Summary on Extraction of Water Body from Remote Sensing Image and Flood Monitoring

Having features of wide observation range and periodic revisit, satellite remote sensing technology has already been widely applied by departments of water resources, environment protection, disaster prevention and relief. The author carries out a literature research on achievements of flood monitoring by remote sensing both home and abroad, provides a review of main methods for extracting water body from remote sensing image and flood monitoring application, including three parts of methods for remote sensing image segmentation, feature description of water body and flood monitoring application. Elaboration focuses on three processes of determination and classiflcation of information on water body, and flood monitoring application as well. The author also makes an analysis on problems of using remote sensing image at flood monitoring. Although there are still problems, with continuous development of high performance and precision satellite sensors, application of satellite remote sensing technology will have wide application prospect in water resources.