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对无锡市中心城区运东大包围河网15条骨干河道进行概化,建立了无锡市中心城区河网区一维水动力数学模型,并采用实测水位资料对模型参数进行了率定和验证。根据20年一遇典型降雨条件计算产汇流过程,采用所建立的数学模型,在枢纽泵站抽水、管网自排区、圩区和排水片同时启用时对大包围调度方案进行了研究。河网水位过程计算结果表明,大包围内河道水位西低东高,水面比降较大;中心城区河网中心区水位较高,各泵站前水位较低,部分河道断面过流能力不足;最高水位出现时间一般处于最大降雨量时段的最后10min内;中心城区一维河网模型可以为防汛指挥部门提高中心城区大包围控制工程的运行效率以及防洪排涝联合调度方案优化提供建议和技术支持。
This paper makes a generalization of 15 key rivers in Yun’dong city centering around Wuxi City, and establishes a one-dimensional hydrodynamic model for river network in central urban area of Wuxi City. The model parameters are calibrated and validated by the measured water level data. Based on the typical rainfall conditions in 20 years, the process of confluence and runoff was calculated, and the mathematical model was established to study the large bounded scheduling scheme when pumping at the pumping station, self-draining pipe network, polder area and drainage board were enabled simultaneously. The results of river level water level calculation show that the water level of the inner river surrounded by the west is low and the east is high, and the water surface ratio drop is relatively large. The water level in the center of the central urban river network is relatively high, the water level in front of each pumping station is low, The maximum water level emerges generally within the last 10 minutes of the maximum rainfall period. One-dimensional river network model in the downtown area can provide suggestions and technical support for the flood control headquarters to improve the operation efficiency of the large encirclement control project in the downtown area and the optimization of the flood control and drainage scheduling plan.