6. CONCLUSION AND RECOMMENDATION
The neural network model with back propagation algorithm carried out in the lower Songkhram
river basin, plays effectively role to extract the flood extent from SAR data. The efficiency
index of the model results is found to range from 86-91 %. The neural network model is
however still dominated by trial and error process in many aspects. It is important to mention
that the selection of training area significantly influences the output performance of the model.
More studies are encouraged to apply neural network models for extracting flood extent in other
river basins in Northeast Thailand such as Chi and Mun river basin.