Mangrove wetland ecosystems in Ganges-Brahmaputra delta in Bangladesh

Abstract

The Sundarbans is one of the productive mangrove wetland ecosystems in the Ganges-Brahmaputra delta in Bangladesh. The delta is undergoing rapid ecological changes due to human activity. In the present study, surface water salinity data from 13 rivers of the Sundarbans were collected in order to investigate the saline water intrusion in the mangrove wetlands. Results demonstrate that saline water has penetrated the upstream area as river water salinity has increased significantly in 1976 compared to the year 1968. The soil and river water salinity data also shows that it has crossed the water salinity threshold line in most parts of the Sundarbans wetlands. These observations are due to the construction of Farakka Barrage in 1975, which reduced the water discharge of the Ganges River from 3700 m³/s in 1962 to 364 m³/s in 2006. The shortage of freshwater discharge to the deltaic area is trailing active ecosystems function, especially in the dry season in the south western region in Bangladesh. The objective of this study is to understand and analyze the present degraded mangrove wetland ecosystems and their negative impacts. The findings of this study would contribute to the formulation of the mangrove wetland ecosystems management plan in the Ganges delta of Bangladesh.

References

1. Anon. (1995). Integrated resource management plan of the Sundarbansreserved forest vol 1. Draft final report of FAO/UNDP projectBGD/84/056–integrated resource development of the Sundarbansresource forest, Khulna, Bangladesh, 385 2. Bagchi K G (1944). The Ganges Delta. Calcutta: Calcutta University Press, 1–25 3. Barbier E B (1993). Sustainable use of wetlands valuing tropical wetlandbenefits: Economic methodologies and applications. The Geographical Journal, 159(1): 2–52 4. Begum K (1987). Tention Over the Farakka Barrage _a Techno PoliticalTangle in South Asia. Dhaka: University Press Limited, 279 5. Blower J (1985). Sundarbans forest inventory project, Bangladesh. Wildlifeconservation in the Sundarbans. Project report 151. OverseasDevelopment Administration, Land Resources Development Centre, Surbition,UK, 39 6. Coleman J M (1974). Deltaic Evolution, the Encyclopedia of Geomorphology. In: Fairbridge R W (ed .,), New York, USA, 252–255 7. Colugh B F (1985). Factors Regulating Mangrove Ecosystem Primary Productivity. Proceedings of the UNDP/UNESCORegional Project RAS/79/002 Workshop on Mangrove Ecosystem Dynamics,Papua New Guinea.79–85 8. EGIS–Environmental. and Geographical Information Studies. (2000). Bangladesh Water Development Board-Environmental baselineof Gorai River restoration project. (EGIS-I, EGIS-II, and EGIS-III). Environment and GIS support project for water sector planning, Ministryof Water Resources, Government of the Peoples Republic of Bangladesh,EGIS, Dhaka, 190 9. Elahi K M, Das S C, Sultana S, et al. (1998). Geography of Coastal Environment:a Study of Selected Issues. In: : BayesA, Mahammad A, Bangladesh at 25, an analytical discourse on development . Dhaka: The University Press Limited, 336–368 10. Hasna J M, (1995). Women for Water Sharing. Dhaka: Academic Publishers, 1–136 11. Hassan M, Rahman M S, Haider Z M, et al. (2001). Some Facts and ObservationsRelated to Salinity and the River System of the Sundarbans MangroveForest. Paper presented at 1st national conference on theSundarbans at Khulna University. 14-16 February, Khulna. Bangladesh,1– 4 12. Husain K Z (1995). The Farakka Catastrophe Reflectiona. In:: Hasna J M, (ed .,) Women for Water Sharing. Dhaka: Academic Publishers, 71–72 13. Hussain Z, Acharya G (1994). Mangroveof the Sundarbans, Vol 2, Bangladesh. IUCN–Bangkok. Thailand: Dyna Print Ltd, 1–209 14. Islam S N (2003). Sustainable Eco-tourism as a Practical Management Policy. Dhaka: AHDevelopment Publishing House, 34–47 15. Islam S (2006). Banglapedia: Ganges-Padma River System, National Encyclopaediaof Bangladesh, Asiatic Society of Bangladesh. Asiatic civil MilitaryPress, Dhaka. 16. Joseph P S (2006). The Environmental Management Do Better Supply of FreshWater in Transboundary River: The Ganges Could Run Dry.In: : Perez J G (ed.,). Proceedings of III International Symposium on Transboundary WaterManagement–Overcoming Water Management Boundaries. Ciudad Real: Universidad de Castilla-La Mancha, 1–101 17. Katebi M N A (2001). Sundarbans and Forestry. In: : Haider (ed.,). Cyclone'91–AnEnvironmental and Perceptional Study. Dhaka: BACS, Dhaka, 79–100 18. Khan S M, Haq E, Huq S, et al. (1994). Wetlands of Bangladesh.Bangladesh Centre for Advanced Studies (BCAS). Dhaka: Holiday Printers Limited, 2–57 19. Miah M (2003). Hydro-politics of the Farakka Barrage. 20. Nishat A (2006). Water at Farakka Barrage in 2006. 21. Rob M A (1998). Changing morphology of the coastal region of GangesDelta. Oriental Geographer, 41(2), 1997. Dhaka: Dhaka University, 49–64 22. Seidensticker J, Hai M A (1983). The SundarbansWildlife Management Plan, Conservation in the Bangladesh Coastal Zone. IUCN, Gland, Switzerland, 1–20 23. UN ESCAP-United Nations/Economic and SocialCooperation for Asia and the Pacific (1988). Coastal environmental management plan for Bangladesh. UNESCAP, Bangkok, Thailand, 2–25 24. Zube E H (1986). Landscape values: History, Concepts and Applications. In: : Smardon P, and Felleman (eds.,). Foundations forvisual project analysis. New York: John Wilay & Sons,USA, 4–19