In the field of map production

flood surveillance

and change study of lakeshore

the lake shoreline must be detected. A new method is explored in this paper

which can detect the lake shoreline in SAR images. Using this method

The edge points are detected by Mallat’ s Wavelet-based edge detection method firstly

and then the Gradient Vector Flow Active Contour Model is used to connect the edge points. The result of the experiment shows that method presented in this paper can restrain the interference of speckle noise

and detect the lake shoreline precisely.