To explore a new flood control scheme adapting to the current flood pattern, the flood control scheme for “flood discharge from the nearer route” is proposed based on studying the current flood pattern. The effect of river dredging of nearer route on the flood discharge is quantitatively calculated based on the hydrodynamic model for river network in the Pearl River Delta. The results show that the discharge of Modaomen is the largest and the discharge path of Yamen is the shortest in the west four estuaries. Jiaomen had the largest discharge, and its discharge path is also the shortest in the east four estuaries. After the channel dredging, the discharge of Yamen which is the one of the west four estuaries increased by 2. 805×10⁵ m³, and the distribution ratio increased by 0. 50%. The discharge rate of Jiaomen and Humen in the east four estuaries increased by 1. 11 ×10⁵ m³ and 1. 537×10⁵ m³, with a distribution ratio of 0. 20% and 0. 27%, respectively. The flood control scheme has achieved the expected effect, which can provide technical support for the implementation of the Pearl River Delta flood control program.