climate change and fisheries in bangladesh
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Climate Change and Fisheries in BangladeshTRANSCRIPT
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Abu Mostafa Kamal Uddin, Climate Change SpecialistUNDP
Bangladesh: Geographical position sets hydrological context Bangladesh: Geographical position sets hydrological context
Bangladesh: Country context and vulnerabilityBangladesh: Country context and vulnerability
Deltaic landscape, 1/3Deltaic landscape, 1/3rdrd of the country come under of the country come under regular monsoon floodingregular monsoon flooding
Around one fourth of the country under regular tidal Around one fourth of the country under regular tidal excursion excursion
92-93 % water from upper catchment 92-93 % water from upper catchment Over a million people depends directly on fish Over a million people depends directly on fish
resources resources Poor people dependent on aquatic resources by Poor people dependent on aquatic resources by
largelarge
19 districts, 147 upazilasPopulation 34.8 million in 2001,
41.2 in 2015 and 56.6 in 2050
BAGERHATBARGUNABARISALJHALAKATICHANDPURCHITTAGONGCOX’S BAZARFENIGOPALGANJ0JESSORE
BHOLAKHULNALAKSHMIPURNARAILNOAKHALIPATUAKHALIPIROJPURSATKHIRASHARIATPUR
IPCC , SREX 2011Temperature increaseRain fall erratic Dry days increaseHeavy spell of rainsWater shortages , droughtSalinity intrusion
Temperature and rain fall scenarios
•Annual avg Tmax increasing trend but increase over time will decline •Tmin gradual increase over time. •Rainfall in monsoon and post-monsoon will increase while rainfall in the dry season will remain closer to historical amount. •Rainfall in pre-monsoon shows erratic nature. •Rain fall increase 4, 2.3 and 6.7 % in 2030, 2050 and 2070, respectively (BUET, 2008).
NAPA 2009
Climate Change Impact: Observed in BangladeshClimate Change Impact: Observed in Bangladesh
5500 C, 2007, Jan in Jessore C, 2007, Jan in Jessore 44 44 00C, 1989 at Bogra.C, 1989 at Bogra. 290 mm in 6h, Dhaka, July 2009290 mm in 6h, Dhaka, July 2009 408 mm , Cht , June 2009408 mm , Cht , June 2009 Drought 2009, 21% less rain (June-August)Drought 2009, 21% less rain (June-August) Floods 2002, 2003, and 2004, 2007 (twice) Floods 2002, 2003, and 2004, 2007 (twice) Cyclone Sidr , Nargis, Rashmi, Aila Cyclone Sidr , Nargis, Rashmi, Aila cautionary Signal frequentcautionary Signal frequent salinity intrusion salinity intrusion Meghalaya rain fall in premonsoon increasedMeghalaya rain fall in premonsoon increased
Scenario Dry Season Monsoon Season
Fresh water area (<1 ppt)
Brackishwater area(>1 ppt)
Change Fresh waterarea (<1 ppt)
Brackishwater area(>1 ppt)
Change
Base(2005)
2,562,500 2,152,000 3,779,600 9,403
A2, 27cm[2050]
2,273,300 2441200 3,665,400 10,508 114200
A2, 62cm[2080]
2,135,700 2,578,800 426800 3,502,800 12,111 276,700
Changes in Fresh and Brackish Water Area [Ha] in Dry and Monsoon
Source: IWM and CEGIS, 2007 (NAPA 2009)
•Aquaculture infrastructure,•Pond siltation•Fish breeding habitat•Increase open water fisheries•Drought will affect fish growth, breeding & production,•Increase disease vulnerability•Reduce fishing season and reduce broods •Salinity intrusion and erratic rainfall
Adverse impacts of climate change
NAPA 2009
Knowledge gaps •Breeding conditions•Water retention in the
lowest pockets of water bodies•Fish schooling•Food availability•Habitat quality•Connectivity of wetlands •Etc
•Development and protection of dry season fish
refuges for sustainable management of fisheries
through community husbandry in the northwestern
part of Bangladesh
•Adaptation of fish culture techniques to increased
flood levels and diversification of aquaculture
techniques in the flood- prone north central region
of Bangladesh
Possible adaptation measures , NAPA 2009
•Development and protection of dry season fish
refuges for sustainable management of fisheries
through community husbandry in the northwestern
part of Bangladesh
•Adaptation of fish culture techniques to increased
flood levels and diversification of aquaculture
techniques in the flood- prone north central region
of Bangladesh
Possible adaptation measures , NAPA 2009
•Adaptation to flood on freshwater wetlands
(beel) fisheries with special emphasis to
recruitment of small indigenous fish species
•Adaptive measures for the fisheries resources
with the impacts of climatic changes in the
coastal ecosystem of Bangladesh
Possible adaptation measures , NAPA 2009
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