| 椒江河口河床宽深比对水沙条件的响应分析 |
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| 引用本文： | 周鸿权,李伯根,顾裕兵,巩明,杨辉.椒江河口河床宽深比对水沙条件的响应分析[J].海洋学研究,2014,32(4):69-75. |
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| 作者姓名： | 周鸿权 李伯根 顾裕兵 巩明 杨辉 |
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| 作者单位： | 1.国家海洋局 第二海洋研究所 工程海洋学重点实验室,浙江 杭州 310012;2.浙江省电力设计院,浙江 杭州 310012 |
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| 基金项目： | 国家海洋局青年基金项目资助，国家海洋局第二海洋研究所基本科研业务费专项项目资助 |
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| 摘 要： | 本文利用多年水文泥沙和水深地形资料,分析了椒江河口河床宽深比长周期变化特征,并尝试探讨了河床宽深比对水沙条件的响应。结果表明,径流和潮动力对河床形态影响程度沿程此消彼长,江口沙上游河段受径流作用较明显,栅浦下游河段受潮动力影响较显著,这应是弯曲和顺直河段河床横断面形态调整差异的影响因素;河床宽深比与径流平均输沙率正相关,径流产沙量减少,河床形态趋向窄深;顺直河段宽深比与平均流量负相关,径流来水减少,河床趋于宽浅;河床宽深比与平均潮差负相关,应是人为作用改变了潮动力对河口河床形态调整的影响。
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| 关 键 词： | 椒江 宽深比 河床形态 长周期调整 统计分析 |
| 收稿时间： | 2014-03-01 |
Response analysis of the riverbed width-depth ratio to hydrographic and sediment condition in Jiaojiang Estuary |
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| ZHOU Hong-quan,LI Bo-gen,GU Yu-bing,GONG Ming,YANG Hui.Response analysis of the riverbed width-depth ratio to hydrographic and sediment condition in Jiaojiang Estuary[J].Journal of Marine Sciences,2014,32(4):69-75. |
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| Authors: | ZHOU Hong-quan LI Bo-gen GU Yu-bing GONG Ming YANG Hui |
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| Institution: | 1. Laboratory of Engineering Oceangraphy, The Second Institute of Oceanography, SOA, Hangzhou 310012, China;2. Zhejiang Electric Power Design Institute, Hangzhou 310012, China |
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| Abstract: | Based on the multi-year hydrographic and bathyorographical data, the long-term variation of the riverbed width-depth ratio of Jiaojiang Estuary was analyzed and the response of the riverbed width-depth ratio to hydrographic and sediment condition was tried to discuss. The results indicate that the influences of runoff and tidal dynamic on the riverbed configuration are always opposite along the river channel, runoff is more significant on bend reach above Jiangkousha, and tide dynamic is the dominant on the straight reach from the lower reach of Zhapu, which may be the influence factor of regulating difference of riverbed transection configuration between the bend reach and straight reach. The correlation between the width-depth ratio and mean suspended sediment discharge is positive, which indicates that the riverbed configuration has tended to be narrow and deep with the decrease of the suspended sediment discharge. The negative correlation between the width-depth ratio and mean water discharge may indicate that the riverbed configuration of straight reach has tended to be wide and shallow with the decrease of the water discharge. Human being may change the effect of the tidal dynamics to the riverbed configuration for decades, which result in the negative correlation between the width-depth ratio and mean tidal range. |
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| Keywords: | Jiaojiang width-depth ratio riverbed configuration long-term adjustment statistical analysis |
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