Abstract: The practice of water resources allocation constantly advances in these days. Accordingly,the concept,connotation,principles and methods of the water resources allocation are gradually enriched. All these facilitate the solution to the coexisting problems of the seasonal,development-induced and quality-induced water shortage in wet areas of Dongjiang Baisn1 Hence,Focused upon the quantity of water intake and pollutant discharge in low-flow period,this paper makes the first attempt to propose a water resources allocation model based on the dual-control of water quantity and quality which may serve as the theoretical and practical reference to the scientific management and the allocation of water resources in water-rich areas in South China. The investigations of the relevant principles,indexes and methods are also involved in the study of the model.