[1]YANG Yuandong,WANG Yonghong,CAI Silong,et al.Characteristics of Interannual and Intra-annual Variation of Sediment Discharge in the Pearl River Basin over the Past 60 Years[J].Research of Soil and Water Conservation,2021,28(02):155-162.
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Characteristics of Interannual and Intra-annual Variation of Sediment Discharge in the Pearl River Basin over the Past 60 Years
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 02
Page number:
155-162
Column:
Public date:
2021-02-06
- Title:
- Characteristics of Interannual and Intra-annual Variation of Sediment Discharge in the Pearl River Basin over the Past 60 Years
- CLC:
- P336; P333.4
- DOI:
- -
- Abstract:
- In order to understand the impact of human activities on the sediment transport in the Pearl River Delta in recent decades, based on the sediment discharge data of major hydrological stations(Xijiang Gaoyao, Beijiang Shijiao, Dongjiang Boluo)in the downstream of the Pearl River Basin from 1960 to 2017, various methods such as interannual variation coefficient(Sv), the M-K trend analysis, the cumulative anomaly, concentration(period)and sediment discharge contour method were used to provide a reference for the rational use of sediment resources and the comprehensive management of watersheds. The results show that the inter-annual variability of the sediment discharge in the Pearl River Basin was large and the stability of the sediment transport rate was poor from 1960 to 2017; Dongjiang is the tributary with the largest variation in sediment discharge among the three Rivers; in recent decades, the sediment discharges of the Xijiang River and the Dongjiang River have dropped significantly; the declines started around 2001 and 1987, and there was little change in the sediment discharge in Beijiang; the concentration during the year showed that the concentration of sediment discharge in the downstream of the Pearl River Basin during the year was higher in Xijiang than those in Beijiang, and Dongjiang. In recent decades, human activities have played the significant role in the change of sediment discharge in the Pearl River Basin, which is mainly caused by the construction of dams and reservoirs in the basin and the differences in soil and water loss caused by policy and economic develpment.
- References:
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Last Update:
2021-02-10