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干旱区地理 ›› 2018, Vol. 41 ›› Issue (2): 325-333.

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Palaeoflood sedimentological and hydrological study of the Luzhuang section in the upper reaches of Huaihe River

WANG Zhao-duo1, HUANG Chun-chang1, ZHA Xiao-chun1, PANG Jiang-li1, ZHOU Ya-li1, LI Xiao-gang2   

  1. 1. Department of Geography, Shaanxi Normal University;National Demonstration Center for Experimental Geography Education, Xi'an 710119, Shaanxi, China;
    2. College of Urban, Rural Planning and Architecture, Shangluo Uinversity, Shangluo 726000, Shaanxi, China
  • Received:2017-10-13 Revised:2018-02-15 Online:2018-03-25

Abstract: Precipitation changes in Huaihe River basin have been notable in the history.Because it is located in a transitional climate zone between the north and the south in China and also in a transitional zone in the mid-latitude of the Northern Hemisphere,the heavy rainfall events and floods had frequently occurred which resulted in extremely serious loss of life and property in the region.The palaeoflood research about the Huaihe River Basin is almost blank.It is extremely necessary to consider the flood frequency in a longer time scale In this study,through detailed field investigation,the paleoflood slackwater deposits (SWDs) were identified from Holocene loess-paleosol profiles in the upper reaches of Huaihe River and analyzed at the laboratory.Using methods such as the particle size parameters Q-type clustering,the fractal dimensions and end member analysis,the study on the particle size revealed that the difference between the SWDs and loess-paleosols was obvious which was in accordance with the macro characteristics observed in the field.On top of this analysis,the flood peak stage and peak flow of the palaeoflood were simulated based on the bedrock canyon river channel and the characteristic of the stratigraphic sediments.This hydrologic reconstruction indicated that there were at least six extraordinary flood events with their flood peak stages about 10 meters high above the normal water level in the upper reaches of Huaihe River since the Holocene.The flood peak water levels were 111.28 m (SWD1),110.03 m (SWD2),111.78 m (SWD3),112.03 m (SWD4),113.67 m (SWD5) and 114.36 m (SWD6) respectively and the corresponding peak flows were 9 361.52 m3·s-1 (SWD1),7 062.18 m3·s-1 (SWD2),10 247.65 m3·s-1 (SWD3),10 732.87 m3·s-1 (SWD4),14 326.04 m3·s-1 (SWD5) and 16 040.94 m3·s-1 (SWD6) respectively.The methods and the results presented in this study have important significance for the construction of water conservancy and hydropower project in the upper reaches of Huaihe River.

Key words: upper reaches of Huaihe River, palaeoflood SWD, particle size analysis, holocene, hydrology

CLC Number: 

  • P534.63.2