In order to further construct the synergistic evaluation guidelines of cross-regional flood control and drainage standards, and to provide scientific basis for the synergistic design of cross-regional flood control and drainage standards, a set of synergistic evaluation guidelines of cross-regional flood control and drainage standards is developed based on the master-slave game. Based on the master-slave game to establish the decision-making information feedback game model between different districts and counties, to form a set of synergistic evaluation guidelines for flood prevention and removal in each district and county, which is used to equalize the conflict of interest of drainage between districts and counties, using the model of the Taihu Lake Basin, with the Yangtze River Delta Eco-green Integration and Development Demonstration Area as the research object, to set up a series of flood prevention and removal programs, using the 1999 southern-type design rainstorm in the Taihu Lake Basin as the input, and using the Taihu Lake model run simulations to obtain water level data, evaluate the synergy of flood prevention and removal capabilities between cities across regions under different scenarios, and ultimately propose a combination of scenarios that effectively synergize flood prevention and removal among districts and counties.
The data source of this dataset is from the calculation results of the model run for the Lake Tai Basin. There is a certain reliability.
Based on the latest subsurface data, study area polder drainage modulus, pumping station drainage capacity data, the model of Taihu Lake basin was optimized and updated, and a series of study area flood control and flood removal schemes were set up. And selected the Taihu Lake Basin 100-year “99 south” type design rainstorm simulation, obtained the cross-regional flood control and flood removal synergistic evaluation dataset, and analyzed the cross-regional urban synergistic flood control and flood removal standards.
From the results of the Taihu Lake basin model rate determination, the simulated water level process at the model stations is relatively close to the measured water level process, and the maximum difference between the simulated maximum water level and the actual value is no more than 0.1m, and the relative errors between the simulated value and the actual value at the stations within the Yangtze River Delta Eco-Green Integration and Development Demonstration Zone are all less than 5%, indicating that the simulation accuracy of the updated model of the Taihu Lake Basin is relatively high.
Two key factors, flood risk and maximum water level in the dike, were screened to reflect the flooding situation and management capacity at the basin and regional levels, and a synergistic evaluation guideline for cross-regional flood prevention and removal standards based on master-slave game was proposed and empirically applied in the demonstration area.
① The results of the multi-stage game show that the upstream and downstream areas are not synergistic drainage capacity is the cause of the overall flood control and flood control risk is higher; expanding their own drainage capacity in reducing their own drainage risk will also increase the adjacent areas of flood control and flood control risk, but also on their own flood control will produce a negative feedback.
② Under the status quo program, i.e., Wujiang adopts a drainage power of 1,728.0 hours m3/s，Downstream drainage power is 1290.6m3/s, the downstream area of the pike is at high risk of flooding and the flood control and removal in the demonstration area is not synergistic.
③ Under the scenario of guaranteeing the drainage safety of each polder, optimize the drainage power of both sides of the game, and finally determine the combination of upstream and downstream synergistic flood control and flood removal capacity as follows: constrain the drainage power of the upstream Wujiang area to 1600m3/sAt the same time, the downstream drainage power of Jiashan-Qingpu was upgraded to 1700m3/sIn order to enable the study area to realize the demonstration area polders inside and outside the river network water level does not exceed the design level, at this time the demonstration area of the flood control and flood removal of the benefits of the integrated optimal flood control and flood control capacity of the most synergistic.
| # | number | name | type |
| 1 | 2021YFC3000100 | Lower Yangtze River Flood Disaster Integration and Control and Emergency De-risking Technology and Equipment | National key R & D plan |
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CSTR:11738.11.NCDC.NHRI.DB6773.2025
10.12072/ncdc.nhri.db6773.2025