2021

Geomorphic change in the Ganges– Brahmaputra–Meghna delta

More than 70% of large deltas are under threat from rising sea levels, subsidence and anthropogenic interferences, including the Ganges–Brahmaputra–Meghna (GBM) delta, the Earth’s largest and most populous delta system. This review describes GBM delta dynamics, examining these changes through the Drivers– Pressures–States–Impacts–Responses framework.

River pollution and social inequalities in Dhaka, Bangladesh

This study seeks to understand the socio-spatial and seasonal inequalities in pollution risks in Dhaka, Bangladesh. The authors designed a direct observation method to record people’s daily river use activities across dry and wet seasons, complemented by monthly monitoring of river water quality, heavy metal and biotoxicity assessment a large-scale household survey along a 25km stretch of the Turag River and Tongi Khal in Dhaka, Bangladesh.

Water Security for Climate Resilience Report

This report presents a synthesis of published and ongoing research by REACH which explores the relationship between water security, climate and climate adaptation decisions. The report draws on findings from REACH research conducted in Sub-Saharan Africa and South Asia. 

Petrography and Geochemistry of the Rocks in Lodwar, Kenya and their Influences on Groundwater Quality

This paper evaluates the influence of rock chemistry on groundwater quality in the region of Lodwar County, Kenya. Rock geochemistry influences groundwater quality and the aquifer processes of an area. Therefore, this study used conventional petrography and geochemistry techniques to measure the mineralogical compositions of 69 rock samples. The geological study area comprised of quartzo-feldspathic gneiss and biotite gneiss of the Precambrian basement, as well as sedimentary Turkana Grits and Holocene sediments, Tertiary volcanics comprising nepheline phonolites and augite basalts, alluvial deposits along the banks of major Streams and laggas. Quaternary sands also blanket much of the area. The results demonstrate that that geological factors and processes have location-specific influence on groundwater quality. These should be considered in aquifer water-quality studies and supply development across Africa’s vast ASAL regions.

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