
1.珠江水文水资源勘测中心,广东 广州 510610
2.华南师范大学,广东 广州 510631
3.水利部珠江水利委员会水文局,广东 广州 510610
4.东江流域水资源与生态环境野外科学观测研究站,广东 惠州 516100
Revised:2026-07-17,
Accepted:21 July 2026,
Online First:05 August 2026,
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胡彩霞,董璇,翁士创等.东江流域径流情势演变及其归因分析[J].人民珠江,DOI:10.3969/j.issn.1001-9235.XXXX.XX.001.
HU Caixia,DONG Xuan,WENG Shichuang,et al.Evolution of runoff regime in the Dongjiang River Basin and its attribution analysis[J].PEARL RIVER,
胡彩霞,董璇,翁士创等.东江流域径流情势演变及其归因分析[J].人民珠江,DOI:10.3969/j.issn.1001-9235.XXXX.XX.001. DOI:
HU Caixia,DONG Xuan,WENG Shichuang,et al.Evolution of runoff regime in the Dongjiang River Basin and its attribution analysis[J].PEARL RIVER, DOI:10.3969/j.issn.1001-9235...001.
在全球气候变化与人类活动双重影响下,东江流域径流情势发生了显著变化,对其水资源安全保障提出了新挑战。本研究基于东江干流龙川、河源、岭下、博罗四个水文站1956—2023年实测径流序列及断面以上面雨量数据,采用水文变异诊断系统识别径流与降水的变异特征,并运用基于降雨—径流关系的归因分析方法,定量分离气候变化与人类活动对径流变异的贡献。结果表明:径流变异呈现显著的年内分配特征,枯水期径流普遍呈跳跃上升趋势,变异点集中于1968—1974年,与流域内新丰江、枫树坝、白盆珠三大水库相继运行后的枯期补水调度基本吻合;丰水期径流多呈跳跃下降趋势,变异点集中在2008、2019年,反映水库削峰及干旱调控的叠加影响。年径流序列方面,河源站与岭下站于2019年发生跳跃向下变异,年径流量显著减少,反映出流域综合管理对径流过程的调控作用。降水变异主要发生在5、6和10月,各断面变异年份表现一致,且均呈跳跃下降变异,而全年面降雨序列未发生显著变异。人类活动是驱动径流演变的主导因素,枯水期贡献率普遍超过90%,丰水期多数月份亦达80%以上;3、4月气候变化贡献率显著升高,与华南前汛期降水变率大及ENSO事件的强烈调制作用密切相关。研究成果揭示了东江流域径流演变的时空分异规律及其驱动机制,可为流域水资源优化调度、供水安全保障及适应气候变化提供科学依据。
Under the dual influences of global climate change and human activities
the runoff dynamics in the Dongjiang River Basin have undergone significant changes
posing new challenges to water resource security. Based on measured runoff sequences from 1956 to 2023 at four hydrological stations (Longchuan
Heyuan
Lingxia
and Boluo) along the main stream of the Dongjiang River
along with precipitation data above the gauging sections
this study employs a hydrological variability diagnostic system to identify the variability characteristics of runoff and precipitation. Using an attribution analysis method based on the rainfall-runoff relationship
the contributions of climate change and human activities to runoff variability were quantitatively separated. Results indicate that runoff variability exhibits distinct seasonal distribution patterns. During the dry season
runoff generally shows a jumping upward trend
with variability points concentrated between 1968 and 1974
aligning with the operational water replenishment scheduling of the Three Major Reservoirs (Xinfengjiang
Fengshuba
and Bai Puzhu) in the basin during the dry season. In contrast
runoff during the wet season mostly exhibits a jumping downward trend
with variability points concentrated in 2008 and 2019
reflecting the combined effects of reservoir flood regulation and drought control. For annual runoff sequences
the Heyuan and Lingxia stations experienced a jumping downward variability in 2019
with significant reductions in annual runoff
reflecting the regulatory role of comprehensive basin management on runoff processes. Precipitation variability primarily occurs in May
June
and October
with consistent variability years across all sections
all showing a jumping downward trend
while the annual pan-precipitation sequence did not exhibit significant variability. Human activities are the dominant driver of runoff evolution
with contribution rates exceeding 90% during the dry season and reaching over 80% in most months during the wet season. The contribution rate of climate change significantly increased in March and April
closely related to the high variability of the pre-monsoon rainfall in South China and the strong modulation effects of ENSO events. These findings reveal the spatiotemporal differentiation patterns and driving mechanisms of runoff evolution in the Dongjiang River Basin
providing a scientific basis for optimized water resource management
water supply security
and climate change adaptation in the region.
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