检索结果-南通市图书馆

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

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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 ar

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

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

在线全文

学校读者我要写书评

暂无评论

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 *** the spatial-temporal characteristics of extreme precipitation and predicting it quantitatively are critical for the flood prevention and water resources planning and *** this study,daily precipitation data(1957–2019)were collected from 24 meteorological stations in the Weihe River Basin(WRB),Northwest China and its surrounding *** 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 *** precipitation extremes increased as the spatial variation from northwest to southeast of the *** were two clusters for each extreme precipitation index,which were distributed in the northwestern and southeastern or northern and southern of the *** precipitation extremes in the WRB present a strong clustering ***,the pattern of only high-high cluster and only low-low cluster were primarily located in lower reaches and upper reaches of the WRB,*** spots(25.00%–50.00%)were more than cold spots(4.17%–25.00%)in the *** spots were mainly concentrated in the northwestern part,while hot spots were mostly located in the eastern and southern *** different extreme precipitation indices,the performances of the different models were *** 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

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

在线全文

学校读者我要写书评

暂无评论

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

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

在线全文

学校读者我要写书评

暂无评论

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 *** 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 *** analysis was used to investigate the relationships between different runoff indicators and climate-related ***,an improved Budyko framework was applied to assess the sensitivities of annual runoff to precipitation,potential evaporation,and other *** 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 *** 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 *** runoff was unevenly distributed throughout the year,mainly in the flood season,accounting for more than 50.00%of the annual ***,the trend of annual runoff change was not obvious in most *** analysis showed that rare-frequency runoff events were more susceptible to climate *** 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 *** comparison,daily runoff under 50%-99%exceeding frequencies,consecutive minimum daily runoff,and high-runoff variability rate had weak correlations with all selected impact *** sensitivity analysis results suggested that the sensitivity of annual runoff to pre

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

黄棕壤典型草地不同根系结构土壤团聚体稳定性季节变化特征

在线全文

学校读者我要写书评

暂无评论

水土保持研究 2025年第1期32卷 66-72页

作者：杨程高歌雷少华耿韧周岩金秋赵广举卢慧中孙国昌流域水土保持江西省重点实验室南京水利科学研究院水文水资源与水利工程科学国家重点实验室江苏省水文水资源勘测局连云港市连云区农林水利局

[目的]探究黄棕壤草地不同根系结构下土壤团聚体稳定性随季节的变化特征及其影响因素，为区域水土流失治理提供理论和实践依据。[方法]借助配对T检验分析须根系（狗尾草）、直根系（青蒿）和裸地对照3类样地间土壤团聚体稳定性季节变化... 详细信息

[目的]探究黄棕壤草地不同根系结构下土壤团聚体稳定性随季节的变化特征及其影响因素，为区域水土流失治理提供理论和实践依据。[方法]借助配对T检验分析须根系（狗尾草）、直根系（青蒿）和裸地对照3类样地间土壤团聚体稳定性季节变化差异，借助Pearson相关分析确定影响土壤团聚体稳定性季节变化的因素，并使用回归分析建立土壤团聚体稳定性拟合方程。[结果]狗尾草样地和青蒿样地土壤团聚体稳定性随季节变化出现明显的波动，均与裸地样地差异性显著（p0.05）。狗尾草样地和青蒿样地土壤团聚体稳定性受根系密度影响显著（p<0.05）,此外，青蒿样地土壤团聚体稳定性与土壤紧实度存在显著相关性。非线性回归分析表明，土壤团聚体稳定性可以用根系密度和土壤紧实度很好地拟合（R2=0.730,NSE=0.730）。[结论]两种草地的根系结构均可以提升黄棕壤的土壤团聚体稳定性，并显著影响土壤团聚体稳定性的季节变化特征。但不同根系结构对土壤团聚体稳定性的影响无明显差异。

关键词：土壤团聚体稳定性季节变化植物根系根系类型

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

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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 *** 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 *** 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(*** land and grassland)suggesting their significant trapping effects on soil ***,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

Phase transition of DNA compaction in confined space: Effects of macromolecular crowding are dominant

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第1期29卷 489-494页

作者： Erkun Chen Yangtao Fan guangju zhao Zongliang Mao Haiping Zhou Yanhui Liu College of Physics Guizhou UniversityGuiyang 550025China Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices Pen-Tung Sah Institute of Micro-Nano Science and TechnologyXiamen UniversityXiamen 361005China Department of Computer Science and Engineering Shaoxing UniversityShaoxing 312000China

With a view of detecting the effects of macromolecular crowding on the phase transition of DNA compaction confined in spherical space,Monte Carlo simulations of DNA compaction in free space,in confined spherical space without crowders and in confined spherical space with crowders were performed *** simulation results indicate that macromolecular crowding effects on DNA compaction are dominant over the roles of multivalent *** addition,effects of temperature on the phase transition of DNA compaction have been identified in confined spherical space with different *** confined spherical space without crowders,the temperature corresponding to phase transition depends on the radius of the confined spherical space *** contrast,with the addition of crowders to the confined spherical space,effects of temperature on the phase transition of DNA compaction become insignificant,whereas the phase transition at different temperatures strongly depends on the size of crowder,and the critical volume fraction of crowders pertains to the diameter of crowder linearly.

关键词： macromolecular crowding Monte Carlo simulation DNA compaction phase transition

A review of the ecohydrology discipline: Progress, challenges, and future directions in China

在线全文

学校读者我要写书评

暂无评论

Journal of Geographical Sciences 2021年第8期31卷 1085-1101页

作者： XIA Jun ZHANG Yongyong MU Xingmin ZUO Qiting ZHOU Yujian zhao guangju State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan 430072China Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China Institute of Soil and Water Conservation CAS and Ministry of Water ResourcesYangling 712100ShaanxiChina School of Water Conservancy&Environment Zhengzhou UniversityZhengzhou 450001China Institute of Soil and Water Conservation Northwest Agriculture&Forestry UniversityYangling 712100ShaanxiChina

In recent decades, the ecohydrology discipline was developed to provide theoretical and technical foundations for the protection and restoration of complex ecological systems(e.g., mountains, rivers, forests, farmlands, and lakes), and to further ecological civilization construction and green development in China. In this study, the progress and challenges of the ecohydrology discipline are elaborated, and the future development directions are proposed according to international scientific frontiers and national ecological civilization construction demands. Overall, the main discipline directions are to develop new ecohydrological monitoring methods, to comprehensively understand ecohydrological mechanisms and their basic theories, to promote integration of multi-scale and multi-variable models by considering both terrestrial and aquatic ecosystems, and to encourage multidisciplinary integration, particularly with the social sciences. Furthermore, the future research interests in China include: combining multi-source information, constructing comprehensive monitoring systems, studying spatiotemporal patterns of key ecohydrological variables and their variation characteristics, developing integrated models of ecological, hydrological, and economic processes, estimating their uncertainty;and conducting interdisciplinary studies that include the natural and social sciences. The application prospects in China are further explored for a variety of ecosystems, including forests, grasslands, rivers, lakes, wetlands, farmlands, and cities. This study will provide a reference to support the development of the ecohydrology discipline in China, and will provide a solid theoretical and technical foundation for the implementation of national ecological civilization construction.

关键词： ecohydrology discipline theory and method comprehensive observation mathematical modelling scale issue

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

在线全文

学校读者我要写书评

暂无评论

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 ***,early diagnosis and effectively surgical intervention in emergency room are the mainstays for better outcomes of these ***,many emergency physicians lack experiences in diagnosing and managing vibrio ***,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