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平陆运河建设前极端降水对广西北部湾钦江输沙量影响

Tong Kai Zhao Yinjun Hu Baoqing Huang Xiakun Deng Jianming Pan Jiajia Liu Huiwen Xiao Dayuan

水土保持研究2026，Vol.33Issue(1)：39-45,7.
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水土保持研究2026，Vol.33Issue(1)：39-45,7.DOI:10.13869/j.cnki.rswc.2026.01.025

平陆运河建设前极端降水对广西北部湾钦江输沙量影响

Impact of extreme precipitation on sediment discharge in Qinjiang River of Beibu Gulf in Guangxi before construction of Pinglu Canal

Tong Kai 1Zhao Yinjun 2Hu Baoqing 2Huang Xiakun 3Deng Jianming 3Pan Jiajia 4Liu Huiwen 4Xiao Dayuan4

作者信息

  • 1. Key Laboratory of Environment Change and Resources Use in Beibu Gulf,Ministry of Education,Nanning Normal University,Nanning 530001,China||Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation,Nanning Normal University,Nanning 530001,China||State Key Laboratory of Water Disaster Prevention,Hohai University,Nanjing 210098,China
  • 2. Key Laboratory of Environment Change and Resources Use in Beibu Gulf,Ministry of Education,Nanning Normal University,Nanning 530001,China||Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation,Nanning Normal University,Nanning 530001,China
  • 3. Hydrology Center of Guangxi Zhuang Autonomous Region,Nanning 530023,China
  • 4. Guangxi Coastal Hydrology Centre,Qinzhou,Guangxi 535000,China
  • 折叠

摘要

Abstract

[Objective]This study aims to investigate the impact of extreme precipitation on sediment discharge in the Qinjiang River of the Beibu Gulf in Guangxi,thereby providing important scientific support for the construction of the Pinglu Canal project and river management in this region.[Methods]The RClimDex model,Pettitt test,and double mass curve method were used to analyze the variation characteristics of extreme precipitation and sediment discharge in the Qinjiang River Basin before the project construction during 1961-2021,and to quantify the impact of extreme precipitation on sediment discharge.[Results](1)The extreme precipitation indices R1day,R5day,R99p,and PRCPTOT in the Qinjiang River Basin showed decreasing trends,while other indices(R10 mm,R25 mm,R95p,CWD,and SDII)showed increasing trends.All these trends were statistically insignificant.(2)The sediment discharge exhibited a significant decreasing trend(4.45×103 t/a)from 1961 to 2021,with an abrupt change occurring in 1998.[Conclusion]The extreme precipitation indices are significantly correlated with sediment discharge,with the strongest correlation observed between R95p and sediment discharge.The contribution of R95p to the reduction in sediment discharge is calculated to be-25.7%using the double mass curve.

关键词

输沙量/极端降水/钦江/平陆运河

Key words

sediment discharge/extreme precipitation/Qinjiang River/Pinglu Canal

分类

天文与地球科学

引用本文复制引用

Tong Kai,Zhao Yinjun,Hu Baoqing,Huang Xiakun,Deng Jianming,Pan Jiajia,Liu Huiwen,Xiao Dayuan..平陆运河建设前极端降水对广西北部湾钦江输沙量影响[J].水土保持研究,2026,33(1):39-45,7.

基金项目

广西自然科学基金(2025GXNSFAA069302) （2025GXNSFAA069302）

国家自然科学基金项目(42161005,52469003)资助 （42161005,52469003）

河海大学水灾害防御全国重点实验室"一带一路"水与可持续发展科技基金资助项目(2023491511) （2023491511）

水土保持研究

1005-3409

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