Impacts of climate change on coastal ecosystems of Bangladesh

Hossain, Peerzadi Rumana

doi:10.18174/443420

Cited by 2 publications

(1 citation statement)

References 75 publications

(126 reference statements)

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“…Periodic erosion and accretion, as well as internal changes in delta systems, are common and they can balance themselves if the systems are undisturbed, but erosion has been dominant over the last three decades, especially along the southwestern coast of the delta (Figure 1). Ahmed (1999) proposed that most of the coastal erosion was caused by both continuous wave action and storm surges, and that the rate of erosion increased with increasing wind speed (Figure 2(a); Hossain, 2012). The coast of Bangladesh has shallow offshore bathymetry.…”

Section: Introductionmentioning

confidence: 99%

Coastal development in southwestern Bangladesh: understanding the interplay between storms and sea level rise

Haque

Ghosh

Hoyanagi

2021

Progress in Physical Geography: Earth and Environment

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Sea-level rise and sediment supply have influenced coastal morphology and sedimentation on Bangladesh’s southwestern Ganges‐Brahmaputra‐Meghna (GBM) delta coast. Satellite images and geological core from the Haringhata coastal region were analyzed to explain the morphological changes and to understand the influences on deposits. The results derived from satellite images indicate that the southern coastline experienced a retreat that ranges between 2.3 and 2.9 km. In contrast, the eastern and western coastline advanced. The erosion and accretion ratio was 0.29 from 1977 to 1989, while the ratio was higher 2.90–4.77 from 1989 to 2020. Two sedimentary facies were identified using 130 cm thick successions. A parallel to wavy laminated bluish gray mud facies of deeper part was deposited in a marine-influenced environment. A planar to hummocky cross stratified, gray to grayish white silty sand facies of storm overwash deposits overlies the mud facies with sharp contacts. Unimodal to bimodal grain distributions of sandy sediments suggest two sources: sand derived from the beach and mud carried by adjacent tidal rivers and resuspended offshore sediment. Coastline dynamics and sedimentation of the area were influenced by inequality of accommodation and sediment supply ratio in the river mouth. This occurs due to sea-level rise and deficit in upstream water and sediment discharge. Morphological change along the southwestern GBM delta coast was not only caused by wave energy, but also by rising sea levels which shifted sediment accommodation space landward.

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Section: Introductionmentioning

confidence: 99%

Coastal development in southwestern Bangladesh: understanding the interplay between storms and sea level rise

Haque

Ghosh

Hoyanagi

2021

Progress in Physical Geography: Earth and Environment

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Developing Climate Information Services for Aquaculture in Bangladesh: A Decision Framework for Managing Temperature and Rainfall Variability-Induced Risks

Hossain

Amjath-Babu

Krupnik

et al. 2021

Front. Sustain. Food Syst.

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Climate information services (CIS) are increasingly in demand to assist farmers in managing risks associated with climate variability and extremes experienced in food production. However, there are significant gaps in the availability and accessibility of these services, especially in aquatic food production in developing countries. In response, this study aims to generate the background knowledge for developing climate information and decision support services tailored for aquaculture farmers in Bangladesh. We surveyed 800 fish-farming households, interviewed 30 key informants, and conducted a systematic literature review to identify climate-sensitive operations and management decisions in aquaculture and to document fish-farmers' awareness of the relationships between climate variability and aquatic food production systems. We also sought to identify the lead time and communication method(s) needed to deploy forecasts effectively and prepare aquaculture farmers to act in response to the forecasts. A fish-farming activity calendar was developed that identified high temperature, cold spell, heavy rainfall, and dry spell events as key climatic phenomena affecting year-round aquaculture operations, including pond preparation and maintenance, fingerling stocking, grow-out management, and harvesting. We also identified five climate-sensitive management decision points and 26 potential advisories in line with specific climate variability to manage induced risks in the day-to-day operations of fish farmers. Finally, the research team developed a decision framework based on the temperature and rainfall thresholds for the grow-out phase of four widely cultivated and economically important fish species in Bangladesh. This innovative decision support approach is to our knowledge the very first endeavor to develop CIS using species-specific temperature and rainfall thresholds to reduce climate risks and ensure resilience capacity for South Asian aquaculture system.

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Impacts of climate change on coastal ecosystems of Bangladesh

Cited by 2 publications

References 75 publications

Coastal development in southwestern Bangladesh: understanding the interplay between storms and sea level rise

Coastal development in southwestern Bangladesh: understanding the interplay between storms and sea level rise

Developing Climate Information Services for Aquaculture in Bangladesh: A Decision Framework for Managing Temperature and Rainfall Variability-Induced Risks

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