Operation Dispatching Feature Analysis Based on TELEMAC-2D

Abstract

China is in the stage of rapid urbanization, resulting in more and more serious urban waterlogging problems. Based on the TELEMAC-2D hydrodynamic model, this paper conducted mathematical modeling of Swan Lake flood storage and detention area in Dongying City, and simulated the inflow and inundation process of Swan Lake flood storage and detention area under three rainfall scenarios of typhoon “Rumbia”, “Lekima” and 50-year return period. The simulation results show that when three water intakes are opened at the same time (Plan A), the total amount of water inflow under typhoon “Rumbia”, “Lekima” and 50-year return period rainfall scenario is not exceeding the storage capacity, respectively. When only one water intake was opened (Plan B), the total incoming flow is not exceeding the storage capacity of Swan Lake flood storage and detention area. In all setting plans and rainfall scenarios, the maximum water level before sluice is 3.42m. By operating and dispatching the intake sluice in the flood storage and detention area of Swan Lake, the water level of Guangli River can be effectively controlled below 3.5m, ensure that the urban drainage system is not supported by the top and maintain the normal drainage function. In all setting plans and rainfall scenarios, the maximum flow of 1#, 2# and 3# water intake is not exceeding the design flow of corresponding water intake, respectively. The simulation results can provide a scientific basis for the operation regulation and flood control operation of Swan Lake flood storage and detention area.