Coastal areas in Bangladesh are at severe risk of inundation by sea-level rise (SLR). Effective adaptation plan requires information about extent and level of projected inundation, which is yet to be localized for Bangladeshi coasts. We used downscaled and bias-corrected temperatures from 28 global climate models to predict SLR around Bangladesh. Based on the extended semi-empirical approach to SLR modelling, this study shows that by 2100, temperature will increase by 1.7 °C (RCP4.5) to 4.4 °C (RCP8.5) relative to 1986–2005 (25.89 °C) and corresponding sea-level will rise by 0.77 m (RCP4.5) to 1.15 m (RCP8.5). The sensitivity of SLR to temperature over 1980–2100 is 2.13 to 3.75 mm/year/°C. Consequently, 2098 km² of Bangladesh is likely to be inundated under 1 m SLR, affecting the coast and river-banks with potential for significant indirect effects, including increased soil and water salinity and underground water contamination. This study provides modelled projection of SLR and inundation for the 21st century, and thus, it should provide useful information for adaptation planning and SLR preparedness in Bangladesh.

孟加拉国沿海地区面临海平面上升（SLR）淹没的严重风险。有效的适应计划需要有关预计淹没程度和水平的信息，但尚未在孟加拉国沿海地区进行本地化。我们使用来自28个全球气候模型的降温和偏差校正后的温度来预测孟加拉国附近的单反。基于对SLR建模的扩展半经验方法，该研究表明，到1986年（2005年）（25.89°C），到2100年，温度将上升1.7°C（RCP4.5）至4.4°C（RCP8.5）。相应的海平面将上升0.77 m（RCP4.5）至1.15 m（RCP8.5）。SLR对1980–2100年温度的敏感度为2.13至3.75 mm /年/°C。因此，2098 km ²孟加拉国的许多地区可能会在1 m SLR之下被淹没，从而影响海岸和河岸，并可能产生重大的间接影响，包括增加土壤和水的盐度以及地下水污染。这项研究为21世纪的SLR和淹没提供了模型化的预测，因此，它应该为孟加拉国的适应规划和SLR防范提供有用的信息。