Saline intrusion in the Ganges-Brahmaputra-Meghna megadelta
نویسندگان
چکیده
In the fertile Ganges-Brahmaputra-Meghna (GBM) delta, which spans boundary from West Bengal in India and Bangladesh, availability of freshwater is crucial to subsistence livelihoods protected ecosystems. Controlled by large tides widely variable river discharge, delta experiences rising salinity salt intrusion, as well seasonal flooding during monsoon. Future climate change projected increase rainfall South Asia discharge GBM system. We address how this process might combine with sea-level rise (SLR) control future salinity. Model experiments designed using a range SLR scenarios are performed investigate forces controlling delta. A flexible mesh modelling approach allows us impacts at wide time space scales. projections disparity between wet dry season intrusion intensifies. future, acts During season, effect worsened reduced discharge. can be mitigated eastern part larger flows. The central western dominated SLR, leading increased all year round, impacting on water resources agricultural productivity. context an intensifying hydrological cycle, these conclusions have implications for similar tide-dominated deltas, where tidal range, therefore exacerbate intrusion.
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ژورنال
عنوان ژورنال: Estuarine Coastal and Shelf Science
سال: 2021
ISSN: ['1096-0015', '0272-7714']
DOI: https://doi.org/10.1016/j.ecss.2021.107246