陈吟,屈丽琴,王延贵,沈健

• 1:中国水利水电科学研究院
• 2:国际泥沙研究培训中心
• 3:长江水利委员会水文局荆江水文水资源勘测局

摘要(Abstract)：

近年来长江荆江河段冲刷下切严重，导致荆江三口分流入洞庭湖的水量急剧减少，使得长江与洞庭湖的江湖关系发生了变化。为了分析荆江水系连通性变化过程，首先根据研究区域的水系结构形态建立河网图模型；然后将河道(湖库)连通性综合评价函数值作为河网图模型中连通通道边的权重，构建加权邻接矩阵和畅通度矩阵；最后利用Matlab等工具计算整个水系的连通度。研究结果表明，1955—2015年荆江水系连通性整体上有增加的趋势；荆江干流河道的连通性函数值在1972年前变化不大，1972年后呈增加的趋势；而三口通道和洞庭湖的连通性函数值在2003年前逐渐减小，2003年后呈增加趋势。另外，从河道冲刷、分流分沙、湖泊萎缩等角度分析了连通性变化的主要原因，并从加强水库群优化调度、开展河道整治、实施湖泊治理等角度给出了荆江水系连通性的治理建议。

关键词(KeyWords)： 荆江水系;图论;连通性;荆江三口;河道治理

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51679259)

作者(Author): 陈吟,屈丽琴,王延贵,沈健

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