water Article A Spatial Analysis to Define Data Requirements for Hydrological and Water Quality Models in Data-Limited Regions Ersilia D'Ambrosio 1 , Anna Maria De Girolamo 2,*, Marinella Spanò 1, Vera Corbelli 3, Gennaro Capasso 3, Massimo Morea 3, Raffaele Velardo 3, Ossama M.M. Abdel...