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Searching for an Alternative Global Order:The Qing Tributary System and the Mechanism of Guanxi
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作者 Viktor Eszterhai 《Fudan Journal of the Humanities and Social Sciences》 2018年第4期499-513,共15页
In recent years,the Chinese leadership has openly argued that the inter- national community has to exceed the dominance of the Western-based rules in international relations,since in the last two centuries these rules... In recent years,the Chinese leadership has openly argued that the inter- national community has to exceed the dominance of the Western-based rules in international relations,since in the last two centuries these rules have become globally accepted,China's claim seems to be a hardly imaginable vision.However, according to some scholars'view,there is a possible historical alternative for the international order,the so-called Chinese Tributary System,which once bounded the East and Southeast Asian states together.The present study examines whether the mainstream schools of the International Relations Theory provide an appropriate tool to understand the characteristics of this system.The study argues that the culturally based "guanxi model"can supply a better explanatory framework to understand the inner logic and the working mechanism of the Tributary System. 展开更多
关键词 GUANXI CHINESE tributary system CHINESE school of INTERNATIONAL RELATIONS INTERNATIONAL RELATIONS theory Non-Western INTERNATIONAL RELATIONS
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Analysis of the Current Water Environment Quality of Xiaoquan Tributary in Ba'nan District
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作者 Shuang HU 《Asian Agricultural Research》 2015年第3期80-81 88,88,共3页
With the class V water standards of Surface Water Quality Standards( GB3838-2002) as a basis for evaluation,this paper monitors the water quality of Hongqi Village and Hongxing Village monitoring sections in Xiaoquan ... With the class V water standards of Surface Water Quality Standards( GB3838-2002) as a basis for evaluation,this paper monitors the water quality of Hongqi Village and Hongxing Village monitoring sections in Xiaoquan tributary of Huaxi River,and uses the single factor index method for evaluation.The monitoring results show that the water quality of the two sections falls within inferior class V,and Xiaoquan tributary can not meet the water functional requirements.The main reason for pollution lies in the pollution from the upstream sewage,and it is recommended to strengthen inter-regional water pollution control coordination mechanism and effectively address river pollution problems. 展开更多
关键词 Ba’nan DISTRICT Xiaoquan tributary WATER environme
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Eutrophication model for river-type reservoir tributaries and its applications 被引量:8
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作者 Ling-ling WANG Zhen-zhen YU +1 位作者 Hui-chao DAI Qing-hua CAI 《Water Science and Engineering》 EI CAS 2009年第1期16-24,共9页
关键词 eutrophication model river-type reservoir Xiangxi River tributary algal blooms
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Use of Stream and Dismembered Stream Valleys Now Crossing Wyoming’s Northern Laramie Mountains to Test a Recently Proposed Regional Geomorphology Paradigm, USA 被引量:5
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作者 Eric Clausen 《Open Journal of Geology》 2019年第11期731-751,共21页
Detailed topographic maps show multiple stream valleys and what are probably dismembered stream valleys that extend completely across Wyoming’s northern Laramie Mountains. Several of the most obvious valleys are desc... Detailed topographic maps show multiple stream valleys and what are probably dismembered stream valleys that extend completely across Wyoming’s northern Laramie Mountains. Several of the most obvious valleys are described with valley origins first explained (or attempted to be explained) from the commonly accepted regional geomorphology paradigm (accepted paradigm) perspective and second from a recently proposed regional geomorphology paradigm (new paradigm) perspective in an effort to determine which of the two paradigms provides the simplest explanations. Accepted paradigm explanations require at least some of the valley erosion to have occurred prior to deposition of Oligocene and Miocene sediments that once covered the northern Laramie Mountains (with some of the exhumed valleys now containing sediment cover remnants). In contrast the fundamentally different new paradigm requires immense south-oriented continental ice sheet melt water floods to have crossed the region as ice sheet related crustal warping raised the region and the Laramie Mountains (and implies sediments now partially filling some of the valleys are probably flood deposited materials). The new paradigm provides simpler explanations for the origins of the valleys now extending completely across the northern Laramie Mountains and also for their related barbed tributaries, truncated side valleys, and drainage route U-turns than the accepted paradigm, although the new paradigm also leads to a fundamentally different middle and late Cenozoic regional geologic history than is currently recognized. One paradigm cannot be used to judge a different paradigm, but the paradigms can be compared based on their ability to explain evidence and Occam’s Razor can determine which of the two paradigms provides the simplest explanations. New paradigm explanations for northern Laramie Mountains valley origins investigated here require fewer assumptions than the accepted paradigm explanations suggesting the new paradigm merits serious future consideration. 展开更多
关键词 Barbed tributary Bates Hole Dugway RIM Little Medicine BOW RIVER North Platte RIVER Through Valley Wyoming
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Present Situation and Control of Outbreaks of Algal Blooms in the Three Gorges Reservoir 被引量:3
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作者 Ma Jianhua Hu Mingming Zhu Xi 《Meteorological and Environmental Research》 CAS 2016年第6期33-37,44,共6页
After water storage in the Three Gorges Reservoir Region,there are no outbreaks of algal blooms in the main stream of the reservoir region,but the density of algae increases obviously. Outbreaks of algal blooms mainly... After water storage in the Three Gorges Reservoir Region,there are no outbreaks of algal blooms in the main stream of the reservoir region,but the density of algae increases obviously. Outbreaks of algal blooms mainly appeared in the tributaries of the reservoir region such as the Xiangxi River,Daning River,Shennong River and Xiaojiang River,but they did not occur every year. The reasons for outbreaks of algal blooms in the tributaries are shown as follows: the existence of sources of algae(blue-green algae) in the Three Gorges Reservoir is the root cause,and the sources include sources existing and being produced in the reservoir and sources from upstream main stream and its tributaries and other related lakes and reservoirs,of which the sources are mainly from the Dianchi Lake; slight or moderate eutrophication of water is the basic condition;hydrologic and hydrodynamic conditions and suitable temperature are conducive to proliferation and aggregation of algae(blue-green algae) after the operation of the Three Gorges Reservoir until outbreaks of algal blooms appear. Outbreaks of algal blooms in the tributaries of the Three Gorges Reservoir Region mainly appear in backwater reaches; they mainly occur in the tributaries in the north of the reservoir region and near to the dam;they mainly appear from March to July; the dominant species of algae( blue-green algae) in the Three Gorges Reservoir are Pyrrophyta,Bacillariophyta and Chlorophyta,but they tend to change into blue-green algae and other algae. To control outbreaks of algal blooms in the tributaries of the Three Gorges Reservoir Region,it is needed to prevent water containing blue-green algae collected from the Dianchi Lake and other lakes and reservoirs from being input into the lower reaches,reduce pollution load flowing into the Three Gorges Reservoir,use enclosures to change hydrodynamic conditions of backwater reaches of the tributaries appropriately,and adopt biological measures such as culturing fish and planting plants to improve ecosystem of the tributaries and other measures to inhibit and eliminate algae and decrease eutrophication level. 展开更多
关键词 Outbreaks of ALGAL BLOOMS Control measures TRIBUTARIES The THREE Gorges RESERVOIR REGION China
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Population Characteristics and Future Population Countermeasures for the Studied Counties in Tibet, China 被引量:1
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作者 LIUJian PENGChuan-zhong +1 位作者 Xiang-mei ZHONGXiang-hao 《Wuhan University Journal of Natural Sciences》 EI CAS 2005年第4期739-744,共6页
Focusing on the 18 counties along “One River and Two Tributaries” region, and based on the data from China 3nl, 4th and 5th population censuses, this article has analyzed the time and spatial changing patterns of th... Focusing on the 18 counties along “One River and Two Tributaries” region, and based on the data from China 3nl, 4th and 5th population censuses, this article has analyzed the time and spatial changing patterns of the population in this region. The analyses show that since the 3nl population census, total population, average age and total birth rate have all changed considerably: ① Total population has grown, fast, with most counties' annual average growth rate of more than 10. ② In terms of the region's average age, in 2000 the age in the 18 counties is younger than 30 years old. ③ Compared with the 3nl population census, labor force by the 5th census is much younger. ④ Countermeasures are proposed to control population by controlling birth rate as the result of the local resident's quality improvement by education. 展开更多
关键词 Key words average age total birth rate dependency index population development countermeasures One River and Two Tributaries region TIBET
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Yampa River-Colorado River Drainage Divide Origin Determined from Topographic Map Evidence, Southern Routt County, Colorado, USA 被引量:2
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作者 Eric Clausen 《Open Journal of Geology》 2021年第8期319-339,共21页
Detailed topographic map evidence and a new Cenozoic geologic and glacial history paradigm are used to determine the previously unexplained Yampa River-Colorado River drainage divide origin. The Yampa River now flows ... Detailed topographic map evidence and a new Cenozoic geologic and glacial history paradigm are used to determine the previously unexplained Yampa River-Colorado River drainage divide origin. The Yampa River now flows in a north direction away from the Colorado River (between the Park Range to the east and the Flat Tops region to the west) before turning in a west direction to reach the Unita Mountains where it joins the south-oriented Green River, which eventually joins the southwest-oriented Colorado River. Topographic maps show the Yampa-Colorado River drainage divide is asymmetric with steeper slopes leading to the Colorado River, barbed (south-oriented) tributaries leading to north-oriented Yampa River headwaters (especially near the Yampa River turn to the west), and evidence of a large north-to-south oriented diverging and converging channel complex that preceded present-day drainage routes. Map evidence is interpreted to mean massive south-oriented floods flowed through what are now north-oriented Yampa River headwaters valleys and that headward erosion of a deep west-oriented valley beheaded and reversed those south-oriented flood flow channels to create the north-oriented Yampa River headwaters and the Egeria Park area Yampa-Colorado River drainage divide seen today. Large south-oriented floods leading to the Colorado River (while regional uplift was occurring) are inconsistent with accepted Cenozoic geologic and glacial history paradigm predictions, but are predicted by a newly proposed Cenozoic geologic and glacial history paradigm in which a thick continental ice sheet created a deep “hole” by eroding underlying bedrock and also by causing crustal warping that raised the present-day northern Colorado east-west continental divide as immense south-oriented meltwater floods flowed across it. 展开更多
关键词 Barbed Tributaries Diverging and Converging Channel Complex Egeria Park Flat Tops Region Geologic and Glacial History Paradigms Park Range
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从国家礼品到民间用器——明清广锅的海外贸易 被引量:3
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作者 罗一星 《海洋史研究》 2021年第1期282-297,共16页
明永乐年间郑和宝船将广锅带到海外,奠定了广锅在海外国家王室、首领心目中的明朝国家品牌地位。海外诸国对中国铁器的追求,强化了明代朝贡体系的核心聚合作用。清代康熙开海,广锅成为海外诸国商舶贸易的主要商品,出口贸易一度达到历史... 明永乐年间郑和宝船将广锅带到海外,奠定了广锅在海外国家王室、首领心目中的明朝国家品牌地位。海外诸国对中国铁器的追求,强化了明代朝贡体系的核心聚合作用。清代康熙开海,广锅成为海外诸国商舶贸易的主要商品,出口贸易一度达到历史高峰。与此同时,广锅在海外的消费群体也从王室贵族扩大到民间百姓,由象征身份等级的王室奢侈品变为家居必备用品。五口通商后,广锅又随广府华侨群体出口美国旧金山和澳洲新金山,并在美国修铁路的华工群体中继续发挥作用。本文通过对明清两代重大历史节点与广锅出口之间关系的考察,重构广锅从国家礼品到民间用器的变迁过程,阐述广锅在海外诸国物质文明进程中产生的作用。 展开更多
关键词 Guang Wok tributary COLLECTION Overseas Trade
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Influence of tributaries on downstream bed sediment grain sizes under flysch conditions
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作者 SMAZAK Ivan GALLA Tomas 《Journal of Mountain Science》 SCIE CSCD 2021年第4期847-862,共16页
Tributaries are one of the most important factors contributing to variability in the downstream evolution of bed sediment grain size.The primary aim of this work is to evaluate the response of the bed sediment texture... Tributaries are one of the most important factors contributing to variability in the downstream evolution of bed sediment grain size.The primary aim of this work is to evaluate the response of the bed sediment texture in the recipient channel induced by ten tributaries of the?ernáOstravice stream and find reach-scale and catchment-scale parameters that would be able to predict this response.The research was based on collecting information on the grain size distributions at sites adjacent to confluence zones.A significant change in sediment texture occurred in the vicinity of five confluences.Considering the other factors contributing to grain size variability(e.g.,local channel geometry,lithology,and lateral sediment sources),it was assumed that only four of them were associated with a sufficient bedload influx to alter the sediment calibre below the junction.Moreover,a significant morphological effect in the form of a large confluence bar was observed in one case.These tributaries had several common features:(i)they had a larger relative catchment area than that of nonsignificant tributaries;(ii)they were characterized by different bed grain sizes,with some exceptions;and(iii)they had a higher unit stream power close to the confluence in relation to that of the mainstream.These characteristics were represented by the proposed relative parameters,including the relative unit stream power and bed material texture,which allowed the best classification of significant and nonsignificant tributaries.In their simplified form,the parameters described the transport capacity and grain size distribution,which were generally considered to be primary factors responsible for a redefinition of the sediment texture in the recipient channel.However,it should be noted that these results are subject to some degree of uncertainty due to the relatively small sample size of only 10 tributaries. 展开更多
关键词 tributary Bed sediments Headwater streams Flysch Carpathians
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An Analysis of Labor Resources “One River and Two Tributaries” Region in Tibet, China
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作者 PENGChuan-zhong LIXiang-mei +1 位作者 LIUJian ZHONGXiang-hao 《Wuhan University Journal of Natural Sciences》 CAS 2005年第4期751-758,共8页
Focusing on the region of Yarlung Zangbo River and the middle reaches of itstwo tributaries of Nianchu River and Lhasa River in Tibet (Hereafter referred to as the 'One Riverand Two Tributaries' region), and b... Focusing on the region of Yarlung Zangbo River and the middle reaches of itstwo tributaries of Nianchu River and Lhasa River in Tibet (Hereafter referred to as the 'One Riverand Two Tributaries' region), and based on the data from China 3rd, 4th and5th population censuses,the article has analyzed change patterns of this region' s labor force. Major findings from thestudy are summarized as follows; (1) Compared with the data from the 3rd census, labor forcepopulation in 2000 has increased significantly. (2) Children dependency coefficient has dropped,while old people dependency coefficient has changed very slightly with an increase of 0. 047% only.(3) Compared 2000 with 1982, illiteracy and semi-illiteracy rate of the population above 15 yearsold have decreased significantly by 30. 69 percentage points, but still higher than the nationalaverage. (4) Women' s illiteracy rate has dropped faster than men's, but up to 2000 it was generallyquite high. The upgrading of the entire population's overall quality has a long way to go. 展开更多
关键词 labor force resources children dependency coefficient old people dependencycoefficient labor force' s education level One River and Two Tributaries region
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Tracking PCB Contamination in Ontario Great Lakes Tributaries: Development of Methodologies and Lessons Learned for Watershed Based Investigations
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作者 Nadine Benoit Alice Dove +1 位作者 Debbie Burniston Duncan Boyd 《Journal of Environmental Protection》 2016年第3期390-409,共20页
Project Trackdown is an investigative environmental program aimed at tracking sources of polychlorinated biphenyl (PCB) contamination in Great Lakes tributaries. The program uses a multimedia weight of evidence approa... Project Trackdown is an investigative environmental program aimed at tracking sources of polychlorinated biphenyl (PCB) contamination in Great Lakes tributaries. The program uses a multimedia weight of evidence approach for identifying sources of PCBs to the environment. PCB concentrations in environmental media (sediment, water, suspended sediment and soil), passive samplers and/or exposed biota (mussels, young-of-the-year fish and benthic invertebrates) are used in combination to evaluate bioavailability and identify local anomalies within a tributary. These lines of evidence can be assessed with simple chemometric techniques and fingerprinting of PCB congener profiles, and, combined with anecdotal information such as land use history and tributary alterations, may be used to identify ongoing and locally controllable sources of PCBs to the Great Lakes. The program was successful at developing environmental triggers to differentiate potential source areas from background PCB conditions in urban areas, allowing efforts to focus on identifying active ongoing sources of PCB contamination. Project Trackdown has been carried out in three tributaries to Lake Ontario (Cataraqui River, Etobicoke Creek and Twelve Mile Creek) and two tributaries that flow into the Detroit River (Turkey Creek and Little River). Local ongoing PCB sources have been identified in four projects, leading to abatement or remediation measures. As a collaborative initiative between the Ontario Ministry of the Environment and Environment Canada, Project Trackdown has successfully identified several PCB sources leading to substantial cleanup efforts aimed ultimately at reducing PCB contamination to the Great Lakes. 展开更多
关键词 Source Tracking PCBS Great Lakes Tributaries
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TributariesC2SX复合视频/S-Video转接头
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《实用影音技术》 2003年第10期5-5,共1页
关键词 Tributaries公司 复合视频/S-Video 转接头 无源转换电路
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The Chinese Reception of Western Marxism:From Wary Onlookers to Confident Participants on the World Stage
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作者 Roland Boer 《Fudan Journal of the Humanities and Social Sciences》 2024年第1期1-22,共22页
This study presents an analytic overview of forty years of study of Western Marxism by Chinese scholars.Organised into four main sections,it begins with an emphasis on the wider institutional context of this Chinese r... This study presents an analytic overview of forty years of study of Western Marxism by Chinese scholars.Organised into four main sections,it begins with an emphasis on the wider institutional context of this Chinese research.Here,I deal with the beginnings of research on Western Marxism in China and outline the two main periods of this research,which turn on the important educational reforms of 2005.The next section focuses on the initial period of research on Western Marxism,from the early 1980s to the education reforms,which may be characterised in terms of the work of“wary onlookers”writing introductions and surveys of Western Marxist scholars.The following section covers the last two decades after the 2005 education reforms.This period is of most interest,so more attention is devoted to developments during this time.It has been a time of increasingly confident participants on the world stage,who focus on core issues,realistic demands,and problem-based research.The final section concerns assessments of the limitations of Western Marxism,which have been identified through the in-depth research of the second period.In conclusion,while Western Marxism may be seen as a legitimate development of Marxism in a capitalist context,it is a tributary from the mainstream. 展开更多
关键词 Western Marxism Chinese scholarship 2005 education reforms Wary onlookers Confident global participants Mainstream and tributary
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Spatio-temporal patterns of zooplankton in a main-stem dam affected tributary: a case study in the Xiangxi River of the Three Gorges Reservoir, China 被引量:5
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作者 Xinghao Li Jie Huang +4 位作者 Sabine Filker Thorsten Stoeck Yonghong Bi Yuhe Yu Weibo Song 《Science China(Life Sciences)》 SCIE CAS CSCD 2019年第8期1058-1069,共12页
As the ecologically important recipient channels for riverine ecosystems, tributaries provide unique microhabitats for microorganisms, among which zooplankton constitutes the most important heterotrophic organisms. In... As the ecologically important recipient channels for riverine ecosystems, tributaries provide unique microhabitats for microorganisms, among which zooplankton constitutes the most important heterotrophic organisms. In particular, the reduced water velocity caused by dams is more favorable for zooplankton development;therefore, dammed rivers are expected to support extremely diverse and abundant zooplankton communities and notably different spatiotemporal distribution patterns. So far,however, only very few molecular studies support these assumptions. Using high-throughput sequencing, a high number of 350 operational taxonomic units(OTUs;97% cutoff) were retrieved from 30 samples collected in the Xiangxi River, the nearest large tributary upstream of the Three Gorges Dam. Zooplankton did not show significant spatial distribution in the channel. Instead,the community structures varied significantly over sampling dates, corroborating the seasonal patterns found in lakes and ponds in the subtropical zone. As expected, the community compositions were deterministically governed by environmental filtering processes(phylogenetic clustering), in which water velocity appeared to be much less important than other investigated environmental factors. Moreover, most of the detected phylotypes(OTUs) had a relatively high(>90%) sequence similarity to previously deposited sequences, suggesting a mediocre degree of genetic novelty within the zooplankton communities in the Xiangxi River. 展开更多
关键词 ZOOPLANKTON high-throughput sequencing spatiotemporal distribution genetic novelty tributary main-stem DAM
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From Defensive Realism to Hegemonic Stability: Explainingthe Interactions Between the Imperial China andthe Surrounding Regimes
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作者 Weizhan Meng 《Fudan Journal of the Humanities and Social Sciences》 2023年第4期455-475,共21页
What recurring pattern did the interactions between imperial China and the sur-rounding regimes follow?When imperial China was economically prosperous,what kind of policies did it generally adopt toward others?The&quo... What recurring pattern did the interactions between imperial China and the sur-rounding regimes follow?When imperial China was economically prosperous,what kind of policies did it generally adopt toward others?The"Confucian long peace"continuously proclaimed by many international relations scholars and some historians may not stand up to empirical testing.The research finds that the rela-tionship between the four major dynasties of imperial China,i.e.,the Han,Tang,Ming,and Qing dynasties,and their surrounding regimes as well as their relation-ship with nomadic empires were not always peaceful.During the prosperous age of each dynasty,defensive realism more or less explained the state behavior of impe-rial China.As its economic power increased,the frequency of China's use of force also increased dramatically.As the frequency of wars greatly decreased with the end of the prosperous age,the long peace between imperial China and the surrounding regimes can be explained by the theory of hegemonic stability.This research helps us understand contemporary China's foreign relations and state behavior. 展开更多
关键词 Defensive realism Hegemonic stability China pacifism Confucian long peace tributary system
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Zinc Isotope Characteristics in the Biogeochemical Cycle as Revealed by Analysis of Suspended Particulate Matter(SPM) in Aha Lake and Hongfeng Lake, Guizhou, China 被引量:4
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作者 Lili Liang Cong-Qiang Liu +4 位作者 Xiangkun Zhu Bryne TNgwenya Zhongliang Wang Liuting Song Jin Li 《Journal of Earth Science》 SCIE CAS CSCD 2020年第1期126-140,共15页
Zn isotope is a useful tool for tracing biogeochemical processes as zinc plays important roles in the biogeochemistry of natural systems. However, the Zn isotope composition in the lake ecosystems has not been well ch... Zn isotope is a useful tool for tracing biogeochemical processes as zinc plays important roles in the biogeochemistry of natural systems. However, the Zn isotope composition in the lake ecosystems has not been well characterized. In order to resolve this problem, we investigate the Zn isotope compositions of suspended particulate matter(SPM) and biological samples collected from the Aha Lake and Hongfeng Lake, and their tributaries in summer and winter, aiming to explore the potential of this novel isotope system as a proxy for biogeochemical processes in aqueous environments. Concentration of dissolved Zn ranges from 0.65 to 5.06 μg/L and 0.74 to 12.04 μg/L for Aha Lake and Hongfeng Lake, respectively, while Zn(SPM) ranges from 0.18 to 0.70 mg/g and 0.24 to 0.75 mg/g for Aha Lake and Hongfeng Lake, respectively. The Zn isotope composition in SPM from Aha Lake and its main tributaries ranges from -0.18‰ to 0.27‰ and -0.17‰ to 0.46‰, respectively, and it varies from -0.29‰ to 0.26‰ and -0.04‰ to 0.48‰, respectively in Hongfeng Lake and its main tributaries, displaying a wider range in tributaries than lakes. These results imply that Zn isotope compositions are mainly affected by tributaries inputting into Aha Lake, while adsorption process by algae is the major factor for the Zn isotope composition in Hongfeng Lake, and ZnS precipitation leads to the light Zn isotope composition of SPM in summer. These data and results provide the basic information of the Zn isotope for the lake ecosystem, and promote the application of Zn isotope in biogeochemistry. 展开更多
关键词 Zn isotope SPM Aha Lake Hongfeng Lake tributary
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长江通过江湖水文水动力交互对其支流水域东洞庭湖的影响(英文) 被引量:4
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作者 戴雪 杨桂山 +1 位作者 万荣荣 李彦彦 《Journal of Geographical Sciences》 SCIE CSCD 2018年第8期1072-1084,共13页
The blocking or reversing effect of the downstream trunk river on its tributary lakes is an essential aspect of river-lake hydraulics. To measure how and the extent to which a trunk river can influence its tributary l... The blocking or reversing effect of the downstream trunk river on its tributary lakes is an essential aspect of river-lake hydraulics. To measure how and the extent to which a trunk river can influence its tributary lakes, we made a case study in Changjiang River and one of its tributary lakes, Lake East Dongting (Lake ED) during a 35-year study period (1980-2014). Specifically, we investigated Lake ED's discharge ability into Changjiang River using stage-discharge relationship curves, and hence the changes of the lake discharge abil- ity under different hydrologic conditions of the Changjiang River. The results show that (1) the Changjiang River does exert a huge impact on the water regimes of Lake ED. And this impact varies seasonally. A variation of 3000 m3/s in Changjiang River's runoff would change the lake water level by about 1.1 m in dry seasons, by 0.4 m in wet seasons, and by 0.6 m during severe summer floods. (2) Changes in the Changjiang River runoff triggered by the Three Gorges Dam since 2003 have led to dramatic water regime variations in Lake ED. Other factors, including reduction of lake inflow and the lake bed erosion, also exacerbated the water regime variations in Lake ED. 展开更多
关键词 trunk river tributary lake Changjiang River Lake East Dongting stage-discharge relationship curve
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Microtopographic modification conserves urban wetland water quality by increasing the dissolved oxygen in the wet season 被引量:1
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作者 Yali Liu Jianqing Du +2 位作者 Panpan Hu Mingzhu Ma Dan Hu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2020年第1期71-81,共11页
Microtopography affects hydrological processes and forms different microhabitats.Our previous study uncovered that riparian zone microtopography created various microhabitats with different soil environments and runof... Microtopography affects hydrological processes and forms different microhabitats.Our previous study uncovered that riparian zone microtopography created various microhabitats with different soil environments and runoff-infiltration patterns.However,how riparian microtopography and microtopography within the water area(waterfall and tributary)affects downstream water quality remains unclear.Therefore,water samples were taken almost monthly in both the main stream and the tributary,before and after waterfalls,and near the bottom of three microtopographic types from June 2016 to March 2017.Compared with the dry season,the fact that water quality worsened in the wet season and that there were positive correlations for nitrate(NO3-)between water and the corresponding soil samples suggested that the riparian-soil environment affected the adjacent water quality mainly in the wet season.Nevertheless,riparian microtopography did not influence water quality downstream because of the low rainfall frequency and the weak leaching process due to plant interception.In the wet season,both the tributary and the waterfall increased the dissolved oxygen in the water body and,therefore,lowered the risk of eutrophication.The tributary has two pathways for improving the water quality,by increased disturbance and flow velocity,while the waterfall only has the former.However,such effects were not significant in the dry season.We conclude that the application of microtopographic modification is useful in maintaining urban wetland water quality in wet seasons. 展开更多
关键词 Microtopographic modification Wetland water quality tributary WATERFALL EUTROPHICATION
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