The Kanwar Lake in Begusarai district is one of the Asia’s largest freshwater oxbow lake and eco-friendly natural lakes which attracts a variety of migratory birds. It has been shrinking at an abnormally high rate. Despite being designated as wildlife sanctuary, this wetland is under threat from anthropogenic pressures. An effort has been made in this study to conserve and manage wetland with remote sensing technology. Therefore multi-temporal satellite imagery used to quantify wetland dynamics and to estimate wetland loss.