We have done the reanalysis on the data of flood hazards in the mid-reaches of Jinghe River from 1646 to 1949,using the historical document.As a result,it is found that the flood hazards in this area are mostly local ones in a small scale.It is worth to point out that the flood hazards in the study area happened more frequently in the middle of the 20th.Spectral analysis on the flood sequence indicates that there exist periodicities of 101 years,11 years and 3.4-2.2 years in the mid-reaches of the Jinghe Rive.The centennial and quasi-decennial periodicities can be well correlated respectively to those of solar activity;the periodicity of 3.4-2.2 years is probably associated with the activity of tropical air mass,which indicates that both the solar activity and the atmospheric activity in the area of low latitude ocean can influence the frequency of flood hazards in the study region.
LIU Xiao-Qing, ZHAO Jing-Bo, YU Xue-Feng
. Flood Hazards in the Mid-reaches of Jinghe River during Qing Dynasty[J]. SCIENTIA GEOGRAPHICA SINICA, 2007
, 27(3)
: 445
-448
.
DOI: 10.13249/j.cnki.sgs.2007.03.445
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