Simu Akter

Why Are Bengal Delta Water Resources a Global Concern?

Millions of people across the Bengal Delta still lack reliable access to clean and safe drinking water, representing one of the most pressing freshwater security challenges in the world. One of the most significant and pervasive threats to freshwater availability and quality in this region is salinity, which manifests through multiple interconnected pathways, including natural seawater intrusion driven by tidal forcing and sea-level rise, saltwater ingress through coastal embankments and drainage channels, and anthropogenic salinization associated with large-scale shrimp aquaculture and agricultural irrigation practices. These compounding salinity pressures, combined with rapid population growth, inadequate water treatment infrastructure, and the escalating impacts of climate change, collectively render the Bengal Delta one of the most hydrologically vulnerable and water-stressed coastal regions in the world, with profound implications for public health, food security, ecosystem integrity, and socioeconomic development for the millions of coastal inhabitants dependent on these water resources.

Goals

The Delta Project investigates how pollution and contamination of river water and groundwater evolve over time in the Bengal Delta. To date, limited research has examined how the extent of pollution and contamination, as well as their underlying causes, change over time across these hydrologically complex and vulnerable coastal systems. Based on the analysis of these processes, the project additionally aims to evaluate how climatic changes and human activities may influence ionic concentrations and water quality in the future, with the ultimate goal of informing evidence-based and sustainable water resource management strategies for the Bengal Delta region. To achieve these goals, researchers from Germany and Bangladesh are collaborating on this interdisciplinary project. The research team combines expertise in hydrology, hydrogeology, geochemistry, and environmental modelling to provide a comprehensive and integrated understanding of the hydrochemical dynamics governing river water and groundwater quality across the tidal river catchments of the Bengal Delta.

Contributions

The Hydrology and Substance Balance team, comprising Prof. Dr. Matthias Gaßmann and Simu Akter, brings expertise in the fields of hydrology and hydrogeology. Utilizing hydrology and hydrogeology data, the team investigates the dynamics of river pollution and nutrient cycling across the tidal river catchments of the Bengal Delta. The team also quantifies the surface and groundwater ionic balance in the delta using various primary and secondary data sources to gain comprehensive insights into water quality status and hydrochemical variability across the study area. The derived information is subsequently integrated with numerical models and analytical tools to better understand pollution and contamination patterns in the tidal rivers and their adjacent groundwater systems, ultimately contributing to the development of evidence-based water resource management strategies for the Bengal Delta region.