[1]CHEN Yan,WANG Yanhua,YE Bin,et al.Characteristics of Distribution of Sediment Particle Size and Its Environmental Records in Baoxianghe Reservoir of the Dianchi Basin[J].Research of Soil and Water Conservation,2021,28(03):7-12.
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Characteristics of Distribution of Sediment Particle Size and Its Environmental Records in Baoxianghe Reservoir of the Dianchi Basin
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 03
Page number:
7-12
Column:
Public date:
2021-04-20
- Title:
- Characteristics of Distribution of Sediment Particle Size and Its Environmental Records in Baoxianghe Reservoir of the Dianchi Basin
- Keywords:
- sediment; particle size; Sahu discriminant; grade-standard deviation method; Baoxianghe Reservoir
- CLC:
- P512.2
- DOI:
- -
- Abstract:
- The particle size characteristics of sediments can not only indicate the source and migration pattern of sediments, but also reveal the regional warm and humid changes in different historical periods. In this study, the sediments from Baoxianghe Reservoir of the Dianchi Basin were taken as the research object in order to study the vertical variation characteristics of sediment particle size and the recorded environmental change information. The Sahu discriminant method was used to identify the sedimentary environment. The environmental sensitive components in the sediments were analyzed by the grade-standard deviation method. The results show that:(1)the content of coarse silt(16～64 μm)in the sediments was the highest(39.6%); the contents of clay(<4 μm)and fine silty(4～16 μm)were the same, with a total of 50.3%. The content of sandy(>64 μm)was the lowest(10.1%); the contents of clay and fine silty increased with the burial depth, and the coarse particles with particle size of 16 μm or more decreased with the burial depth;(2)the characteristics of the basic parameters of sediment particle size indicated that the sediment had poor sorting, the skewness was extremely negative or negative, the kurtosis was medium or wide and flat, and the average particle size was between 5.56～6.94 μm;(3)we deduced from the results of Sahu discriminant that the inflow stream of the Baoxianghe Reservoir might be discontinuous; the sensitive components by the grade-standard deviation method revealed that the hydrodynamic conditions of the sedimentary environment in the study area tended to be higher; component B was sensitive to the change of sedimentary environment; the precipitation had the significant effect on the particle size of sediments in this study area.
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Last Update:
2021-04-20