杨帆,周钰林,范子武,等. 苏南运河沿线精细化水文-水动力模型构建及验证[J]. 水利水运工程学报,2020(1):16-24. doi: 10.12170/20190501001
引用本文: 杨帆,周钰林,范子武,等. 苏南运河沿线精细化水文-水动力模型构建及验证[J]. 水利水运工程学报,2020(1):16-24. doi: 10.12170/20190501001
(YANG Fan, ZHOU Yulin, FAN Ziwu, et al. Building and verification of refined hydrology-hydrodynamic model for South Jiangsu Canal and its river networks[J]. Hydro-Science and Engineering, 2020(1): 16-24. (in Chinese)). doi: 10.12170/20190501001
Citation: (YANG Fan, ZHOU Yulin, FAN Ziwu, et al. Building and verification of refined hydrology-hydrodynamic model for South Jiangsu Canal and its river networks[J]. Hydro-Science and Engineering, 2020(1): 16-24. (in Chinese)). doi: 10.12170/20190501001

苏南运河沿线精细化水文-水动力模型构建及验证

Building and verification of refined hydrology-hydrodynamic model for South Jiangsu Canal and its river networks

  • 摘要: 苏南运河自北向南穿过太湖流域腹部,具有航运、防洪排涝、灌溉和景观功能。近些年,运河汛期水位连年超历史,造成运河沿线及周边受灾严重。精细化水文-水动力模型可为运河高水位成因分析、防汛排涝调度决策、新老工程效益评估提供技术手段。基于Infoworks ICM软件,充分考虑苏南运河沿线平原河网地区圩区、城区管网以及复杂下垫面,构建了苏南运河沿线平原河网水文水动力模型。鉴于苏南运河沿线水系边界难以确定,将模型构建范围扩大至2.16万km2。采用2015年和2016年的汛期实况降雨、水位和调度数据对模型进行率定和验证。绝大多数水文站点水位模拟纳什系数接近于1,模型可信度高;可决系数显示相关性中等偏上,模型总体结果可信。同时相比其他片区,湖西区精度更高,主要原因是相比其他片区,湖西区受人为调度干预较少。

     

    Abstract: Passing through the abdomen of the Taihu Lake basin from north to south, the South Jiangsu (Sunan) Canal has the functions of navigation, flood control and drainage, irrigation and landscape. In recent years, the water level of the canal has exceeded the historical high level, causing serious disasters along the canal and its surrounding areas. The refined hydrology-hydrodynamic model developed by us can provide technical means and scientific basis for the cause analysis of the high water level of the canal, the decision-making of flood control and drainage, and the benefit evaluation of new and old works. Based on the Infoworks ICM software, the hydrology-hydrodynamic model of the plain river network along the South Jiangsu Canal is built, taking into account the polder area, urban pipeline network and complex underlying surface of the plain river network along the South Jiangsu Canal. In view of the difficulty in determining the boundary of the river system along the South Jiangsu Canal, the study area of the model has been extended to 21,600 km2. The model is validated and calibrated using the actual rainfall, water level and water conservancy work operation data in the flood seasons of 2015 and 2016. The verification results show that the refined hydrology-hydrodynamic model for the Sunan Canal has high credibility and can provide a technical support for academic research and engineering application. The Nash coefficients of most hydrological stations are close to 1, and the reliability of the model is high. The determination coefficient results show that the correlation is moderate, and the overall results of the model are credible. At the same time, compared with other areas of the Taihu Lake, the simulation accuracy of the western area of the Taihu Lake is higher. The main reason is that the western area of the Taihu Lake is less intervened by man-made dispatching.

     

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