| 渭河下游平滩流量影响因子相关分析 |
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| 引用本文： | 李文文,吴保生.渭河下游平滩流量影响因子相关分析[J].应用基础与工程科学学报,2011(Z1):28-36. |
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| 作者姓名： | 李文文 吴保生 |
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| 作者单位： | 清华大学水沙科学与水利水电工程国家重点实验室; |
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| 基金项目： | 科技部“973”项目(2011CB409901); 中荷战略科学联盟计划项目(2008DFB90240) |
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| 摘 要： | 渭河是黄河最大的支流,渭河下游河道主槽的严重萎缩和平滩流量的大幅度减小,严重威胁下游的防洪排涝.由于渭河下游非汛期来水来沙较少,因而对于平滩流量的计算,人们都忽略了非汛期水沙条件变化、潼关高程对汛后平滩流量的影响.近年来,随着汛期来水来沙量的减少,非汛期来水来沙条件对平滩流量的影响逐渐增大.本文运用人工神经网络方法,分别建立渭河下游华县站汛期和非汛期来水来沙条件等影响因子与平滩流量的人工神经网络模型,结果显示:当平滩流量计算中加入非汛期来水来沙、潼关高程等影响因子后,计算精度有大幅提高,且平均相对误差有所减小,平滩流量的计算更加准确.
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| 关 键 词： | 渭河下游 平滩流量 非汛期 潼关高程 BP神经网络 |
Analysis of Influential Factors of Bankfull Discharge in the Lower Wei River |
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| LI Wenwen,WU Baosheng.Analysis of Influential Factors of Bankfull Discharge in the Lower Wei River[J].Journal of Basic Science and Engineering,2011(Z1):28-36. |
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| Authors: | LI Wenwen WU Baosheng |
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| Institution: | LI Wenwen,WU Baosheng (State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China) |
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| Abstract: | The main channel of the Lower Wei River,the largest tributary of the Yellow River,was deposited and shrinked seriously in recent years.It lead that the bankfull discharge was decreased significantly,therefore flood flows usually overflow the floodplains whether high or low flood flows.The flow and sediment load was very small in the nonflood season,so the effect of flow and sediment load in the nonflood season was ignored.This paper presents a study on the effects of flow and sediment load in the nonflood s... |
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| Keywords: | lower Wei River bankfull discharge nonflood season Tongguan elevation BP Neural Network |
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