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广州市和西、北江三角洲的防洪方针是泄蓄兼施,以泄为主。即在上中游建库蓄洪,下游三角洲固堤防洪,入海尾闾整治畅泄,以建立捍卫广州市和西、北江三角洲的完整防洪体系。北江飞来峡水库控制北江流域4.67万平方公里中的3.4万平方公里,即占73％;西江龙滩和大藤峡两库分别控制梧州以上流域面积31.5万平方公里中的9.9和19.0万平方公里,即分别占31.4％和60.3％。故飞来峡和龙滩、大藤峡三库,特别是龙滩、大藤峡二库非但综合利用性能好,并且是广州市和西、北江三角洲的无可替代的控制性防洪水库。飞来峡水利枢纽可行性研究初步报告
Flood control policies in Guangzhou, the west and the Beijiang Delta are to relieve both risks and expenditures, mainly to vent floods. That is, building flood storage and storage in the middle and upper reaches of the upper reaches of the Yangtze River, flood control in the lower reaches of the delta and rectification of floods to the tail of the sea in order to establish a complete flood prevention system that will safeguard Guangzhou and the west and north reaches of the Yangtze River. The Beijiang Feilaixia Reservoir controls 34,000 square kilometers of the 46,700 square kilometers of the Beijiang River Basin, accounting for 73% of the total; and the two banks of the Xijiang Longtan and Odengxia Gorge respectively control 9.9 and 190,000 square kilometers in the 315,000 square kilometers of the watershed above Wuzhou, , Accounting for 31.4% and 60.3% respectively. Therefore, Feilaixia and Longtan, the Big Three Gorges Reservoir, especially the Longtan and Big Tengxia reservoirs, not only the comprehensive utilization performance is good, and it is an irreplaceable controlled flood control reservoir in Guangzhou, the west and the Beijiang Delta. Feilaixia Water Control Feasibility Study Preliminary Report