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Decoupling effects of driving factors on sediment yield in the Chinese Loess Plateau

International Soil and Water Conservation Research 2023年第1期11卷 60-74页

作者： Xiaojing Tian Guangju Zhao Xingmin Mu Pengfei Zhang Peng Gao Wenyi Sun Xiaoyan Lu Peng Tian State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationNorthwest A&F University26 Xinong RoadYangling712100Shaanxi ProvinceChina Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources26 Xinong RoadYangling712100Shaanxi ProvinceChina Yangtze Ecology and Environment Co Ltd.Wuhan430000Hubei ProvinceChina Erdos Hydrological Survey Bureau of Inner Mongolia Autonomous Region Erdos017010Inner MongoliaChina College of Natural Resources and Environment Northwest A&F University3 Taicheng RoadYangling712100Shaanxi ProvinceChina

Investigations of runoff and sediment yield changes and their relationships with potential driving factors provide good insights for understanding the mechanisms of hydrological processes.This study attempted to present a comprehensive investigation on the spatiotemporal variations of sediment yield in the Loess Plateau using continuous observed data at 46 hydrological stations during 1961-2016,and its responses to changes of precipitation,land use/cover and vegetation cover were analyzed by using the Partial Least Squares-Structural Equation Model(PLS-SEM).The results indicated that sediment yield reduced pro-nouncedly during 1961-2016 in the Loess Plateau,and 77.9%of this variation was explained by the combined effects of precipitation,land-use change,vegetation dynamics and runoff reduction.Indirect effects of precipitation,land-use change,and vegetation cover on sediment yield were 0.242,-0.528 and-0.630(P<0.05),respectively,and direct effect of runoff on sediment yield was 0.833(P<0.05).According to the Pearson Correlation Coefficient,the strongest positive correlation existed between annual sediment yield and runoff(r=0.88,P<0.05),followed by vegetation cover(r=-0.47,P<0.05)and land-use change(i.***.forest land and grassland)suggesting their significant trapping effects on soil erosion.However,lower correlations were examined between sediment yield and precipitation indices(-0.14

关键词： Sediment yield Driving factors Correlation analysis PLS-SEM Loess Plateau

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Application of the InVEST model for assessing water yield and its response to precipitation and land use in the Weihe River Basin, China

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Journal of Arid Land 2022年第4期14卷 426-440页

作者： WU Changxue QIU Dexun GAO Peng MU Xingmin zhao guangju State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationNorthwest A&F UniversityYangling 712100China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationChinese Academy of Sciences and Ministry of Water ResourcesYangling 712100China University of Chinese Academy of Sciences Beijing 100000China

With realizing the importance of ecosystem services to society, the efforts to evaluate the ecosystem services have increased. As the largest tributary of the Yellow River, the Weihe River has been endowed with many ecological service functions. Among which, water yield can be a measure of local availability of water and an index for evaluating the conservation function of the region. This study aimed to explore the temporal and spatial variation of water yield and its influencing factors in the Weihe River Basin(WRB), and provide basis for formulating reasonable water resources utilization schemes. Based on the InVEST(integrated valuation of ecosystem services and tradeoffs) model, this study simulated the water yield in the WRB from 1985 to 2019, and discussed the impacts of climatic factors and land use change on water yield by spatial autocorrelation analysis and scenario analysis methods. The results showed that there was a slight increasing trend in water yield in the WRB over the study period with the increasing rate of 4.84 mm/10a and an average depth of 83.14 mm. The main water-producing areas were concentrated along the mainstream of the Weihe River and in the southern basin. Changes in water yield were comprehensively affected by climate and underlying surface factors. Precipitation was the main factor affecting water yield, which was consistent with water yield in time. And there existed significant spatial agglomeration between water yield and precipitation. Land use had little impact on the amount of water yield, but had an impact on its spatial distribution. Water yield was higher in areas with wide distribution of construction land and grassland. Water yield of different land use types were different. Unused land showed the largest water yield capacity, whereas grassland and farmland contributed most to the total water yield. The increasing water yield in the basin indicates an enhanced water supply service function of the ecosystem. These results are of great significance to the water resources m

关键词： water yield InVEST model Weihe River Basin Geoda model scenario analysis

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Changes in sediment discharge in a sediment-rich region of the Yellow River from 1955 to 2010: implications for further soil erosion control

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Journal of Arid Land 2014年第5期6卷 540-549页

作者： JuYing JIAO ZhiJie WANG Guangju Zhao WanZhong WANG XingMin MU Institute of Soil and Water Conservation Northwest A&F University Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources

The well-documented decrease in the discharge of sediment into the Yellow River has attracted considerable attention in recent years. The present study analyzed the spatial and temporal variation of sediment yield based on data from 46 hydrological stations in the sediment-rich region of the Yellow River from 1955 to 2010. The results showed that since 1970 sediment yield in the region has clearly decreased at different rates in the 45 sub-areas controlled by hydrological stations. The decrease in sediment yield was closely related to the intensity and extent of soil erosion control measures and rainstorms that occurred in different periods and sub-areas. The average sediment delivery modulus（SDM） in the study area decreased from 7,767.4 t/（km^2·a） in 1951–1969 to 980.5 t/（km^2·a） in 2000–2010. Our study suggested that 65.5% of the study area with the SDM below 1,000 t/（km^2·a） is still necessary to control soil deterioration caused by erosion, and soil erosion control measures should be further strengthened in the areas with the SDM above 1,000 t/（km^2·a）.

关键词： sediment delivery modulus（SDM） Yellow River hydrological station（s）-controlled sub-area soil and water conservation

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Runoff characteristics and its sensitivity to climate factors in the Weihe River Basin from 2006 to 2018

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Journal of Arid Land 2022年第12期14卷 1344-1360页

作者： WU Changxue Xu Ruirui QIU Dexun DING Yingying GAO Peng MU Xingmin zhao guangju State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationNorthwest A&F UniversityYangling 712100China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationChinese Academy of Sciences and Ministry of Water ResourcesYangling 712100China University of Chinese Academy of Sciences Beijing 100000China

Exploring the current runoff characteristics after the large-scale implementation of the Grain for Green(GFG)project and investigating its sensitivities to potential drivers are crucial for water resource prediction and management.Based on the measured runoff data of 62 hydrological stations in the Weihe River Basin(WRB)from 2006 to 2018,we analyzed the temporal and spatial runoff characteristics in this study.Correlation analysis was used to investigate the relationships between different runoff indicators and climate-related factors.Additionally,an improved Budyko framework was applied to assess the sensitivities of annual runoff to precipitation,potential evaporation,and other factors.The results showed that the daily runoff flow duration curves(FDCs)of all selected hydrological stations fall in three narrow ranges,with the corresponding mean annual runoff spanning approximately 1.50 orders of magnitude,indicating that the runoff of different hydrological stations in the WRB varied greatly.The trend analysis of runoff under different exceedance frequencies showed that the runoff from the south bank of the Weihe River was more affluent and stable than that from the north bank.The runoff was unevenly distributed throughout the year,mainly in the flood season,accounting for more than 50.00%of the annual runoff.However,the trend of annual runoff change was not obvious in most areas.Correlation analysis showed that rare-frequency runoff events were more susceptible to climate factors.In this study,daily runoff under 10%-20%exceeding frequencies,consecutive maximum daily runoff,and low-runoff variability rate had strong correlations with precipitation,aridity index,and average runoff depth on rainy days.In comparison,daily runoff under 50%-99%exceeding frequencies,consecutive minimum daily runoff,and high-runoff variability rate had weak correlations with all selected impact factors.The sensitivity analysis results suggested that the sensitivity of annual runoff to precipitation was always higher than that to potent

关键词： daily runoff climate-related factors precipitation potential evaporation correlation analysis sensitivity analysis Weihe River Basin

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Spatial-temporal Analysis and Prediction of Precipitation Extremes: A Case Study in the Weihe River Basin, China

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Chinese Geographical Science 2022年第2期32卷 358-372页

作者： QIU Dexun WU Changxue MU Xingmin zhao guangju GAO Peng State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationChinese Academy of Sciences and Ministry of Water ResourcesYangling 712100China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationNorthwest Agriculture and Forestry UniversityYangling 712100China

Extreme precipitation events bring considerable risks to the natural ecosystem and human life.Investigating the spatial-temporal characteristics of extreme precipitation and predicting it quantitatively are critical for the flood prevention and water resources planning and management.In this study,daily precipitation data(1957–2019)were collected from 24 meteorological stations in the Weihe River Basin(WRB),Northwest China and its surrounding areas.We first analyzed the spatial-temporal change of precipitation extremes in the WRB based on space-time cube(STC),and then predicted precipitation extremes using long short-term memory(LSTM)network,auto-regressive integrated moving average(ARIMA),and hybrid ensemble empirical mode decomposition(EEMD)-LSTM-ARIMA models.The precipitation extremes increased as the spatial variation from northwest to southeast of the WRB.There were two clusters for each extreme precipitation index,which were distributed in the northwestern and southeastern or northern and southern of the WRB.The precipitation extremes in the WRB present a strong clustering pattern.Spatially,the pattern of only high-high cluster and only low-low cluster were primarily located in lower reaches and upper reaches of the WRB,respectively.Hot spots(25.00%–50.00%)were more than cold spots(4.17%–25.00%)in the WRB.Cold spots were mainly concentrated in the northwestern part,while hot spots were mostly located in the eastern and southern parts.For different extreme precipitation indices,the performances of the different models were different.The accuracy ranking was EEMD-LSTM-ARIMA>LSTM>ARIMA in predicting simple daily intensity index(SDII)and consecutive wet days(CWD),while the accuracy ranking was LSTM>EEMD-LSTM-ARIMA>ARIMA in predicting very wet days(R95 P).The hybrid EEMD-LSTM-ARIMA model proposed was generally superior to single models in the prediction of precipitation extremes.

关键词： precipitation extremes space-time cube(STC) ensemble empirical mode decomposition(EEMD) long short-term memory(LSTM) auto-regressive integrated moving average(ARIMA) Weihe River Basin,China

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Emergency treatment of 16 patients with necrotizing fasciitis caused by Vibrio vulnificus infection complicated with septic shock

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Chinese Medical Journal 2014年第10期127卷 1984-1986页

作者： Hong Guangliang Wu Bin Lu Caijiao Li Mengfang zhao guangju Lu Zhongqiu Department of Emergency Medicine First Affiliated Hospital of Wenzhou Medical University Wenzhou Zhejiang 325000 China Department of Burns Surgery First AffiliatedHospital of Wenzhou Medical University Wenzhou Zhejiang 325000 China

Necrotizing fasciitis （NF） caused by vibrio vulnificus （VV） is a rare but fatal clinical emergency characterized by hemorrhagic bullous skin lesions,septic shock and multiple organ dysfunction syndrome （MODS）,commonly occurring in patients with chronic liver disease.1,2 In general,mortality of these patients is higher than 60%,which could approach 100% when complicated with septic shock.Therefore,early diagnosis and effectively surgical intervention in emergency room are the mainstays for better outcomes of these patients.However,many emergency physicians lack experiences in diagnosing and managing vibrio NF.Furthermore,due to the preexisting severe medical complications including hypotension,lactic acidosis,coagulation disorders and thrombocytopenia,the optimal therapeutic strategies for these critical patients should obviously be evaluated on a patient-to-patient basis,which remains largely undefined.

关键词： vibrio vulnificus necrotizing fasciitis septic shock therapeutics prognosis

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“立体闭环”急救体系在亚运会温州赛事保障中的实践

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中华急诊医学杂志 2023年第12期32卷 1641-1644页

作者：赵光举暨玲李心群卢中秋温州医科大学附属第一医院急诊科温州325000 温州医科大学附属第一医院医务处温州325000

背景区域急救体系需要能够在灾难和突发公共卫生事件中保持正常运行,确保急危重症患者救治的及时性,同时也担负着各类社会活动保障的重任。本文探讨"立体闭环"急救体系在亚运会温州赛事保障中的实践。方法温州医科大学附属第一医院在分... 详细信息

背景区域急救体系需要能够在灾难和突发公共卫生事件中保持正常运行,确保急危重症患者救治的及时性,同时也担负着各类社会活动保障的重任。本文探讨"立体闭环"急救体系在亚运会温州赛事保障中的实践。方法温州医科大学附属第一医院在分析和整合现有医疗资源基础上,研判温州赛区赛事特点,模拟城市道路和自然水域等环境下突发事件和医疗保障场景,针对医疗保障体系的薄弱环节,进行了2年的持续演练和优化。结果成功建立"立体闭环"急救体系,并圆满完成了保障工作。"立体闭环"急救体系具有分权组织结构和专业医疗组相结合的立体化管理模式,同时形成能够满足赛事需求的陆、海、空"三位一体"应急救援体系。通过人力与信息结合的方式,实现场馆医疗应急事件即时感知、即时评估、120即时转运、院内医疗团队即时到位的"四即时"。在急诊亚运保障组的组织下,通过院内诊疗的闭环,实现了医疗保障对象"全流程无感就医"。结论"立体闭环"急救体系在亚运会温州赛事保障取得了满意的效果,也为未来城市应急救援积累了经验。

关键词：应急体系救援体系亚运会医疗保障

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十字花科蔬菜摄入量与肾细胞癌罹患风险的Meta分析

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山东大学学报（医学版） 2014年第7期52卷 82-89页

作者：赵龙关广聚山东大学第二医院肾内科山东济南250033

目的应用Meta分析方法定量评价十字花科蔬菜（CV）摄入量与肾细胞癌（RCC）罹患风险之间的关系。方法制定检索策略和文献的纳入排除标准,系统检索ProQuest、Web of Science、EMBASE和PUBMED数据库1966年1月至2013年12月间的文献。使用St... 详细信息

目的应用Meta分析方法定量评价十字花科蔬菜（CV）摄入量与肾细胞癌（RCC）罹患风险之间的关系。方法制定检索策略和文献的纳入排除标准,系统检索ProQuest、Web of Science、EMBASE和PUBMED数据库1966年1月至2013年12月间的文献。使用Stata 11.0软件应用随机效应模型和固定效应模型估计合并相对风险RR和相应的95%置信区间（CI）。通过Meta回归探讨异质性的潜在来源。同时应用亚组分析、累积Meta分析和敏感性分析。结果共12篇文献（6篇队列研究和6篇病例对照研究）符合纳入标准,1 228 518例研究对象（包括5 773例RCC病例）。文献汇总结果显示,CV摄入量与RCC罹患风险间的关联性差异有统计学意义[RR=0.81,95%CI（0.72-0.91）]。亚组分析结果显示,美国人群中,CV摄入量与低RCC罹患风险明显相关[RR=0.77,95%CI（0.70-0.86）];欧洲人群中,CV摄入量与RCC罹患风险无明显的相关性[RR=0.87,95%CI（0.71-1.07）]。结论 Meta分析的结果表明,美国人群摄入较高剂量的CV对RCC具有保护作用。

关键词：十字花科蔬菜肾细胞癌肿瘤风险 Meta分析

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Inferior vena cava thrombosis in two adult patients with veno-arterial extracorporeal membrane oxygenation

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World Journal of Emergency Medicine 2023年第5期14卷 408-410页

作者： Xiao Chen Anyu Qian Mao Zhang guangju Zhou Department of Emergency Medicine the Second Affi liated Hospital of Zhejiang University School of MedicineHangzhou 310009China

Veno-arterial extracorporeal membrane oxygenation(VA-ECMO) is indicated in patients with severe cardiogenic shock.During extracorporeal membrane oxygenation(ECMO) use,systemic anticoagulation is generally used to ensure the normal functioning of ECMO.Hemorrhage and thrombosis are two important complications of ECMO.However,despite adequate anticoagulation,some patients still experience thrombosis,such as inferior vena cava thrombosis (IVCT),after the removal of ECMO.^([1,2])A metaanalysis showed that the incidence of venous thrombosis during ECMO treatment is approximately 10%,^([3])but IVCT is rarely reported.We report two cases of IVCT after the removal of VA-ECMO cannulas.

关键词： thrombosis patients arterial

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渭河流域极端降雨变化趋势及其对水沙情势的影响

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水土保持研究 2022年第6期29卷 65-72页

作者：邱德勋穆兴民赵广举高鹏中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室陕西杨凌712100 中国科学院大学北京100049 西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室陕西杨凌712100

为探究渭河流域极端降雨变化趋势及其对水沙情势的影响,采用非参数趋势检验、突变检验和连续小波变换诊断了渭河流域1960—2019年的极端降雨指数及径流输沙序列的变异特征,通过双累积曲线法和相关分析法定量评估了流域极端降雨对水沙变... 详细信息

为探究渭河流域极端降雨变化趋势及其对水沙情势的影响,采用非参数趋势检验、突变检验和连续小波变换诊断了渭河流域1960—2019年的极端降雨指数及径流输沙序列的变异特征,通过双累积曲线法和相关分析法定量评估了流域极端降雨对水沙变化的影响。结果表明:各极端降雨指数呈阶段性波动变化,总体上PRCPTOT,RX5day和RX1day呈不显著下降趋势,R95pTOT,SDII和FSPTOT呈不显著上升趋势。各极端降雨指数均存在以4~6 a,11~12 a,28~29 a为周期的变化特征。径流与输沙量均呈显著减少趋势,分别在1993年、1999年发生突变,其中径流存在5 a和12 a的周期。各极端降雨指数均与径流、输沙量正相关,相比之下,输沙量与各极端降雨指数之间的相关系数偏低。极端降雨变化对径流与输沙量的减少具有重要影响。其中,PRCPTOT对径流减少的影响最大(29.65%),其次是RX5day(25.68%)和FSPTOT(25.95%)。PRCPTOT对输沙量减少的影响也是最大的(10.02%),其次是RX5day(7.12%)。综上,渭河流域水沙情势的变化受极端降雨的显著影响。

关键词：渭河流域水沙极端降雨

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