【摘要】 基于MIKE11建立了苏北灌溉总渠一维河道水流模型，采用2015年、2021年实测地形及洪水资料对模型进行了率定和验证，且计算值与实测值均吻合较好，所建模型能较好模拟河道洪水演进过程。采用该模型对2021年地形条件下河道现状行洪能力进行了计算，结果表明：苏北灌溉总渠现状行洪能力局部河段不满足800 m~3/s的设计标准，总渠地涵至入海口段仅为设计行洪能力的50%。入海口处六垛南闸下港道淤积是河道行洪能力不足的主要影响因素，造成上游河道主要控制节点水位最大壅高0.78 m；采用闸下港道清淤等工程措施后，可有效恢复河道行洪能力。更多还原

【Abstract】 The one-dimensional river flow model of the irrigation canal in North Jiangsu was established based on MIKE11. The measured topography and flood data in 2015 and 2021 were used to calibrate and verify the model. The calculated values were in good agreement with the measured values, and the established model could better simulate the river flood evolution process. The model is used to calculate and analyze the current flood discharge capacity of the river under terrain conditions in 2021. The results show that the current flood discharge capacity of the irrigation canal in North Jiangsu as a whole does not meet the design standard of 800 m~3/s,and the section from the ground culvert of the main canal to the sea entrance is only 50% of the designed flood discharge capacity..Estuarine siltation of the lower channel of Liuduo south gate at the sea entrance was the main factor affecting flood discharge capacity of the river, and the maximum flood height of the main control nodes in the upstream river was 0.78 m. The flood discharge capacity of the river can be effectively restored by using engineering measures such as silt removal.更多还原