太湖流域平原河网区水系连通性评价

发布时间：2018-03-06 13:03

本文选题：连通性　切入点：图论　出处：《水利水运工程学报》2017年04期 　论文类型：期刊论文

【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。
[Abstract]:The connectivity of rivers and lakes is an important basis for flood control, water supply and ecological safety of river basins and regions. The existing methods based on water flow resistance and graph theory are not suitable for evaluating the connectivity of river systems in plain river networks where connectivity is greatly affected by gate engineering regulation. In this paper, an improved method for evaluating the connectivity of river system is proposed, which not only takes into account the actual water conveyance capacity of different types of river channels in the river network, but also considers the opening degree of the gate opening and closing. Taking the plain river network area of the Taihu River Basin as an example, Using the generalized river network in the water quality model of Taihu Lake Basin to draw the river network map, combining with the model to calculate the water level of each channel and the opening degree of the gate, to construct the weighted adjacent edge matrix, and to calculate the connectivity of each node by using MATLAB programming. The connectivity evaluation of river network in typical years in plain river network area is carried out. The overall evaluation conclusion is that the total water system connectivity in plain area of Taihu Lake basin is relatively high, but the connectivity of each water conservancy zoning is different to a certain extent. The water system connectivity between Yangcheng and Taihu areas is relatively high. The evaluation results accord with the actual situation of plain river network in Taihu Lake basin. This method can be used to evaluate the connectivity of river network which is affected by gate dispatching. It can be used to evaluate the connectivity of river network and improve the design of river system connectivity.
【作者单位】：太湖流域管理局水利发展研究中心;
【基金】：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)
【分类号】：TV213.4

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