ESPA deltas study area map. In ESPA deltas study, 4 Social-ecological Systems (SES) were matched with major land-use types: Aman, Boro, Bagda and Golda SESs. Unions falling in these SES were defined by greater than 80% land coverage of each of these land uses, adjusting for mudflats, river canals, sand, rural and urban settlements, water bodies nd water logged land areas. 3 SES are not directly identifiable by specific land use type, but spatial environmental characteristics. Sundarban dependent SES includes all unions contiguous with the Sundarban. Marine unions are all sea facing unions and Char unions are defined as any union that has the presence of riverine chars (Adams et al., 2016). DOI: https://doi.org/10.1525/elementa.143.f1