AN SALVADOR (operations disrupted)
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DISASTER PREPAREDNESSTHE WATER & SEWERAGE CORPORATION(CASE STUDY)
HURRICANE FLOYD – LONG TERM EFFECTS
REQUIRED CORRECTIVE/CAPITAL IMPROVEMENTS
TOTAL $750kNEW PROVIDENCE $250kFAMILY ISLANDS
ANDROS $100kABACO $100kELEUTHERA $250kGRAND BAHAMA (outside service area)SAN SALVADOR $50k
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HURRICANE FLOYDCASE STUDY – LESSONS LEARNT
Water is still critical to life!!! – Hospitals, Drinking, Washing
STANDBY POWER IS CRITICALSEA DAMAGE/SURGES – Water Resource, Tanks on CoastVULNERABILITY OF OTHER STRUCTURES
(GLASS WINDOW BRIDGE, ROADS, ELECTRICITY)FULL STORAGE TANKS, CHLORINE RESERVESPROTECT WELLFIELDSCOMMUNICATION ARE CRITICAL (LOCAL & NATIONAL)IMPROVED NATIONAL COORDINATION, LIST OF OFFICIALSNEED TO IMPROVE ON WSC PLANSEDUCATE & TRAIN CONSTANTLY – (STAFF & PUBLIC)HURRICANES DAMAGE WEAK/ANTIQUATED WORKSMODERNIZATION/CAPACITY BUILDING (CAPITAL WORKS)
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QUESTION & ANSWERS ?
Cyprian A. GibsonCivil Engineer, M.B.A., C.ENG., M.I.C.E.Water & Sewerage Corporation Nassau Bahamas
DEVELOPMENT &DISASTERS (FOCUS ON WATER UTILITIES) A Bahamian Perspective
DISCUSSIONS & FEEDBACK