Evaluation of different methods for delineation of wetlands in Limpopo River Basin using Landsat ETM + and SRTM data - Kulawardhana, Wasantha; Thenkabail, Prasad S.; Masiyandima, Mutsa; Biradar, Chandrashekhar M.; Vithanage, Jagath; Finlayson, C. Max; Gunasinghe, Sarath; Alankara, Ranjith (2006)