Goulbi de Maradi ko Kogin Maradi ko Kogin Katsina kogi ne a kudu maso tsakiyar Nijar da arewacin tsakiyar Najeriya . Tsakanin tushenta kusa da Katsina a Najeriya, da ƙarshensa a Kogin Rima, Goulbi de Maradi bai taɓa gudana sama da 30 miles (48 km) daga iyakar Nijar –Najeriya. Kodayake yana da mahimmanci ga noma da kiwo, kuma yana ratsawa ta biranen Niger na Maradi, Guidan Roumdji, da Madarounfa, Goulbi de Maradi kogi ne na zamani kuma yana gudana ne kawai a lokacin damina. Karatun kogin Goulbi De Maradi a Madarounfa, 1954–1977, UNESCO . Suttie, JM, Thearfin noma na kiwo na Goulbi de Maradi da Kogin El Fadama (Niger). FAO - AGO; ESP. Maradi (Niger), Janairu 1985 Schembri, H., Ma'aunin matsin lamba da tasirin ruwa na tsarin phreatic na teburin ruwa na sama da na ruwa a cikin rafin Goulbi de Maradi da El Fadama. FAO - AGO; ESP. Maradi (Niger), Janairu 1985