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中南大学学报(自然科学版)

Journal of Central South University

第51卷    第9期    总第313期    2020年9月

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文章编号:1672-7207(2020)09-2396-09
基于滑动分析法的黄河下游造床流量变化研究
来志强1, 2,赵连军1,江恩慧1,吴国英1,张向1,程家林3

(1. 黄河水利委员会黄河水利科学研究院 水利部黄河泥沙重点实验室,河南 郑州,450003;
2. 中国科学院 地理科学与资源研究所,北京,100101;
3. 武汉大学 水资源与水电工程科学国家重点实验室,湖北 武汉,430072
)

摘 要: 采用滑动分析法修正经典马卡维也夫法造床能力表达式,避免在分析流量频率时人为划分流量级带来的误差,基于黄河下游花园口水文站1950—2015年实测资料,分析黄河下游造床流量变化规律及新水沙关系。研究结果表明:改进后的造床流量计算方法中流量级长度参数在200~600 m3·s-1范围内、流量级滑动距离参数在1~600 m3·s-1范围内选取,均可准确计算出花园口第一和第二造床流量;1986—1999年,黄河下游第一和第二造床流量显著减少,洪水频次、洪峰流量和多年平均流量明显下降,下游河道淤积萎缩严重;1999年自小浪底水库运用及调水调沙以来,第二造床流量增加,下游河道主槽过流输沙能力提高。目前黄河下游造床能力已由第一造床流量主导转变为第二造床流量主控。

 

关键字: 黄河下游;造床流量;滑动分析方法;水沙关系;马卡维也夫方法

Study on dominant discharge change in the lower Yellow River based on moving analysis method
LAI Zhiqiang1, 2, ZHAO Lianjun1, JIANG Enhui1, WU Guoying1, ZHANG Xiang1, CHENG Jialin3

1. Key Laboratory of Yellow River Sediment Research, Yellow River Institute of Hydraulic Research, Zhengzhou 450003, China;
2. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 10010, China;
3. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China

Abstract:The moving analysis method was employed to revise the bed-forming capacity equation based on the typical Makayev method. The inaccuracy from the man-made discharge stages can be avoided while analyzing the discharge appearance frequency. According to the observed data from the Huayuankou hydrological station from 1950 to 2015, the dominant discharge evolution in the lower Yellow River was analyzed. The new water and sediment relationship was explored. The results show that when the length of the discharge stage is chosen between 200 and 600 m3·s-1 and the moving distance of the discharge stage is chosen between 1 and 600 m3·s-1, the first and second dominant discharge of the observed data from the Huayuankou hydrological station can be obtained accurately. The first and second dominant discharge, flood-peak frequency, flood-peak discharge and average annual discharge in the lower Yellow River from 1986 to 1999 decrease significantly. The lower Yellow River channels also shrunken notably due to the sediment deposition. Since the operation of Xiaolangdi reservoir and water and sediment regulation in 1999, the second dominant discharge increases, and the discharge and sediment transport capability of the main channel in the lower Yellow River improves. The current dominant bed-forming capacity in the lower Yellow River changes from the first dominant discharge to the second one.

 

Key words: the lower Yellow River; dominant discharge; moving analysis method; water and sediment relationship; Makayev method

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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