剧烈变化的径流对九龙江河口流动特性的影响

发布时间：2019-04-19 00:36

【摘要】：为了认识不同径流与潮流博弈引发的河口流动特性的变化规律,采用数学模型和大型河口物理模型耦合的方法,系统研究了九龙江下游北溪浦南水文站、西溪郑店水文站以下广大河口区域的流场及水位场的变化。结果表明,天然状态下,当九龙江径流为15 540、2 896、374m3/s且河口恰遇典型日天文大潮时,潮流界分别位于甘文尾后的红树林海洋自然保护区、南北中港以及西溪河道的渡头村和北溪河道的科坑村,径流变化可使潮流界上溯约35km;不同径流条件下河口三角洲的南港、中港、北港行洪和纳潮的分流比及流动特性发生显著变化;九龙江葫芦状河口及厦门岛周边存在径流对潮位影响的分界区,厦门岛北支口门区域受九龙江北溪和西溪径流影响很小。
[Abstract]:In order to understand the variation law of estuarine flow characteristics caused by different games of runoff and tidal current, a systematic study of Beixi Punan hydrologic station in the lower reaches of Jiulong River was carried out by means of coupling mathematical model with large estuary physical model. The variation of flow field and water level field in the estuarine area below Xixi Zhengdian hydrologic station. The results show that under the natural condition, when the runoff of Jiulong River is 15540, 2 896374m3/s, and the estuary meets typical daily astronomical tide, the tidal current boundary is located in the mangrove marine nature reserve behind Ganwenwei, respectively. In the north-south Zhonggang and the Dutou village of the Xixi River and the Kekeng village of the Beixi River, the runoff changes can make the tidal flow boundary traceable to about 35 km; Under different runoff conditions, the distributary ratio and flow characteristics of flood and tidal transport in Nangang, Zhonggang and Beigang of estuary delta changed significantly. There is a boundary area in which runoff affects tidal level in the Hulu estuary of the Jiulong River and around Xiamen Island. The north branch gate area of Xiamen Island is little affected by the north and west streams of the Jiulong River.
【作者单位】：福建省水利水电勘测设计研究院;
【基金】：水利部公益性行业科研专项(201301087)
【分类号】：P333;TV14

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