Study of the Spatio-Temporal Changes of Hail Haor using Remote Sensing and GIS Techniques

Abstract

This paper has focused on the multi-temporal changes of the surface features of the Hail hoar wetland. The study was carried out using integrated technology of Remote Sensing (RS), Geographic Information System (GIS) and ground truth verification. Four sets of satellite data covering 1975-2014 time period were used for the study. The main wetland surface features identified in Hail hoar were water body and rice crops (Aman and Boro). The study revealed that the extents of all these surface features have been changed with specific trends. Extent of water area in dry season has been decreased and that in the wet seasons has been increased. The areas of Aman and Boro crops have also been changed with opposite patterns. These changes have upset the wetland characteristic of Hail hoar. Progressive increase of surface water in wet season made the hoar and its associate areas more vulnerable to flood. The decreasing tendency of dry season water area became alarming for the entire ecosystem of the haor region.