Vietnam is divided into eight agroecological zones: North-West (NW); North-East (NE); Red River Delta (RRD); North-Central Coast (NCC); South-Central Coast (SCC); Central Highlands (CHL); South-East (SE); and Mekong River Delta (MRD). Climate, soil, and terrain conditions vary considerably across these zones, while the nature and severity of hydro-climatic risks differ across zones (Table 8). Hence, the study treats each of the eight agroecological zones plus the three larg- est river basins as separate units.