Methodology on Defining Environmental Sensitivity Index for Settlement Area in the River-Basin, Coastal and Small Island

Environmental sensitivity index (ESI) defined by multiplying vulnerability index (VI), ecological index (EI) and socio-economic index (SI). Each components consist of a few vulnerability value (percentage number of houses near to the shoreline/riverine), ecological value (the capacity of the area supply freshwater to the community), and social value (number of population, toddlers, education, percentage access using waters to the settlement area) and economic value (income per capita per year).