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Late Mesozoic Exhumation of the Huangling Massif:Constraints on the Evolution of the Middle yangtze river

Acta Geologica Sinica(English Edition) 2024年第1期98卷 250-264页

作者： SU Jianchao LIN Xu LI Chang’an Jolivet MARC WU Lin CHENG Feng DENG Bin WU Zhonghai CHEN Xiaokang HU Chengwei School of Geography and Information Engineering China University of GeosciencesWuhan 430074China College of Civil Engineering and Architecture China Three Gorges UniversityYichangHubei 443002China Géosciences Rennes CNRS-UMR6118Univ RennesRennesFrance State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBejing 100029China Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of EducationSchool of Earth and Space SciencesPeking UniversityBeijing 100871China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation/Chengdu University of Technology Chengdu 100871China Institute of Geological Mechanics Chinese Academy of Geological ScienceBeijing 100081China

Plate subduction leads to complex exhumation processes on continents.The Huangling Massif lies at the northern margin of the South China Block.Whether the Huangling Massif was exhumed as a watershed of the middle reaches of the Paleo-yangtze river during the Mesozoic remains under debate.We examined the exhumation history of the Huangling Massif based on six granite bedrock samples,using apatite fission track(AFT)and apatite and zircon(U-Th)/He(AHe and ZHe)thermochronology.These samples yielded ages of 157–132 Ma(ZHe),119–106 Ma(AFT),and 114–72 Ma(AHe),respectively.Thermal modeling revealed that three phases of rapid cooling occurred during the Late Jurassic–Early Cretaceous,late Early Cretaceous,and Late Cretaceous.These exhumation processes led to the high topographic relief responsible for the emergence of the Huangling Massif.The integrated of our new data with published sedimentological records suggests that the Huangling Massif might have been the watershed of the middle reaches of the Paleo-yangtze river since the Cretaceous.At that time,the rivers flowed westward into the Sichuan Basin and eastward into the Jianghan Basin.The subduction of the Pacific Plate beneath the Asian continent in the Mesozoic deeply influenced the geomorphic evolution of the South China Block.

关键词： apatite zircon (U-Th)/He fission track Huangling Massif yangtze river

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Linkage between riverbed scouring or deposition and the evolution of central bars:Case study in the Yangzhong reach of the yangtze river

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Journal of Geographical Sciences 2024年第7期34卷 1323-1348页

作者： YANG Yunping ZHANG Xiabo FENG Xiaoxiang HAN Jianqiao WANG Jianjun ZHU Yude YANG Yanhua Tianjin Research Institute for Water Transport Engineering Ministry of Transport College of Harbour Coastal and Offshore Engineering Hohai University Northwest Agriculture and Forestry University

Understanding the relationship between unbalanced riverbed scouring or deposition and the evolution of central bars in natural conditions and human activity is useful for river regime control and waterway improvement projects. Toward this end, we utilized the Yangzhong reach in the lower reaches of the yangtze river as a case study and evaluated runoff,sediment content, and topographical data measured over the past 70 years（1951–2021）.With the decrease in the amount of incoming sediment in the river basin, the Yangzhong reach exhibited a continuous state of scouring. The cumulative riverbed scouring volumes of the low-water and flood channels from 1981 to 2021 were 3.97×108 and 4.14×10～8 m3, respectively, with the riverbed scouring volume of the low-water channel accounting for 95.9%of that of the flood channel. Under quasi-natural runoff–sediment conditions, the evolution of the central bars in the Yangzhong reach was highly correlated with the amount of scouring or deposition. In particular, the Luochengzhou reach could be characterized as a meandering river with scouring on concave riverbanks and deposition on convex riverbanks. In the context of reduced incoming sediment, the beach area of the Yangzhong reach decreased by approximately 9.9%（from 2003 to 2021） and the central bars of the straight section areas decreased. Moreover, following operation of the Three Gorges Reservoir, both the Luocheng central bar and Jiangyin beach areas could be characterized as meandering rivers with convex riverbanks and beaches. In the quasi-natural period before the implementation of the waterway improvement project, the trend of high scouring intensity and increased fluid diversion ratio in the right branch of the Luocheng central bar was in accordance with the law that the short branch of the length is in a developing state under the condition of decreasing river sediment volume. With the control of riverbank protection and the construction of waterway improvement projects in the Yangzhong reach, the shapes of the riverban

关键词： riverbed scouring or deposition beach morphology linkage relationship causal analysis tidal reach yangtze river

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Anthropogenic activity,hydrological regime,and light level jointly influence temporal patterns in biosonar activity of the yangtze finless porpoise at the junction of the yangtze river and Poyang Lake,China

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动物学研究(英文) 2023年第5期44卷 919-931页

作者： Peng-Xiang Duan Zhi-Tao Wang Tomonari Akamatsu Nick Tregenza Guang-Yu Li Ke-Xiong Wang Ding Wang College of Fisheries Huazhong Agricultural UniversityWuhanHubei 430070China School of Marine Science Ningbo UniversityNingboZhejiang 315832China Key Laboratory of Aquatic Biodiversity and Conservation Institute of HydrobiologyChinese Academy of SciencesWuhanHubei 430072China Ocean Policy Research Institute Sasakawa Peace FoundationMinato-kuTokyo 105-8524Japan Chelonia Limited The BarkhouseNorth CliffMousehole TR196PHUK

Under increasing anthropogenic pressure,species with a previously contiguous distribution across their ranges have been reduced to small fragmented populations.The critically endangered yangtze finless porpoise(Neophocaena asiaeorientalis asiaeorientalis),once commonly observed in the yangtze river-Poyang Lake junction,is now rarely seen in the river-lake corridor.In this study,static passive acoustic monitoring techniques were used to detect the biosonar activities of the yangtze finless porpoise in this unique corridor.Generalized linear models were used to examine the correlation between these activities and anthropogenic impacts from the COVID-19 pandemic lockdown and boat navigation,as well as environmental variables,including hydrological conditions and light levels.Over approximately three consecutive years of monitoring(2020–2022),porpoise biosonar was detected during 93%of logged days,indicating the key role of the corridor for finless porpoise conservation.In addition,porpoise clicks were recorded in 3.80%of minutes,while feeding correlated buzzes were detected in 1.23%of minutes,suggesting the potential existence of localized,small-scale migration.Furthermore,both anthropogenic and environmental variables were significantly correlated with the diel,lunar,monthly,seasonal,and annual variations in porpoise biosonar activities.During the pandemic lockdown period,porpoise sonar detection showed a significant increase.Furthermore,a significant negative correlation was identified between the detection of porpoise click trains and buzzes and boat traffic intensity.In addition to water level and flux,daylight and moonlight exhibited significant correlations with porpoise biosonar activities,with markedly higher detections at night and quarter moon periods.Ensuring the spatiotemporal reduction of anthropogenic activities,implementing vessel speed restrictions(e.g.,during porpoise migration and feeding),and maintaining local natural hydrological regimes are critical factors for sustaining porpoise population via

关键词： yangtze finless porpoises yangtze river Poyang Lake Pandemic lockdown Boat traffic Hydrological regime Light level

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Relationship between adjustment of low water level and utilization of water depth in Shashi Reach in middle yangtze river

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Water Science and Engineering 2022年第2期15卷 114-124页

作者： Juan-juan Fang Yun-ping Yang Meng-lin Jia Yu-de Zhu Jian-jun Wang State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan 430072China Tianjin Research Institute for Water Transport Engineering Ministry of TransportTianjin 300456China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210098China

Hydrological,sediment,and bathymetric data of the Shashi Reach in the middle yangtze river for the period of 1975-2018 were collected,and the characteristics of low water level changes and their impacts on utilization of water depth for navigation were investigated.The results showed that,during the study period,the Shashi Reach riverbed was significantly scoured and incised,with cross-sectional profiles showing overall narrowing and deepening.This indicated a strong potential to improve the water depth of the channel.The analysis of the temporal variation of in-channel topographical features showed that the Taipingkou diara underwent siltation and erosion,with its head gradually scoured and relocated downstream after 2008,and the Sanbatan diara continued to shrink and migrate leftwards.Low water levels with the same flow rate over the study period decreased.For instance,from 2003 to 2020,the water level at the Shashi hydrological station decreased to 1.37 m with a flow rate of 6000 m^(3)/s.Furthermore,the designed minimum navigable water level of the Shashi Reach was approximately 2.11m lower than the recommended level.In terms of utilization of the channel water depth,continuous scouring of the river channel is expected to result in a reduction in discharge at the Taipingkou mouth,which will improve the water depth conditions of the channel during the dry season in the Shashi Reach.With several channel regulation projects,the 3.5-m depth of the Shashi Reach would basically be unobstructed.This promotes utilization of the shipping route from the Taipingkou south branch to the Sanbatan north branch as the main navigation channel during the dry season.Considering the factors of current water depth and the clear width limitation of the navigation hole at the Jingzhou yangtze river Bridge,this route can still be favored as the main navigation channel with a 4.5-m depth during the dry season.

关键词： Low water level Shoal evolution Channel water depth utilization Shashi Reach yangtze river

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A Precursory Signal of June-July Precipitation over the yangtze river Basin: December-January Tropospheric Temperature over the Tibetan Plateau

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Advances in Atmospheric Sciences 2023年第11期40卷 1986-1997页

作者： Xiaying ZHU Mingzhu YANG Ge LIU Yanju LIU Weijing LI Sulan NAN Linhai SUN National Climate Center Beijing 100081China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China Collaborative Innovation Centre on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and TechnologyNanjing 210044China

The prediction of summer precipitation over the yangtze river basin(YRB)has long been challenging,especially during June-July(JJ),when the mei-yu generally occurs.This study explores the potential signal for the YRB precipitation in JJ and reveals that the Tibetan Plateau tropospheric temperature(TPTT)in the middle and upper levels during the preceding December-January(DJ)is significantly correlated with JJ YRB precipitation.The close connection between the DJ TPTT anomaly with JJ YRB precipitation may be due to the joint modulation of the DJ ENSO and spring TP soil temperatures.The lagged response to an anomalously cold TPTT during the preceding DJ is a TPTT that is still anomalously cold during the following JJ.The lower TPTT can lead to an anomalous anticyclone to the east of Lake Baikal,an anomalous cyclone at the middle latitudes of East Asia,and an anomalous anticyclone over the western North Pacific.Meanwhile,the East Asian westerly jet shifts southward in response to the meridional thermal gradient caused by the colder troposphere extending from the TP to the east of Lake Baikal.The above-mentioned circulation anomalies constitute the positive anomaly of the East Asia-Pacific pattern,known to be conducive to more precipitation over the YRB.Since the DJ TPTT contains both the land(TP soil temperature)and ocean(ENSO)signals,it has a closer relationship with the JJ precipitation over the YRB than the DJ ENSO alone.Therefore,the preceding DJ TPTT can be considered an alternative predictor of the JJ YRB precipitation.

关键词： Tibetan Plateau thermal condition yangtze river precipitation prediction

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Sediment budget and riverbed deformation in the uppermost part of the lower yangtze river, China

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International Journal of Sediment Research 2022年第4期37卷 484-492页

作者： Shuwei Zheng Huanlong Luo Jiayue Zhang Heqin Cheng Zijun Li Yugai Ma Shuaihu Wu Enfeng Liu College of Geography and Environment Shandong Normal University College of Resources and Environmental Sciences Shijiazhuang University State Key Lab of Estuarine & Coastal Research East China Normal University School of Resources Environment and Tourism Anyang Normal University

The yangtze river(YR), similar to most large rivers in the world, has experienced significant changes in its depositional environment due to anthropogenic disturbances and climatic influences in recent decades. However, knowledge of how the river channel and bed deformation respond to these changes in the uppermost part of the lower YR, a 200-km-long branched channel, is limited. In the current study,historical bathymetric data collected from 1992 to 2013 and high-resolution multibeam echo sounder(MBES) data obtained from 2015 to 2016 were analyzed to address the changes in the depositional environment. The results indicate that the whole riverbed in the Hukou to Datong reach(HDR) has been scouring over the past two decades and this trend is expected to continue in the future due to decreasing sediment supply from the upper watershed. The amount of net erosion from the HDR during 1992-2013approximately accounted for 7.2% of total sediment load in the yangtze river(5.02 billion metric tons at Datong). The evolution of the riverbed is trending towards stabilization even though the patterns of erosion and/or deposition in the HDR have dramatically changed in the last two decades. The part of the channel from the upper 100 km to Datong was found to be a sensitive reach that first showed erosion from 1992 to 2003 and showed deposition during 2003-2008, and then mild erosion during 2008-2013in response to environmental changes. Thus, the findings indicate that riverine channel deformation in response to anthropogenic disturbance and climate influence is dynamic in different reaches, and this finding has both scientific and practical significance in terms of understanding channel stability and its response to external stressors.

关键词： Depositional environment Channel deformation Anthropogenic disturbance Three Gorges dam yangtze river

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Distribution, characteristics, and research status of microplastics in the trunk stream and main lakes of the yangtze river: A review

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China Geology 2022年第1期5卷 171-184页

作者： Fang-ting Wang Ke Bao Chang-sheng Huang Rui-ping Liu Wen-jing Han Cheng-yun Yi Long Li Yun Zhou Wuhan Center China Geological SurveyMinistry of Natural ResourcesWuhan 430205China Safety Center for river and Lake Protection Construction and OperationChangjiang Water Resources Commission of the Ministry of Water ResourcesWuhan 430015China Xi’an center China Geological SurveyMinistry of Natural ResourcesXi’an 710054China Institute of Geological Survey China University of Geosciences(Wuhan)Wuhan 430074China

Microplastic pollution has become an environmental issue of great concern owing to the persistence of microplastics and their potential adverse effects on biota.The yangtze river is the longest river in China and the third-longest river in the world,and the microplastics in this river will affect the health of a large population living along with it.To ensure the survival safety of people,it is essential to plan ahead and investigate in advance in order to understand the microplastic pollution in the river and work out countermeasures.This paper reviews the literature concerning the microplastic pollution in the yangtze river basin and analyzes the abundance,shapes,colors,and composition of microplastics in the water bodies and sediments in the trunk stream and main lakes of the yangtze river.The results are as follows.Compared to other river basins in China and abroad,the microplastics in the yangtze river basin have a moderate abundance and high spatial heterogeneity.Owing to the barrier effect of the Three Gorges Dam on microplastics,the abundance of microplastics in the Three Gorges Reservoir is generally an order of magnitude higher than that in other sections of the river.Most microplastics in the water bodies and sediments are less than 1 mm in size and are transparent and colorful.In terms of shapes,they are dominated by fibers,followed by fragments and films.In terms of composition,the microplastics in the source region of the yangtze river are mainly composed of nylon and polyethylene,while the microplastics in the surface water from the lower reaches of the Jinsha river to the yangtze river estuary are dominated by polypropylene and polyethylene.The microplastics are primarily derived from the secondary microplastics in the environment,and relatively intensive human activities increase the abundance of microplastics.These results serve as bases for understanding and preventing microplastic pollution in the yangtze river.

关键词： Microplastics Surface water Sediment Freshwater Spatial distribution Hydrogeological survey engineering yangtze river China

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退耕还林和气候变化对长江流域土壤侵蚀减少的影响

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Journal of Geographical Sciences 2024年第3期34卷 527-542页

作者：李柏延王昀琛 School of Geography and Tourism Shaanxi Normal UniversityXi’an710119China School of Computer Science and Technology Xi’an University of Posts and TelecommunicationsXi’an710121China

The area of land that is affected by soil erosion in the yangtze river has been reduced by 146,000 km~2(accounting for 27%of the entire yangtze river)since 2000.However,the contributions of different tributaries to this soil erosion decline and the underlying causes have not been determined.Here we quantify the soil erosion decline in the yangtze river and the impacts of the Grain-for-Green Programme(GFGP)and climate change using the RUSLE model and statistical methods.The results were as follows:(1)After the implementation of the GFGP,soil erosion decreased in ten sub-basins excluding the Dongting Lake catchment;(2)Soil erosion was mainly affected by the GFGP and the rainfall erosivity.Specifically,the contributions of the GFGP and rainfall erosivity to soil erosion decline are estimated to be 70.12%and 29.88%,respectively.(3)“Scenario#9”means the combination of slope(15°-25°)of retired farmland converted to shrub land and slope(>25°)of retired farmland converted to grassland.Considering scenario feasibility and management targets,Scenario#9 was the most appropriate land use scenario for the yangtze river.This study offers insights into managing and reducing soil erosion in the future.

关键词： soil erosion RUSLE model Grain for Green Programme climate change yangtze river

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Change patterns of oncomelanid snail burden in areas within the yangtze river drainage after the three gorges dam operated

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Infectious Diseases of Poverty 2019年第3期8卷 64-71页

作者： Si-Min Dai Jeffrey Edwards Zhou Guan Shan Lv Shi-Zhu Li Li-Juan Zhang Jun Feng Ning Feng Xiao-Nong Zhou Jing Xu National Institute of Parasitic Diseases Control and Prevention Chinese Center for Disease Control and Prevention207 Ruijin Er RoadShanghai 200025China Key Laboratory of Parasite and Vector Biology Ministry of HealthWHO Collaborating Centre for Tropical DiseasesNational Tropical Disease Research Center207 Ruijin Er RoadShanghai 200025China Department of Global Health University of WashingtonSeattleWashingtonUSA Center for Global Public Health Chinese Center for Disease Control and PreventionRoom 211155 Changbai RoadChangping DistrictBeijing 102206China Center of Disease Control and Prevention of Henan Province 105 Nongyenan RoadZhengzhou 450016HenanChina

Background:An"integrated control"strategy has been implemented within seven provinces at highest risk for schistosomiasis along yangtze river in Peoples'Republic of China(P.R.China)since 2004.Since O ncom elania hupensis is the only intermediate host of the blood fluke(Schistosom a japonicum),controlling the distribution of snails is considered an essential and effeaive way to reduce the risk of schistosomiasis infection.The study aimed to determine the snail area burden and annual trend among provinces with potential risk for schistosomiasis along the yangtze river,above and below the Three Gorges Dam(TGD).Methods:This retrospective study utilized data previously collected from the National Parasitic Diseases Control Information Management System(NPDCIMS)on annual snail surveys from 2009 to 2017.Descriptive statistics were performed for analyzing the snail burden by provinces,counties,type of environmental location and year,and mapping was conducted to present the snails distribution.Results:From 2009 to 2017,the total snail infested area decreased by 4.22%,from 372253 hm^2 to 356553 hm^2 within the seven high risk provinces.The majority of snails were found in the marshland and lake regions,outside of control embankments.The total snail burden trend remained relatively stable in upstream regions above the TGD from 2010 to 2015,while the trend decreased within downstream regions during this period.In 2016 and 2017,the total snail burden trend increased in both upstream and downstream provinces,however,upstream saw a larger increase.From 2009 to 2017,there were a total of 5990 hm^2 of newly developed snail areas in the seven study provinces and the majority were concentrated in regions below the TGD,accounting for 5610 hm^2(93.70%).Conclusions:There has been a decline in total snail counts from 2009 to 2017.Meanwhile,new snail breeding areas were formed mainly within provinces downstream the TGD due to spread of snails,indicated that the oncomelanid snail would be difficult to completely eliminate.We suggest that

关键词： Schistosomiasis Oncom elania hupensis yangtze river Three gorges dam China Operational research

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CHANGES OF PAN EVAPORATION IN THE UPPER REACH OF THE yangtze river

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Journal of Hydrodynamics 2011年第4期23卷 503-509页

作者： RONG Yan-shu WANG Wen JIANG Hai-yan College of Hydrology and Water Resources Hohai University Nanjing 210098 China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University Nanjing 210098 China

The upper reach of the yangtze river, 4 511 km long from west to east, contains a great amount of water resources of the yangtze river Basin. This article studies the characteristics of the pan evaporation, the related meteorological variables, and their effects on the pan evaporation, based on the data of the daily pan evaporation （1980-2008） and other meteorological variables （1961-2008）. The results show that the linear trend of the pan evaporation has remarkable regional features, i.e., the decrease trend in the southwest and the increase trend in the northeast of the investigated region, and the yangtze river is approximately the boundary of these trends. The meteorological variables have different effects on the pan evaporation depending on the fact that they are in the category the thermal variables or the dynamic variables. The thermal meteorological variables （i.e., air temperature, diurnal temperature range, and sunshine duration） have positive partial correlations with the pan evaporation, while the dynamic ones （air pressure, rainfall, and relateive humidity） have negative correlations with the pan evaporation. The correlation of the wind speed remains to be investigated.

关键词： linear time trend meteorological variable pan evaporation partial correlation yangtze river

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