Abstract: Lakes are natural buffers against flood disasters, and reservoirs are an important part of the modern flood control system. They work together to play an important role in flood control and disaster reduction. This paper selected the indexes of adjustable storage capacity and flood storage capacity for lakes and reservoirs, respectively, and built the flood storage capacity evaluation model to evaluate the flood control and storage capacities of lakes and reservoirs in Hubei Province, and analyze their spatial distribution patterns. The results are as follows:（1）The total flood regulation service of lakes and reservoirs is 416.02×108m3 in Hubei Province. The adjustable storage capacity of lakes is 79.69×108m3 and the flood control capacity of reservoirs is 336.33×108m3, contributing 19.16% and 80.84% of the total flood control capacity, respectively.（2）As for the flood storage capacity of lakes, the area with higher total capacities include Wuhan, Jingzhou, Ezhou, Huangshi, mountain regions of eastern Hubei and Jianghan Plain. While the per unit flood storage capacities of Ezhou, Huangshi, Xianning and Huanggang is  higher, with the value of 405.99×104、400.31×104、392.32×104 and 391.22×104m3/km2, respectively.（3）As for the flood storage capacity of reservoirs, the value of Yichang and Shiyan, located hilly regions of western Hubei, is 119.18×108m3 and 103.03×108m3, respectively, accounting for 66.06% of the total reservoir flood storage capacity in Hubei Province. While Ezhou, Tianmen and Shennongjia only contributes less than 1% of the total reservoir flood storage capacity.（4）The spatial distribution of total flood regulation service of lakes and reservoirs is consistent with that of flood storage capacity of reservoirs. When the composition of flood regulation service of lakes and reservoirs is considered, the amount of cities dominated by flood regulation service of lakes and reservoirs are similar. While the reservoirs play the dominant role in the flood control system of Hubei province, the role of lakes are also indispensable. In response to the problem of lake shrinking and reservoir disease spreading, the measures of returning farmland to lake and renovating and reinforcing reservoirs, as well as other effective measures that can improve flood regulation service, should be implemented. This study can provide scientific guidance for flood control construction of lakes and reservoirs in Hubei Province.
Key words：lakes; reservoirs; flood regulation service; spatial differentiation; Hubei Province