bangladesh coast

bangladesh, social

very dense pop, LI country

bangladesh, physical

worlds largest delta, monsoonal, 70% of land less than 1m above sea level, frequent storm surges due to cyclones, river (ganges) flooding, sediment build up (raised river beds which overflow), sea level rise by 1m by 2100, tectonic uplift of himalayas increases river sediment

bangladesh, hard engineering

embankments 600km long poorly maintained

bangladesh, soft engineering and community adaptations

mangrove restoration, cyclone sheltered, early warning systems, floating gardens (year round for food production)

bangladesh, human causes for severe impacts

deforestation of 25% of mangroves for shrimp farming although helps local economy, poor infrastructure, poverty, inadequate flood defences

bangladesh, mangroves and cyclone

they are a complex ecosystem for biodiversity and stabilise the coast line, they protected from cyclone sidr, coastline retreats by 20m a year due to mangrove deforestation

bangladesh, embankments

they cause todal flows to funnel pushing water further inland and increasing tidal range, they should be placed further back up the estuary to reduce the funnelling effect but would use up land, they want to spend $400 million to upgrade the embankments