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Synergistic effects of multiple driving factors on the runoff variations in the Yellow River Basin,China

Journal of Arid Land 2021年第8期13卷 835-857页

作者： WANG Junjie SHI Bing ZHAO Enjin CHEN Xuguang YANG Shaopeng College of Engineering Ocean University of ChinaQingdao 266100China Hubei Key Laboratory of Marine Geological Resources China University of GeosciencesWuhan 430074China College of Ocean Science and Engineering Shandong University of Science and TechnologyQingdao 266590China

River runoff plays an important role in watershed ecosystems and human survival,and it is controlled by multiple environmental ***,the synergistic effects of various large-scale circulation factors and meteorological factors on the runoff on different time-frequency scales have rarely been *** light of this,the underlying mechanism of the synergistic effects of the different environmental factors on the runoff variations was investigated in the Yellow River Basin of China during the period 1950-2019 using the bivariate wavelet coherence(WTC)and multiple wavelet coherence(MWC)***,the continuous wavelet transform(CWT)method was used to analyze the multiscale characteristics of the *** results of the CWT indicate that the runoff exhibited significant continuous or discontinuous annual and semiannual oscillations during the study *** inter-annual time scales were also observed for the runoff in the Yellow River *** meteorological factors better explained the runoff variations on seasonal and annual time *** average wavelet coherence(AWC)and the percent area of the significant coherence(PASC)between the runoff and individual meteorological factors were 0.454 and 19.89%,*** circulation factors mainly regulated the runoff on the inter-annual and decadal time scales with more complicated phase relationships due to their indirect effects on the *** AWC and PASC between the runoff and individual circulation factors were 0.359 and 7.31%,*** MWC analysis revealed that the synergistic effects of multiple factors should be taken into consideration to explain the multiscale characteristic variations of the *** AWC or MWC ranges were 0.320-0.560,0.617-0.755,and 0.819-0.884 for the combinations of one,two,and three circulation and meteorological factors,*** PASC ranges were 3.53%-33.77%,12.93%-36.90%,and 20.67%-39.34%for the combinations one,two,and three driving facto

关键词： synergistic effects precipitation runoff variations atmospheric circulations multiple wavelet coherence Yellow River Basin

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variations and trends of trans-boundary runoff in the longitudinal range-gorge region

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Journal of Mountain Science 2017年第2期14卷 316-324页

作者： YU Yan-ling PAN Feng LIU Xin-you CHEN Wen-hua HE Da-ming Water Conservancy College Yunnan Agricultural UniversityKunming 650201China Key Laboratory of International River and Transboundary Eco-security Yunnan UniversityKunming 650091China Electric power engineering college Kunming University of Science and TechnologyKunming 650093China State Key Laboratory of hydrology water resources and hydraulic engineering Hohai UniversityNanjing 210098China Hydrology and water resources Bureau Yunnan ProvinceKunming 650106China Baoshan College Baoshan 678000China

The mountainous hydrological process usually shows high variation to climate change and human action. In the Longitudinal Range-Gorge Region（LRGR）, Southwestern China and Southeast Asian, the transboundary runoff variations are much more sensitive and complex under the interaction of climate change, ＂corridor-barrier＂ functions in LRGR,and dams building. In this paper, based on the long hydrological records（1956-2013） from three mainstream hydrological stations in Nu River,Lancang River, and Red River, the region runoff variations were analyzed. The results show out： i） the regional runoff changes were strongly influenced by the ＂Corridor-Barrier＂ functions in LRGR from west to east, the variability extent of annual runoff increased, but tended to decrease after 2009 and the reduced extents also increased; ii） the annual runoff change in the three rivers had high concentration degrees; iii） there were periodicities of 33 years of runoff change in Nu River and Lancang River, and 30 years in Red River, and the lower flow period would continue for 8-9 years in Nu River and Lancang River but only for 4 years in Red River; iv） since 2010, as the two mega dams of Xiaowan and Nuozhadu built in Lancang River mainstream, their variations of annual runoff were quite different. The research results could offer a scientific base for sustainable utilization,conservation, and management of the regional water resources

关键词： runoff variations Climate change "Corridor-barrier" functions Longitudinal rangegorge region Transboundary rivers

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Divergent responses of runoff to climate change in the upper basins of the Third Pole dominated by westerlies and monsoon

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Science China Earth Sciences 2024年第8期67卷 2592-2614页

作者： Qikai SUN Fengge SU He SUN State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100101China

The diverse climates,distribution of snow and glaciers,and geographic locations directly affect the runoff response to climate change in the upper basins of the Third *** present,a comprehensive analysis of runoff variations and their distinct responses to climate change in the westerlies-and monsoon-dominated upper basins is still *** study comprehensively analyzed annual runoff variations in westerlies-dominated basins(the upper basins of the Aksu(UAKS),Syr Darya(USRD),Yarkant(UYK),Hotan(UHT),Amu Darya(UAMD),and Indus(UI))and monsoon-dominated basins(the upper basins of the Yangtze(UYA),Yellow(UYE),Lancang(ULC),Nujiang(UNJ),and Yarlung Zangbo(UYZ))of the Third Pole from 1961 *** multi-source meteorological data and large-scale circulation factors,this study investigated the divergent responses of runoff in the upper basins to climate change,and explored the large-scale circulation mechanisms underlying runoff variations in these upper *** results showed that:(1)The annual runoff in the majority of upper basins(except for the UYE and UYZ)exhibited an increasing trend,and the annual runoff in the UAKS,UYK,and UI showed a significant increasing trend from1961 to *** annual runoff in the upper basins of the Third Pole changed abruptly from decreasing to increasing between the 1980s and 2000s,with the exception of the UYE.(2)The runoff in the monsoon-dominated upper basins has been controlled primarily by changes in precipitation over the past 55 *** contrast,the runoff in the westerlies-dominated upper basins exhibited three distinct long-term responses to climate change:temperature-dominated(UYK and UHT),precipitation-dominated(USRD and UAMD),and the combined influence of precipitation and temperature(UAKS and UI).Since the 1960s,the sensitivity of runoff to warm season temperature changes in the most westerlies-dominated upper basins has decreased,while the response of runoff to precipitation changes has intensified.(3)The stud

关键词： Upper basins of the Third Pole Climate change Westerlies and monsoon runoff variations Large-scale circulation factors

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