WANG Chang-yan, ZHAO Jing-bo, YU Yao-chuang. FLOOD SEDIMENT IN VALLEY FLAT AND THE CLIMATIC IMPLICATIONS OF LANZHOU SECTION OF THE YELLOW RIVER[J]. Marine Geology & Quaternary Geology, 2008, 28(4): 125-132. DOI: 10.3724/SP.J.1140.2008.03125
Citation: WANG Chang-yan, ZHAO Jing-bo, YU Yao-chuang. FLOOD SEDIMENT IN VALLEY FLAT AND THE CLIMATIC IMPLICATIONS OF LANZHOU SECTION OF THE YELLOW RIVER[J]. Marine Geology & Quaternary Geology, 2008, 28(4): 125-132. DOI: 10.3724/SP.J.1140.2008.03125

FLOOD SEDIMENT IN VALLEY FLAT AND THE CLIMATIC IMPLICATIONS OF LANZHOU SECTION OF THE YELLOW RIVER

More Information
  • Received Date: February 25, 2008
  • Revised Date: June 05, 2008
  • According to grain size analyses of 60 samples, we studied flood variations indicated by deposits in valley flat of the Yellow River in Lanzhou section over recent 150 years. Results indicated that the profile section was obviously stratified in Lanzhou area during these years, which can clearly reflect the variations of flood and short-term precipitation with high resolution, and is a good index indicating the variations of flood and precipitation. The grain composition reflected changes in the strength of flood conveying power during sedimentation, thick grains showing stronger conveying power and thin grains suggesting weaker conveying power. The section was divided into 10 sediment stages,indicating 10 floods of different scales and 10 years with much precipitation. The stages between 10 flood stages show no flood occurrence or that the floods' scales were very small, indicating normal or less precipitation in this river basin. The forth layer formed in 1904, and the biggest runoff was 8 500 m3/s. Flood scales of the fifth, sixth, seventh, eighth, ninth and tenth stages were all smaller than that in 1946, and their biggest runoffs were all smaller than 5 900 m3/s, that is to say, the biggest runoff was smaller than 5 900 m3/s for recent 100-150 years. The grain composition varied obviously from up to bottom. According to the grain composition characteristics of each layer and the criterions determining the flood depth in the valley flat, we come to the conclusion that the order of depth and scale of floods of the section from big to small is 4th, 1st, 2nd, 8th, 3rd, 9th, 7th, 5th, 6th and 10th. According to characteristics of precipitation in Lanzhou City, the causes of floods and comparatively big sediment depth of all layers in the section, it was concluded that 10 flood stages were all caused by obvious increase of precipitation in Lanzhou section of the Yellow River or such branches as Taohe, Datong and Daxia Rivers of that year.
  • Related Articles

    [1]LIN Xinru, XIAO Guoqiao, YANG Jilong, PAN Qing, ZHAO Qingyu, LIANG Meiyan. The Yellow River never flows into the sea through the Yongding River[J]. Marine Geology & Quaternary Geology, 2024, 44(2): 46-54. DOI: 10.16562/j.cnki.0256-1492.2024013103
    [2]XING Lvyang, LI Guangxue, LIU Siyu, LI Haonan, PAN Yufeng. Formation of the Diaokou Lobe in Yellow River Delta[J]. Marine Geology & Quaternary Geology, 2023, 43(4): 97-104. DOI: 10.16562/j.cnki.0256-1492.2023040901
    [3]ZHANG Peng, YANG Jinsong, ZHAO Hua, LIU Zhe, SONG Lei, ZHANG Run, CAO Wengeng. Research progress of the Holocene paleoflood in the Yellow River basin and a future prospect[J]. Marine Geology & Quaternary Geology, 2020, 40(6): 178-188. DOI: 10.16562/j.cnki.0256-1492.2020042601
    [4]AI Lina, HAN Zongzhu, WU Xiao, BI Naishuang, WANG Houjie. Geochemical characteristics of clay-sized sediments of the Yangtze and Yellow Rivers and their implications for provenance[J]. Marine Geology & Quaternary Geology, 2020, 40(3): 109-118. DOI: 10.16562/j.cnki.0256-1492.2019050603
    [5]YU Hao, PENG Tingjiang, LI Meng, YU Fengxia, YE Xiyan, GUO Benhong, ZHANG Jun, LI Jijun. Magnetic susceptibility enhancement model and its driving mechanism of Lanzhou loess on the Western Loess Plateau[J]. Marine Geology & Quaternary Geology, 2018, 38(2): 165-174. DOI: 10.16562/j.cnki.0256-1492.2018.02.017
    [6]LIU Shasha, WANG Houjie, ZHANG Yong, BI Naishuang. IMPACTS OF CLIMATE CHANGE AND HUMAN ACTIVITY ON SEDIMENT DISCHARGE IN THE MIDDLE REACH OF THE YELLOW RIVER[J]. Marine Geology & Quaternary Geology, 2014, 34(4): 41-50. DOI: 10.3724/SP.J.1140.2014.04041
    [7]XUE Chunting, LIU Jian, KONG Xianghuai. CHANNEL SHIFTING OF LOWER YELLOW RIVER IN 1128-1855AD AND ITS INFLUENCE TO THE SEDIMENTATION IN BOHAI, YELLOW AND EAST CHINA SEAS[J]. Marine Geology & Quaternary Geology, 2011, 31(5): 25-36. DOI: 10.3724/SP.J.1140.2011.05025
    [8]CHANG Fangqiang, JIA Yonggang. DISASTERS CAUSED BY WAVE-INDUCED SEDIMENT LIQUEFACTION AT THE YELLOW RIVER DELTA,CHINA[J]. Marine Geology & Quaternary Geology, 2011, 31(2): 43-48. DOI: 10.3724/SP.J.1140.2011.02043
    [9]YANG Xiujuan, JIA Yonggang, LIU Hongjun, SHAN Hongxian. RESEARCH ON CONSOLIDATION CHARACTERISTICS AND ORIGIN OF THE YELLOW RIVER ESTUARY SEDIMENTS[J]. Marine Geology & Quaternary Geology, 2009, 29(5): 29-34. DOI: 10.3724/SP.J.1140.2009.05029
    [10]ZHOU Liang-yong, LI Guang-xue, LIU Jian, LI An-long, DENG Sheng-gui, WEN Guo-yi, ZHAO Dong-bo. CHARACTERISTICS OF TIDAL FLAT PROFILES IN THE YELLOW RIVER DELTA[J]. Marine Geology & Quaternary Geology, 2006, 26(2): 1-8.

Catalog

    Article views (1312) PDF downloads (14) Cited by()

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return