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Springs Emerging along the Elevation Gradient Indicate Intensive Groundwater-Surface Water Exchange in an Alpine Headwater Catchment, Northwestern China

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Journal of Earth Science 2023年第1期34卷 181-193页

作者： Yalu Hu ziyong sun Rui Ma School of Environmental Studies China University of GeosciencesWuhan430078China Laboratory of Basin Hydrology and Wetland Eco-Restoration China University of GeosciencesWuhan430078China State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution Ministry of Ecology and EnvironmentWuhan430078China Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science China University of GeosciencesWuhan430078China

Groundwater plays an important role in sustaining the streamflow in cold alpine area, but is poorly understood due to a lack of direct access. About 98 groups of springs are observed at the upper reaches of Heihe River Basin, which provide an opportunity to explore the main aquifers. Springs are clustered in three groups according to locations:(1) springs on the moraine and talus deposits;(2) springs at the end of alluvial plain in lower topography;(3) springs along the river bank. The hydrometric, geochemical and isotopic data of springs in a representative catchment were integrated and used to elucidate the groundwater flow paths. Results indicate the Quaternary porous aquifers in the alpine catchment have a profound influence on the regional groundwater flow paths and the groundwater and surface water(GW-SW) interactions. The aquifer consisting of alluvial-pluvial deposits has a great capacity of groundwater storage and plays a vital role in regulating discharge by attenuating the seasonal variation and maintaining the main stream in cold seasons. This is different from the fast recharge and discharge mode of the moraine and talus deposits. Our work highlights the importance of loose deposits in controlling the GW-SW interactions in the cold alpine area.

关键词： springs alpine catchments groundwater groundwater-surface water interactions alluvial plain

Assessing the Connectivity of a Regional Fractured Aquifer Based on a Hydraulic Conductivity Field Reversed by Multi-Well Pumping Tests and Numerical Groundwater Flow Modeling

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Journal of Earth Science 2023年第6期34卷 1926-1939页

作者： Jingjing Lin Rui Ma ziyong sun Liansong Tang School of Environmental Studies State Key Laboratory of Biogeology and Environmental GeologyChina University of GeosciencesWuhan 430078China Yangtze River Basin Ecological Environment Monitoring and Scientific Research Center Yangtze River Basin Ecological Environment Supervision and Administration BureauMinistry of Ecological EnvironmentWuhan 430010China

Aquifer connectivity could greatly affect groundwater flow and further control the contaminant transport in fractured ***,assessing connectivity of fractured aquifer at regional scales is still a challenge because such connectivity is difficult to be measured *** study proposes a framework for assessing connectivity of a fractured aquifer,with Qitaihe area,Heilongjiang Province,northeastern China as an illustrating study *** 3-D finite difference numerical models were established to interpret the results of three multi-well pumping tests and inversely estimate the distribution of hydraulic conductivity(K)in the fractured aquifer.A static connectivity metric of the minimum hydraulic resistance(MHR)was calculated,based on the optimized K-field,to evaluate the hydraulic connectivity in the aquifer,and the corresponding least resistance paths(LRPs)were *** results indicate a better horizontal connectivity in the fractured aquifer in the northeastern and middle parts than in the southwestern part of the study *** identified LRP indicated that the preferential flow channels at regional scales were controlled mainly by aquifer connectivity instead of local high-K *** results of this study can provide a method for aquifer connectivity estimation at regional scales.

关键词： numerical modeling aquifer connectivity groundwater flow hydraulic conductivity minimum hydraulic resistance least resistance paths

Limitation of the Application of Heat Tracer in Investigating Groundwater and River Interactions under Dynamic Flow Conditions

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Journal of Earth Science 2022年

作者： Mengyan Ge Rui Ma ziyong sun School of Environmental Studies， China University of Geosciences State Key Laboratory of Biogeology and Environmental Geology， China University of Geosciences

The groundwater (GW) in the floodplain riparian area frequently interacts intensely with surface water (SW). Heat as a tracer is one of the hot research fields in investigating GW-SW interactions， and analytical approaches have been proposed for the calculation of exchange flow velocity. However， few studies have considered the effects of very dynamic flow conditions and monitoring instrumentation on the calculation with field measured data. Herein， taking the middle reaches of the Heihe River as the study area， different types of monitoring wells were constructed under the riverbed and near the river， and multiple methods (Darcy’s law， heat tracing， and isotopic mixing methods) were employed to trace the exchanges between the river and groundwater. The results indicate that different methods demonstrate diverse information with obvious unevenly distributed flux along the vertical direction. And the combination of multiple methods has an important role in studying the interaction between GW and SW. Fully screened wells produce intraborehole flow and disturb the heat transport， which is relevant to flow velocity， and further affects the temperature distribution， impacting the temperature-based flow velocity calculation. Dynamic flow conditions aggravate riverbed sediment disturbances， e.g.， scour and deposition， and additionally affect the interaction and monitoring data.

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Spatial and Temporal Dynamics of Lakes in Nam Co Basin, 1991–2011

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Journal of Earth Science 2016年第1期27卷 130-138页

作者： Xu Wang Aiguo Zhou ziyong sun School of Public Administration China University of Geosciences Laboratory of Geographical Environment and National Park China University of Geosciences School of Environmental Studies China University of Geosciences State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Laboratory of Basin Hydrology and Wetland Eco-Restoration China University of Geosciences

Lakes in Tibet Plateau with little effects of human activities serve as important indicators of climate change. This study analysed remote sensing data and long term climate variables to examine the hydrological response of lakes in Nam Co Basin. The area changes of lakes were extracted by Landsat TM/ETM＋ and analysed by SRTM 3 DEM. And the ICESat elevation data between 2003 and 2009 were used to observe the lake level of the Nam Co Lake. The results show that the number of new formed glacier lakes increased by 36% and the area of glacier lakes increased by 36.7%（0.97 km^2） from 1991 to 2011. At the same time, the surface area of the Nam Co Lake expanded by 3.71%（72.64 km^2） of the original size in 1991, with a tendency value of 3.63 km^2 per year. The lake level of the Nam Co Lake shows an increase tendency of 0.24 m per year during 2003-2009. These variations appear to be related to an increase in mean annual temperature of 0.06 oC per year, and an increase in annual precipitation of 2.1 mm per year in summer in the last two decades. The increased number of lakes and increased area of glacial lakes reached a peak at an altitude of 5 500-5 600 m a.s.l.. The number of new formed glacier lakes and the area of glacier lakes tend to higher altitudes. Climate change has an important impact on the variation of the glacier lakes and the Nam Co Lake.

关键词： glacier lake Nam Co Basin remote sensing.

Hydrogeochemical and Isotopic Evidence for Flow Paths of Karst Waters Collected in the Heshang Cave,Central China

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Journal of Earth Science 2015年第1期26卷 149-156页

作者： Xiang Long ziyong sun Aiguo Zhou Deliang Liu School of Environmental Studies China University of Geosciences

Understanding of hydrological processes in caves is important to help us interpret paleoclimate records from speleothems. In this study, we integrated hydrogeological and hydrogeochemical properties to characterize the hydraulic behavior of karst waters in the Heshang Cave, Central China. Using geological and topographical analyses, we identified regional watershed boundaries and hydrogeological connections that were controlled by anticlinal geometry and faults. Water samples were collected from the Heshang Cave and potential recharge sites. Geochemical data of c（Sr^2＋）/c（Ca^2＋） and c（Mg^2＋）/c（Ca^2＋） ratios suggest that the drainage system in Heshang Cave consists of two flow paths. For vadose waters, including drip water and rimstone pool water, c（Sr^2＋）/c（Ca^2＋） ratio ranges from 0.000 6 to 0.001 1, and c（Mg^2＋）/c（Ca^2＋） ratio ranges from 0.97 to 1.1, indicating that recharge was mainly from rainfall infiltration through the overlying Cambrian dolomite stratum. In contrast, slope current and underground river waters have higher c（Sr^2＋）/c（Ca^2＋） ratios （values from 0.002 2 to 0.002 8）, and lower c（Mg2＋）/c（Ca^2＋） ratios （values from 0.50 to 0.64）. These waters show homogeneous isotopic composition （δ^18O： -7.15‰- -6.95‰; δD： -52.73‰- -51.31‰）, implying recharge of allogeneic water from the Xiaocr River via karst conduits that pass through Ordovician limestone and Cambrian dolomite stratum.

关键词： karst water hydrogeochemistry stable isotope flow path Heshang Cave.

Theoretical Framework for a Polymorphic Network Environment

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Engineering 2024年第8期39卷 222-234页

作者： Jiangxing Wu Junfei Li Penghao sun Yuxiang Hu ziyong Li PLA Strategic Support Force Information Engineering University Zhengzhou 450000China

The question of whether an ideal network exists with global scalability in its full life cycle has always been a first-principles problem in the research of network systems and *** far,it has not been possible to scientifically practice the design criteria of an ideal network in a unimorphic network system,making it difficult to adapt to known services with clear application scenarios while supporting the ever-growing future services with unexpected ***,we theoretically prove that no unimorphic network system can simultaneously meet the scalability requirement in a full cycle in three dimensions—the service-level agreement(S),multiplexity(M),and variousness(V)—which we name as the“impossible SMV triangle”*** is only by transforming the current network development paradigm that the contradiction between global scalability and a unified network infrastructure can be resolved from the perspectives of thinking,methodology,and practice *** this paper,we propose a theoretical framework called the polymorphic network environment(PNE),the first principle of which is to separate or decouple application network systems from the infrastructure environment and,under the given resource conditions,use core technologies such as the elementization of network baselines,the dynamic aggregation of resources,and collaborative software and hardware arrangements to generate the capability of the“network of networks.”This makes it possible to construct an ideal network system that is designed for change and capable of symbiosis and coexistence with the generative network morpha in the spatiotemporal *** environment test for principle verification shows that the generated representative application network modalities can not only coexist without mutual influence but also independently match well-defined multimedia services or custom services under the constraints of technical and economic indicators.

关键词： Polymorphic network environment Impossible triangle Network development paradigm Future network

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脓毒症实验诊断现状与问题

中华检验医学杂志 2023年第10期46卷 983-986页

作者：汪峰唐宁田磊孙自镛华中科技大学同济医学院附属同济医院检验科武汉430030

脓毒症一直是临床和实验室研究的热点和难点。早期病原学诊断、宿主免疫状态评估、凝血功能异常,作为脓毒症实验诊断的三个关键问题,近年来不断取得突破,但也存在诸多挑战。对脓毒症的这些关键问题进行剖析,可以提高脓毒症实验诊断水平... 详细信息

脓毒症一直是临床和实验室研究的热点和难点。早期病原学诊断、宿主免疫状态评估、凝血功能异常,作为脓毒症实验诊断的三个关键问题,近年来不断取得突破,但也存在诸多挑战。对脓毒症的这些关键问题进行剖析,可以提高脓毒症实验诊断水平,为提高患者存活率提供帮助。

关键词：脓毒症实验诊断病原学免疫状态凝血异常

高寒山区河道径流的形成与水文调节机制研究进展

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地球科学 2022年第11期47卷 4196-4209页

作者：常启昕孙自永潘钊李兆峰地质灾害防治与地质环境保护国家重点实验室四川成都610059 成都理工大学环境与土木工程学院四川成都610059 中国地质大学环境学院湖北武汉430078

高寒山区河道径流的形成与水文调节机制是认识流域水资源形成与转化过程,以及预测气候变化下流域水文过程响应规律的基础.通过分析国内外相关文献,从高寒山区河道径流的水分来源及其气候变化下的影响机制、高寒山区不同类型下垫面对河... 详细信息

高寒山区河道径流的形成与水文调节机制是认识流域水资源形成与转化过程,以及预测气候变化下流域水文过程响应规律的基础.通过分析国内外相关文献,从高寒山区河道径流的水分来源及其气候变化下的影响机制、高寒山区不同类型下垫面对河道径流的调节机制、高寒山区不同类型地下水对河道径流的调节机制三个方面综述其研究进展,总结问题与不足,发现气候变化是影响高寒山区河道径流形成过程的主导因素,探究水文输入、下垫面、地下水等次要影响因素与气候变化之间的响应规律是揭示高寒山区河道径流水文调节机制的关键科学问题,并提出未来研究的总体趋势和改进建议,为高寒山区河道径流形成机制及其对气候变化的响应规律研究提供参考依据.

关键词：高寒山区河道径流径流形成水文调节气候变化水文地质

Systemically comparing host immunity between survived and deceased COVID-19 patients

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Cellular & Molecular Immunology 2020年第8期17卷 875-877页

作者： Feng Wang Hongyan Hou Yin Yao Shiji Wu Min Huang Xiao Ran Hongmin Zhou Zheng Liu ziyong sun Department of Laboratory Medicine Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Department of Otolaryngology-Head and Neck Surgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Department of Emergency Medicine Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Department of Cardiothoracic and Vascular Surgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina

Novel severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has caused the disastrous pandemic of Coronavirus Disease-2019(COVID-19).1,2,3 Although the epidemiological,clinical,and immunological characteristics of COVID-19 have been reported,4,5,6 the kinetics of immune responses and their association with clinical outcomes remain poorly ***,we summarize the characteristics of cellular immune responses in a total of 157 COVID-19 patients enrolled in Tongji Hospital between February and March 2020 and compare the properties between 95 survived and 62 deceased patients with different onset *** demographic and clinical characteristics of these patients are shown in Supplementary Table *** significant difference in age,gender,clinical symptoms,and imaging features was recorded between survived and deceased patients.

关键词： patients immunity clinical