1.梧州水文中心,广西 梧州 543002
2.梧州学院,广西 梧州 543002
朱颖洁(1984-),女,硕士,工程师,主要从事水文与水资源工作。E-mail:351703292@qq.com
收稿:2025-08-13,
修回:2025-10-14,
录用:2025-10-20,
网络出版:2026-01-06,
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朱颖洁,张立杰.西江中游干支流枯季径流量时空演变规律及归因[J].人民珠江,DOI:10.3969/j.issn.1001-9235.XXXX.XX.001.
ZHU Yingjie,ZHANG Lijie.Spatiotemporal Evolution Law and Attribution of Dry Season Runoff in the Middle Reaches of Xijiang River[J].PEARL RIVER,
朱颖洁,张立杰.西江中游干支流枯季径流量时空演变规律及归因[J].人民珠江,DOI:10.3969/j.issn.1001-9235.XXXX.XX.001. DOI:
ZHU Yingjie,ZHANG Lijie.Spatiotemporal Evolution Law and Attribution of Dry Season Runoff in the Middle Reaches of Xijiang River[J].PEARL RIVER, DOI:10.3969/j.issn.1001-9235...001.
枯季是西江流域的关键水资源调节期,开展西江中游干支流枯季径流量规律研究,可为流域各级党委政府和相关部门决策提供参考。运用Mann-Kendall秩次相关检验、有序聚类分析法、Morlet小波分析法等分析枯季径流量的趋势、突变和周期成分;利用Kriging插值法分析其空间分布特征;利用累积量斜率变化率法分析降雨量和人类活动对其影响。结果表明:西江中游干支流枯季径流量呈不显著的上升趋势,没有发生显著突变;支流桂江和蒙江的枯季径流量事件容易发生异常现象;降水的变化并不是引起西江支流蒙江、桂江和西江干流枯季径流量变化的主要原因。
The dry season is a critical period for water resource regulation in the Xijiang River Basin. Therefore
research on the runoff patterns of the main and tributary rivers in the middle reaches of the Xijiang River during the dry season can provide reference for decision-making by party committees
governments
and relevant departments at all levels in the basin. In this study
the trends
mutations
and periodic components of dry season runoff are explored using the Mann Kendall rank correlation test
ordered clustering analysis
Morlet wavelet analysis
and other methods. The spatial distribution characteristics are analyzed by the Kriging interpolation method. The effects of precipitation and human activities on the runoff are studied with the cumulative slope change rate method. The results showed that the dry season runoff of the main and tributary streams in the middle reaches of the Xijiang River shows an insignificant upward trend. There is no significant mutation in the dry season runoff series at Taiping Station
Jinji Station
Pingle Station
and Wuzhou Station. The dry season runoff series mainly exhibits cycles of about 3 years
6–7 years
15–19 years
and 32–36 years. The dry season runoff variation of main and tributary streams is uneven and asynchronous. The dry season runoff in the Xijiang River basin increased from the 1960s to the 1980s
decreased in the 1990s
and continued to decrease in the 2000s for tributary streams while starting to increase for the main stream
but saw a significant increase again in the 2010s. During the same period
the dry season runoff of different rivers also varied
with the main stream of the Xijiang River having the highest dry season runoff
the tributary Guijiang River having the highest dry season runoff
and the Mengjiang River having the lowest. The dry season runoff events of the tributary Guijiang and Mengjiang Rivers are prone to anomalies
while the dispersion coefficient of dry season runoff at the Wuzhou station on the main stream is in the low value range. The dry season runoff in the middle reaches of the Xijiang River shows an insignificant decreasing trend
with the decreasing trend gradually diminishing from the main stream to the tributary Beiliu River. The increased regulation of water conservancy projects and the implementation of soil and water conservation measures since the 21st century are the main reasons for the changes in dry season runoff in the tributaries of the Xijiang River
including the Mengjiang River and the Guijiang River
as well as the main stream of the Xijiang River. However
precipitation is an important factor contributing to the changes in dry season runoff in the Beiliu River. The analysis results can provide scientific and reliable technological support for the scientific management
development
protection
and administration of the Xijiang River basin
and offer references for decision-making by party committees
governments
and relevant departments at all levels in the basin.
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