The document presents a method for detecting estuary wetlands in SAR images using the spatial chaotic model (SCM). SCM models the fractal geometry of SAR signals using fractal dimension. Wetland areas like mud flats have lower fractal dimensions than other land types. The method estimates fractal dimension across the image then applies thresholding to the fractal dimension values to detect wetland pixels. It was tested on a SAR image of a nature reserve site containing sandy beaches, marshes and mud flats, with preliminary results finding mud flats were detectable using this approach.