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Bagerhat District

Local Gov

A coastal Sundarbans district where mangrove, tidal rivers, and brackish-water shrimp farming dominate the economy. Bagerhat holds vast permanent water and the country's largest single block of mangrove, but faces salinity intrusion, cyclone exposure, and one of the fastest bursts of built-up and economic expansion in the nation.

Indicators: Meta RWI (HDX); ERA5-Land; MODIS; Sentinel-5P; VIIRS night-lights; GHSL; Hansen v1.11; CHIRPS v2.0. Exposure: GloFAS v2.1, FABDEM, MODIS LST, ACAG PM2.5, WorldPop 2020.

Problems and issues

1. environment The district recorded 114.0 ha of tree-cover loss from 2001 to 2023, eroding a mangrove belt that was 1545.2 km2 in 2000, the natural storm buffer for the coast. So what: Every hectare of Sundarbans mangrove lost removes cyclone-surge protection and fish-nursery habitat that no engineered embankment fully replaces. Source: Hansen Global Forest Change v1.11 (UMD) via Google Earth Engine
2. water With 235.5 km2 of permanent surface water in a tidal delta, dry-season salinity intrusion pushes saline water far inland through rivers and shrimp ghers. So what: Salinization degrades drinking water and rice land, locking farmers into brackish shrimp monoculture and raising public-health and food-security risks. Source: JRC Global Surface Water (permanent water) via Google Earth Engine
3. climate disaster Annual rainfall of 1855 mm combined with low coastal elevation and 0.35 C warming leaves Bagerhat highly exposed to cyclones, tidal surge, and waterlogging. So what: Recurrent surge and waterlogging damage embankments, housing, and the shrimp economy, demanding continuous coastal protection investment. Source: CHIRPS v2.0 precipitation (UCSB Climate Hazards Group) via Google Earth Engine
4. economy Nighttime-light radiance grew 230 percent, the 5th-fastest of 64 districts, signaling rapid activity linked to Mongla port and Padma Bridge connectivity that is outpacing land-use planning. So what: Fast, unguided growth in a fragile coastal zone risks locking in development that worsens drainage, salinity, and mangrove pressure if not steered. Source: VIIRS nighttime lights (annual radiance) via Google Earth Engine
5. urbanization Built-up surface expanded 191 percent since 2000 to 27.0 km2, a near-tripling of settlement footprint on low-lying, flood-prone coastal land. So what: Construction on natural drainage and wetland increases waterlogging and exposes new assets to surge, raising future disaster losses. Source: GHSL built-up surface (JRC) via Google Earth Engine
6. poverty A Relative Wealth Index of -0.028 places Bagerhat 41st of 64, slightly below the national average despite recent activity growth. So what: Coastal wealth gains are uneven, so the salinity-hit rural population still needs livelihood diversification beyond shrimp. Source: Meta Data for Good Relative Wealth Index (HDX), ~2.4 km grid

Probable solutions

• Strengthen co-management and reforestation of the Sundarbans buffer zone with community patrols against illegal felling and gher encroachment. Responsible: Bangladesh Forest Department · Sundarbans Reserved Forest co-management program
• Rehabilitate coastal polder embankments and sluice gates and expand managed tidal river management to flush silt and reduce salinity intrusion. Responsible: Bangladesh Water Development Board · Coastal Embankment Improvement Project
• Scale rainwater harvesting, managed aquifer recharge, and desalination points to secure dry-season drinking water in saline-affected unions. Responsible: Department of Public Health Engineering · policy proposal
• Embed coastal-resilient land-use zoning and drainage standards into Mongla and Padma Bridge corridor planning before new construction. Responsible: Local Government Engineering Department · policy proposal

Upazilas (9)