洞庭湖入江水道断面调整模式研究

发布时间：2018-05-21 14:12

本文选题：河床演变 + 小波分析　；参考：《长江科学院院报》2016年12期

【摘要】：为研究洞庭湖入江水道断面的调整规律,选择城陵矶(七里山)水文断面,根据1962—2010年的实测水沙数据,运用小波分析方法对流量、含沙量序列进行多时间尺度分析,探明了洞庭湖入江水道水沙条件的周期变化规律;并选取城陵矶(七里山)枯水河槽断面面积为特征变量,结合流量小波系数对水沙条件序列进行时段划分;基于滞后响应原理,建立了适用于城陵矶河段断面面积对水沙条件的分时段变化调整模型。结果表明,建立的模型可以较好地模拟洞庭湖入江水道断面的调整规律,计算值与实测值拟合系数R~2为0.77。
[Abstract]:In order to study the regulation law of the section of Dongting Lake, the hydrological section of Chenglingji (Qili Mountain) was selected. According to the measured data of water and sediment from 1962 to 2010, the series of discharge and sediment content were analyzed with wavelet analysis method. The periodic variation law of water and sediment conditions in Dongting Lake channel is proved, and the section area of low water channel in Chenglingji (Qili Mountain) is selected as the characteristic variable, and the sequence of water and sediment conditions is divided according to the wavelet coefficient of discharge. Based on the principle of lag response, a model for adjusting cross-section area to water and sediment conditions in Chenglingji reach is established. The results show that the model can well simulate the regulation of the section of Dongting Lake and the coefficient of fitting between the calculated value and the measured value is 0.77.
【作者单位】：长江科学院水利部江湖治理与防洪重点实验室;河海大学水文水资源学院;武汉大学水资源与水电工程科学国家重点实验室;
【基金】：国家自然科学基金项目(51339001,51209015) 湖北省自然科学基金项目(2014CFB329)
【分类号】：TV147

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