Methodologies for mapping abandoned wetland in tropical region

Abstract

Wetland development for food crops relies upon the good management related to the condition of canals, ditches, and water-gate, which determine the crop productivity and prosperity. Abandoned wetlands will created shrubs and bush. Revitalizing abandoned land means rebuilding infrastructure and re-clear wetland and requires valid spatial data to provide its proper planning. This study proposes a method to map abandoned wetland to gain sufficient information in supporting inventory and revitalization program in various scale. The methods include (1) dataset preparation by collecting historical satellite imageries, historical land use map, the boundary of previous wetland usages; (2) preliminary map preparation covering digital image processing, satellite image interpretation, overlying analyses of previous maps with infrastructure map, base, and land tenure map; (3) ground sampling survey to evaluate preliminary map and collecting biophysical and socio-economic data; (4) validation using accuracy test and statistical analysis; and (5) geo-visualization and tabulation for improving preliminary map and calculating abandoned map distribution. The activity will produce the vegetation indices and landuse map by various methods and will be analysed using statistical analysis after ground sampling survey. The result showed that map of biophysical and socio-economic characteristic were prominent to provide basic spatial data for abandoned wetland revitalization