| 摘要: |
| 河湖水系连通是流域及区域防洪、供水和水生态安全的重要基础。现有的基于水流阻力与图论的水系连通性评价方法并不适用于连通性受闸门工程调度影响较大的平原河网区，为此提出了改进的水系连通性评价方法，不仅考虑河网中不同类型河道的实际输水能力，还考虑了闸门启闭的开启度。以太湖流域平原河网区为例，运用太湖流域水量水质模型中的概化河网绘制河网图，结合模型计算出各河道水位及闸门开启度，构建出加权邻边矩阵，并利用MATLAB编程算出每个节点连通性，进行了平原河网区典型年时河网水系连通性评价。总体评价结论为太湖流域平原区总体水系连通性较高，但各水利分区的连通性有一定差异，其中阳澄淀泖区和太湖区水系连通性较高。评价结论符合太湖流域平原河网区的实际情况，和前期研究方法的结论基本一致。该方法实现了受闸门调度影响较大河网水系的连通性定量化评价，可用于河网水系连通性变化评估、改善水系连通工程设计等领域。 |
| 关键词: 连通性 图论 平原河网区 闸门运行 |
| DOI： |
| 分类号:TV21 |
| 基金项目:水利部公益性行业科研专项经费项目“太湖流域综合调度及河湖有序流动技术研究”（201501015） |
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| Evaluation of river network connectivity in plain area of Taihu basin |
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ZHU Fawen, LU Zhihua, CAI Mei, WANG Yuanyuan
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Water Conservancy Development and Research Center， Taihu Basin Authority， MWR， Shanghai
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| Abstract: |
| The river network connectivity is an important basis for the flood control, water supply and ecological security. An improved evaluation method based on hydraulic resistance and the graph theory is put forward. This method takes into account not only the capacity of different channel types, but also the operation conditions of the sluices including closing and opening conditions, which was never considered in previous methods. The method has been applied to the evaluation of the river network connectivity in the plain area of the Taihu basin, which is a typical complex system of the “nature and artificial”. By using the water quantity and quality model for Taihu basin, the structure sketch map of the river network can be established, the water levels of all the rivers and the opening degree of the sluices in the basin can be calculated, and weighted adjacent edge matrix can be set up finally. Using MATLAB，the connectivity degree of the river network in a typical year (1990) can be estimated relatively quickly. The overall evaluation results show that the overall connectivity degree of the total water system in the plain area of the Taihu basin is high, but there are some differences among each water resources district: the connectivity degree of the Yangchengdianmao and the Taihu district is the maximum. The evaluation result conforms to the actual situation and is consistent with the conclusion of the previous research conclusions. The method realizes the quantitative evaluation of the connectivity in the plain river network area，and can be used for water system connectivity assessment so as to improve the design of the water network system. |
| Key words: river network connectivity graph theory plain river network area opening degree of the sluices |
