摘要
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。
A one-dimensional hydrodynamic model is established to simulate 15 major river channels at the center of Wuxi city. Model parameters are calibrated and validated using surveyed water level data. Rainfall-runoff process is computed according to the typical 20-year period rainfall using a mathematical model; the scheduling scheme is estimated when the pump station, network auto drainage areas, dike areas and drainage areas are used. The simulation results show that the river water lever at the east is higher than the west; water surface is wider, and the water level is higher at the center of network and lower before the pump station. The capacity of conveyance is lower in part of the river section, and the highest water level occurs in the last 10 minutes of maximum rainfall period. The mathematical model might help to improve operation efficiency and provide advice and technical support on optimal scheduling of flood control and drainage scheme for the flood control personnel.
出处
《中国防汛抗旱》
2013年第3期56-59,共4页
China Flood & Drought Management
关键词
运东大包围
水位
河网数学模型
无锡市
Wuxi
the center of Wuxi city
water level
mathematical model
