25,033 results match your criteria Basin Research[Journal]


Mobile genetic elements are the Major driver of High antibiotic resistance genes abundance in the Upper reaches of huaihe River Basin.

J Hazard Mater 2020 Jun 22;401:123271. Epub 2020 Jun 22.

MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China. Electronic address:

Rivers are considered a vital reservoir of antibiotic resistance genes (ARGs) and are critical to disseminate ARGs. The present study delved into the ARGs pollution of the sediments in the upper reaches of Huaihe river, one of the seven longest rivers in China, by high-throughput quantitative PCR. Subsequently, the relationship between ARGs and the bacterial community/mobile genetic elements (MGEs) was determined. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123271DOI Listing

Role of MnO in controlling iron and arsenic mobilization from illuminated flooded arsenic-enriched soils.

J Hazard Mater 2020 Jul 1;401:123362. Epub 2020 Jul 1.

Zhejiang Provincial Key Laboratory of Watershed Science & Health, School of Public Health and Management, Wenzhou Medical University, Wenzhou, 325035, People's Republic of China; Department of Land, Air and Water Resources, University of California, Davis, Davis, CA, 95616, United States.

This study examined the role of intermittent illumination/dark conditions coupled with MnO-ammendments to regulate the mobility of As and Fe in flooded arsenic-enriched soils. Addition of MnO particles with intermittent illumination led to a pronounced increase in the reductive-dissolution of Fe(III) and As(V) from flooded soils compared to a corresponding dark treatments. A higher MnO dosage (0. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123362DOI Listing

Occurrence of antibiotic resistance genes and microbial source tracking markers in the water of a karst spring in Germany.

Authors:
C Stange A Tiehm

Sci Total Environ 2020 Jun 25;742:140529. Epub 2020 Jun 25.

DVGW-Technologiezentrum Wasser (TZW), Karlsruher Straße 84, D-76139 Karlsruhe, Germany. Electronic address:

The emergence of antimicrobial resistances causes serious public health concerns worldwide. In recent years, the aquatic ecosystem has been recognized as a reservoir for antibiotic-resistant bacteria and antibiotic resistance genes (ARGs). The prevalence of 11 ARGs, active against six antibiotic classes (β-lactams, aminoglycosides, tetracycline, macrolides, trimethoprim, and sulfonamides), was evaluated at a karst spring (Gallusquelle) in Germany, using molecular biological methods. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.140529DOI Listing

Selection of optimum biological treatment for coking wastewater using analytic hierarchy process.

Sci Total Environ 2020 Jun 20;742:140400. Epub 2020 Jun 20.

School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China. Electronic address:

The design of biological treatment process for the coking wastewater (CW) is complicated since wastewater treatment demand is gradually increasing lacking the systematic strategy in efficiency evaluation and advisable selection. Therefore, this study develops a holistic approach by means of the analytic hierarchy process (AHP) that uses numerical representation to rank the preferences of each participating alternatives for evaluation of the advanced biological technologies in CW treatment. Based on survey results, six types reactor combinations were selected as the alternatives, which were further classified as two group according to COD load. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.140400DOI Listing

Watershed-scale climate influences productivity of Chinook salmon populations across southcentral Alaska.

Glob Chang Biol 2020 Jul 6. Epub 2020 Jul 6.

Alaska Department of Fish and Game, Division of Sport Fish, Palmer, AK, USA.

The ecosystems supporting Pacific salmon (Oncorhynchus spp.) are changing rapidly as a result of climate change and habitat alteration. Understanding how-and how consistently-salmon populations respond to changes at regional and watershed scales has major implications for fisheries management and habitat conservation. Read More

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http://dx.doi.org/10.1111/gcb.15155DOI Listing

Opioid Use Disorder Treatment and Potential Interactions With Novel COVID-19 Medications: A Clinical Perspective.

Prim Care Companion CNS Disord 2020 Jul 2;22(4). Epub 2020 Jul 2.

Department of Psychiatry, Penn State College of Medicine, Harrisburg, Pennsylvania, USA.

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http://dx.doi.org/10.4088/PCC.20com02703DOI Listing

Detection of the Genus and the Species by LAMP with a QProbe.

Plant Dis 2020 Jul 6:PDIS12192523RE. Epub 2020 Jul 6.

River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu-city, Gifu, 501-1193, Japan.

is an oomycete genus with worldwide distribution, and many of its species cause destructive diseases. In Japan, species are listed as quarantine organisms with the exception of . For effective quarantine control, we designed a genus-specific loop-mediated isothermal amplification (LAMP) primer set and a species-specific quenching probe (QProbe) to establish a simultaneous LAMP-based detection method. Read More

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http://dx.doi.org/10.1094/PDIS-12-19-2523-REDOI Listing

Integrating connectivity theory within watershed modelling part II: Application and evaluating structural and functional connectivity.

Sci Total Environ 2020 Jun 20:140386. Epub 2020 Jun 20.

Dept. of Civil Engineering, University of Kentucky, United States of America.

Integrating connectivity theory within watershed modelling is one solution to overcome spatial and temporal shortcomings of sediment transport prediction, and Part I and II of these companion papers advance this overall goal. In Part II of these companion papers, we investigate sediment flux via connectivity formula discretized over many catchments and then integrated via sediment routing; and we advance model evaluation technology by using hysteresis of sensor data. Model evaluation with hysteresis indices provides nearly a 100% increase in model statistics. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.140386DOI Listing

Exploratory study on the presence of bisphenol A and bis(2-ethylhexyl) phthalate in the Santa Catarina River in Monterrey, N.L., Mexico.

Environ Monit Assess 2020 Jul 4;192(8):488. Epub 2020 Jul 4.

Universidad Autónoma de Chihuahua, Facultad de Ingeniería, UACH-CA-115, Circuito Universitario, Campus II, 31124, Chihuahua, Chih, Mexico.

The current problem related to the supply of drinking water for the metropolitan area of Monterrey, which comprises of five million inhabitants, and the important role played by the El Cuchillo Dam, found downstream of the Santa Catarina River basin as a surface source of drinking water for the city, renders this river an interesting site for assessment. This work evaluates the degree to which the surface water and the subsoil of the river are affected by emerging organic pollutants due to their existence, even at low concentrations, representing a toxic risk enhanced by the absence of stricter standards for regulating these substances. Based on fieldwork, three discharge points that could affect the quality of the surface water were selected: two points on the river stream, and three groundwater wells. Read More

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http://dx.doi.org/10.1007/s10661-020-08446-4DOI Listing

Effect of temperature on phosphorus flux from anoxic western Lake Erie sediments.

Water Res 2020 Jun 8;182:116022. Epub 2020 Jun 8.

University of Toledo, 2801 W. Bancroft, Toledo, OH, 43606, United States.

The western basin of Lake Erie experiences annual Harmful Algal Blooms (HABs), which degrade water quality, threaten drinking water supplies, and deter recreation. The size of HABs in Lake Erie is highly correlated with the external loading of phosphorus (P) from a major tributary, the Maumee River, during spring and summer months. Because HAB size is largely explained by external loading, the contribution of P from lake sediments (internal loading) is considered to be minimal. Read More

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http://dx.doi.org/10.1016/j.watres.2020.116022DOI Listing

Climate change impact assessment on the hydrology of a large river basin in Ethiopia using a local-scale climate modelling approach.

Sci Total Environ 2020 Jun 28;742:140504. Epub 2020 Jun 28.

United Nations University Institute for Integrated Management of Material Fluxes and of Resources (UNU-FLORES), Dresden, Germany; Global Change Research Institute CAS, 603 00 Brno, Czech Republic.

Local-scale climate change adaptation is receiving more attention to reduce the adverse effects of climate change. The process of developing adaptation measures at local-scale (e.g. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.140504DOI Listing

Modeling the ecological status response of rivers to multiple stressors using machine learning: A comparison of environmental DNA metabarcoding and morphological data.

Water Res 2020 Jun 15;183:116004. Epub 2020 Jun 15.

State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.

Understanding the ecological status response of rivers to multiple stressors is a precondition for river restoration and management. However, this requires the collection of appropriate data, including environmental variables and the status of aquatic organisms, and analysis via a suitable model that captures the nonlinear relationships between ecological status and various stressors. The morphological approach has been the standard data collection method employed for establishing the status of aquatic organisms. Read More

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http://dx.doi.org/10.1016/j.watres.2020.116004DOI Listing

Life history and population dynamics of an endangered seahorse (Hippocampus capensis) within an artificial habitat.

J Fish Biol 2020 Jul 4. Epub 2020 Jul 4.

Fisheries Research, NSW Department of Primary Industries, NSW.

Species specific life history information is critical for successful conservation, particularly in establishing an accurate baseline status. Obtaining such information is challenging for most species, but in particular for rare and threatened marine species. To facilitate future conservation of the Endangered Knysna seahorse (Hippocampus capensis) this study aimed to determine important life history information for this species. Read More

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http://dx.doi.org/10.1111/jfb.14452DOI Listing

Energy, exergy, environmental, and economic analysis of natural and forced cooling of solar still with porous media.

Environ Sci Pollut Res Int 2020 Jul 4. Epub 2020 Jul 4.

Technical Industrial Institute, Sohag, Egypt.

The performance of single slope solar still with an enhanced condenser at different saline water mediums in the basin is studied and assessed based on productivity, energy, exergy, economic, and enviroeconomic methodologies. Six solar still configurations are considered: conventional solar still (CSS); modified solar still (MSS) which is a still with heat sink condenser; MSS having an umbrella (MSS + U); MSS with forced-air cooling (MSS + FA); MSS with forced-water cooling (MSS + FW); and finally, MSS with forced-water cooling and contains sand in the basin (MSS + FW + SD). Experiments are conducted under hot and cold climate conditions of Sohag city, Egypt. Read More

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http://dx.doi.org/10.1007/s11356-020-09995-4DOI Listing

Suspended sediment load prediction using artificial neural network and ant lion optimization algorithm.

Environ Sci Pollut Res Int 2020 Jul 3. Epub 2020 Jul 3.

Department of Civil Engineering, Faculty of Engineering, University of Malaya (UM), 50603, Kuala Lumpur, Malaysia.

Suspended sediment load (SSL) estimation is a required exercise in water resource management. This article proposes the use of hybrid artificial neural network (ANN) models, for the prediction of SSL, based on previous SSL values. Different input scenarios of daily SSL were used to evaluate the capacity of the ANN-ant lion optimization (ALO), ANN-bat algorithm (BA) and ANN-particle swarm optimization (PSO). Read More

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http://dx.doi.org/10.1007/s11356-020-09876-wDOI Listing

sp. nov., an endophytic actinomycete isolated from the surface-sterilized root of L.

Int J Syst Evol Microbiol 2020 Jul 3. Epub 2020 Jul 3.

Xinjiang Production & Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin/College of Life Science, Tarim University, Alar 843300, PR China.

A novel Gram-positive, aerobic and motile endophytic actinomycete, designated TRM 65233, was isolated from the root of L. collected from Xinjiang Uygur Autonomous Region of China. The isolate had white aerial mycelium and brown substrate mycelium on Gause's synthetic agar. Read More

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http://dx.doi.org/10.1099/ijsem.0.004299DOI Listing

Major air pollutants seasonal variation analysis and long-range transport of PM in an urban environment with specific climate condition in Transylvania (Romania).

Environ Sci Pollut Res Int 2020 Jul 3. Epub 2020 Jul 3.

Department of Bioengineering, Sapientia Hungarian University of Transylvania, Piaţa Libertăţii 1, 530104, Miercurea Ciuc, Romania.

The air quality decrease, especially in urban areas, is related to local-scale conditions and to dispersion of air pollutants (regional and long-range) as well. The main objective of this study was to decipher the seasonal variation of PM, NO, NO, NO, SO, O, and CO over a 1-year period (2017) and the possible relationships between air pollution and meteorological variables. Furthermore, trajectory cluster analysis and concentration-weighted trajectory (CWT) methods were used to assess the trajectories and the source-receptor relationship of PM in the Ciuc basin Transylvania, known as the "Cold Pole" of Romania. Read More

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http://dx.doi.org/10.1007/s11356-020-09838-2DOI Listing

Hypertension With Brachydactyly Syndrome: A Case Report.

Cureus 2020 May 28;12(5):e8329. Epub 2020 May 28.

Internal Medicine, Permian Internal Medicine Associates, Odessa, USA.

We describe the case of a 23-year-old African American male who presented to the emergency department complaining of unremitting dyspepsia for the last four months. His blood pressure was incidentally found to be 230/157 mm Hg. The initial admitting diagnosis in the intensive care unit was hypertensive "emergency" as he had also displayed acute kidney injury that was deemed to be superimposed on chronic kidney disease. Read More

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http://dx.doi.org/10.7759/cureus.8329DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7325402PMC

Physiological dynamics of chemosynthetic symbionts in hydrothermal vent snails.

ISME J 2020 Jul 2. Epub 2020 Jul 2.

University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, USA.

Symbioses between invertebrate animals and chemosynthetic bacteria form the basis of hydrothermal vent ecosystems worldwide. In the Lau Basin, deep-sea vent snails of the genus Alviniconcha associate with either Gammaproteobacteria (A. kojimai, A. Read More

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http://dx.doi.org/10.1038/s41396-020-0707-2DOI Listing

A new inclusive MLVA assay to investigate genetic variability of Xylella fastidiosa with a specific focus on the Apulian outbreak in Italy.

Sci Rep 2020 Jul 2;10(1):10856. Epub 2020 Jul 2.

Dipartimento di Scienze Agrarie e Forestali (DAFNE), Università della Tuscia, 01100, Viterbo, Italy.

The Olive Quick Decline Syndrome by Xylella fastidiosa subspecies pauca is among the most severe phytopathological emergencies nowadays. In few years, the outbreak devastated olive groves in Apulia (Italy), potentially endangering the entire Mediterranean basin. This research aimed to develop a multiple locus VNTR analysis assay, a molecular tool to differentiate between populations of the pathogen. Read More

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http://dx.doi.org/10.1038/s41598-020-68072-5DOI Listing

A Congo Basin ethnographic analogue of pre-Columbian Amazonian raised fields shows the ephemeral legacy of organic matter management.

Sci Rep 2020 Jul 2;10(1):10851. Epub 2020 Jul 2.

Centre d'Écologie Fonctionnelle et Évolutive, CEFE, Univ Montpellier, CNRS, EPHE, IRD, Univ Paul Valéry Montpellier 3, Montpellier, France.

The functioning and productivity of pre-Columbian raised fields (RFs) and their role in the development of complex societies in Amazonian savannas remain debated. RF agriculture is conducted today in the Congo Basin, offering an instructive analogue to pre-Columbian RFs in Amazonia. Our study of construction of present-day RFs documents periodic addition of organic matter (OM) during repeated field/fallow cycles. Read More

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http://dx.doi.org/10.1038/s41598-020-67467-8DOI Listing

Grey water footprint of agricultural production: An assessment based on nitrogen surplus and high-resolution leaching runoff fractions in Turkey.

Sci Total Environ 2020 Jun 27;742:140553. Epub 2020 Jun 27.

Batman University, Civil Engineering Department, Turkey. Electronic address:

Agricultural activities are responsible for three quarter of global nitrate (NO) pollution. Many surface and ground water resources have been detrimentally affected from high rate of nitrogen (N) deposition due to excessive fertilizer and manure application. Grey water footprint (GWF) is one of the internationally accepted indicators quantifying the environmental effects of contaminants on water bodies. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.140553DOI Listing

Reduction of Human Enteric and Indicator Viruses at a Wastewater Treatment Plant in Southern Louisiana, USA.

Food Environ Virol 2020 Jul 1. Epub 2020 Jul 1.

Interdisciplinary Center for River Basin Environment, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi, 400-8511, Japan.

This study assessed wastewater quality through the quantification of four human enteric viruses and the applicability of pepper mild mottle virus (PMMoV) and tobacco mosaic virus (TMV) as indicators of viral reduction during wastewater treatment. Thirty-three samples were collected from three steps of a wastewater treatment plant in Southern Louisiana, USA for a year between March 2017 and February 2018. Noroviruses of genogroup I were the most prevalent human enteric viruses in influent samples. Read More

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http://dx.doi.org/10.1007/s12560-020-09433-1DOI Listing

Accumulation of trace elements in selected fish and shellfish species from the largest natural carp fish breeding basin in Asia: a probabilistic human health risk implication.

Environ Sci Pollut Res Int 2020 Jul 1. Epub 2020 Jul 1.

Soil and Environment Laboratories, BCSIR Laboratories, Dhaka, Bangladesh.

Intake of fish contaminated with non-essential hazardous trace elements poses a significant risk to human health. In this study, trace elements (As, Pb, Cd, Cu, Ni, and Zn) were measured in edible tissues of seven commercially important fish and shellfish species (Otolithoides pama, Pseudapocryptes elongatus, Macrobrachium rosenbergii, Liza parse, Notropis atherinoides, Apocryptes bato, and Rhinomugil corsula) from a natural carp breeding basin, Halda river, Bangladesh. The elements were detected by inductively coupled plasma-mass spectrometry (ICP-MS), and the hierarchy of elemental levels (mg/kg) was Zn (61. Read More

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http://dx.doi.org/10.1007/s11356-020-09766-1DOI Listing

Inter-basin hydropolitics for optimal water resources allocation.

Environ Monit Assess 2020 Jul 1;192(7):478. Epub 2020 Jul 1.

Department of Geography, University of California, Santa Barbara, CA, 93016-4060, USA.

Efficient, just, and sustainable water resources' allocation is difficult to achieve in multi-stakeholder basins. This study presents a multi-objective optimization model for water resources allocation and reports its application to the Sefidrud basin in Iran. Available water resources are predicted until 2041with the artificial neural network algorithm (ANN). Read More

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http://dx.doi.org/10.1007/s10661-020-08439-3DOI Listing

Forecasting of extreme flood events using different satellite precipitation products and wavelet-based machine learning methods.

Chaos 2020 Jun;30(6):063115

Department of Hydrology, Indian Institute of Technology, Roorkee 247667, India.

An accurate and timely forecast of extreme events can mitigate negative impacts and enhance preparedness. Real-time forecasting of extreme flood events with longer lead times is difficult for regions with sparse rain gauges, and in such situations, satellite precipitation could be a better alternative. Machine learning methods have shown promising results for flood forecasting with minimum variables indicating the underlying nonlinear complex hydrologic system. Read More

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http://dx.doi.org/10.1063/5.0008195DOI Listing

Dynamics editing based on offset boosting.

Chaos 2020 Jun;30(6):063124

Department of Electrical Engineering, City University of Hong Kong, Hong Kong SAR 999077, China.

Multistability in a dynamical system has attracted great attention recently for its complex and unexpected states. Since in most chaotic systems coexisting attractors reside in their own individual basin of attraction with a fractal structure, it becomes a challenge to choose correct initial conditions to obtain desired dynamics. Selecting typical dynamics as the basic components in a dynamical sequence and then arranging them in the phase space in a desired order make the multistability transparent and controllable in the domain of initial conditions; thereafter, one can identify an attractor according to its initial sequence. Read More

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http://dx.doi.org/10.1063/5.0006020DOI Listing

Introduction to Focus Issue: Symmetry and optimization in the synchronization and collective behavior of complex systems.

Chaos 2020 Jun;30(6):060401

Clarkson Center for Complex Systems Science, Potsdam, New York 13699, USA.

Synchronization phenomena and collective behavior are commonplace in complex systems with applications ranging from biological processes such as coordinated neuron firings and cell cycles to the stability of alternating current power grids. A fundamental pursuit is the study of how various types of symmetry-e.g. Read More

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http://dx.doi.org/10.1063/5.0016491DOI Listing

Well Logging Based Lithology Identification Model Establishment Under Data Drift: A Transfer Learning Method.

Sensors (Basel) 2020 Jun 29;20(13). Epub 2020 Jun 29.

Department of Automation, University of Science and Technology of China, Hefei 230027, China.

Recent years have witnessed the development of the applications of machine learning technologies to well logging-based lithology identification. Most of the existing work assumes that the well loggings gathered from different wells share the same probability distribution; however, the variations in sedimentary environment and well-logging technique might cause the data drift problem; i.e. Read More

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http://dx.doi.org/10.3390/s20133643DOI Listing

[Profiles and Risk of Antibiotic Resistance Genes in Domestic Wells in the Maozhou River Basin].

Huan Jing Ke Xue 2020 Jul;41(7):3222-3230

Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, Ministry of Education Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China.

Intensive use of antibiotics promotes the occurrence and development of antibiotic resistance. Antibiotic resistance genes (ARGs) enter water environments from human and animal sources. Groundwater serves as an important water supply, while the profiles and risk of ARGs in groundwater remain unknown. Read More

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http://dx.doi.org/10.13227/j.hjkx.201911256DOI Listing

[Analysis of Nitrogen Pollution and Its Pollution Sources in the Muli River Basin].

Huan Jing Ke Xue 2020 Jul;41(7):3165-3174

Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.

To identify the sources of nitrogen pollutants in the Muli River basin in the Guangdong-Hong Kong-Macao Greater Bay Area, ammonium salt isotope tracer technology, nitrate isotope tracer technology, and a multiple linear mixing model were applied in this study to effectively identify the changes of nitrogen sources in the basin. The results showed that nitrogen pollution in the Muli River basin was serious, and the concentrations of NH-N and NO-N in the confluence were higher than in the two tributaries. In addition, although there was no obvious population residence at the upstream or downstream of the Muli River basin, higher nitrogen pollution still occurred at some sites (Dakengshan tributary and aquiculture area). Read More

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http://dx.doi.org/10.13227/j.hjkx.201912058DOI Listing

[Analysis of Nitrate Sources in Different Waters of a Karst Basin].

Huan Jing Ke Xue 2020 Jul;41(7):3157-3164

College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China.

To identify the sources and transformation processes of nitrate in surface water and groundwater in a karst basin, water samples were collected in the Songbai Mountain Reservoir basin during the normal and dry seasons. The spatio-temporal distribution, sources, and transformation processes of nitrate in the waters were analyed using a hydrochemical and stable isotopic (N-NO, O-NO, and O-HO) multi-tracing approach. The contribution rates of different nitrate sources in surface and groundwater were estimated based on the SIAR model. Read More

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http://dx.doi.org/10.13227/j.hjkx.201911146DOI Listing

[Analysis of Transport Pathways and Potential Sources of Atmospheric Particulate Matter in Zigong, in South of Sichuan Province].

Huan Jing Ke Xue 2020 Jul;41(7):3021-3030

Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China.

Atmospheric particulate matter pollution in Zigong City in southern Sichuan is quite severe. The average concentrations of PM and PM from 2015 to 2018 were (95.42±9. Read More

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http://dx.doi.org/10.13227/j.hjkx.201911096DOI Listing

[Identifying Nitrate Sources in a Typical Karst Underground River Basin].

Huan Jing Ke Xue 2020 Jun;41(6):2664-2670

Key Laboratory of Karst Dynamics Laboratory, Ministry of Land and Resources & Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China.

Underground rivers are an important source of groundwater in karst area. Recently, nitrate pollution of underground rivers has become a serious issue. To identify the sources of nitrate in Guancun typical karst underground river basin, stable isotope techniques (N-NO, O-NO, and O-HO) were applied in this study. Read More

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http://dx.doi.org/10.13227/j.hjkx.201911046DOI Listing

[Adsorption of Low-Concentration Phosphorus from Water by Composite Metal Modified Biochar].

Huan Jing Ke Xue 2020 Feb;41(2):784-791

Basin Water Environmental Research Department, Changjiang River Scientific Research Institute, Changjiang Water Resources Commission, Wuhan 430010, China.

In this study, we synthesized composite metal modified biochar using fruit shell biochar impregnated with ferric chloride and potassium permanganate. We investigated its potential to adsorb phosphorus at low concentrations. Results show that the adsorption of low-concentration phosphorus by Fe and Mn modified biochar was significantly better than by non-modified biochar. Read More

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http://dx.doi.org/10.13227/j.hjkx.201904058DOI Listing
February 2020

[Spatio-Temporal Variation of Release Flux of Sediment Nitrogen and Phosphorus in High-Risk Period of Algal Bloom in Lake Erhai].

Huan Jing Ke Xue 2020 Feb;41(2):734-742

College of Hydraulic&Environmental Engineering, China Three Gorges University, Yichang 443002, China.

Spatial and temporal characteristics of release fluxes of sediment nitrogen (N) and phosphorus (P) were investigated in the high-risk period of algal blooms in Lake Erhai. Moreover, the influence factors were examined. Results show that the release flux of N and P increased in recent years, exhibiting a clear increase in the period from 2009 to 2013, and a slight increase in the period since 2013. Read More

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http://dx.doi.org/10.13227/j.hjkx.201907160DOI Listing
February 2020

[Characteristics and Significance of Stable Isotopes and Hydrochemistry in Surface Water and Groundwater in Nanxiaohegou Basin].

Huan Jing Ke Xue 2020 Feb;41(2):682-690

Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China.

The Nanxiaohegou basin is a typical watershed in the gully region of the Loess Plateau, China. The stable isotopes of hydrogen and oxygen and the hydrochemistry of the surface water and groundwater in the region were characterized in this study. The interaction between the surface water and groundwater in the region was demonstrated based on stable isotopes and hydrochemical methods. Read More

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http://dx.doi.org/10.13227/j.hjkx.201905184DOI Listing
February 2020

[Influencing Factors of Long-term Variations on Gridded PM of Typical Regions in China Based on GAM Model].

Huan Jing Ke Xue 2020 Feb;41(2):499-509

National Meteorological Center, Beijing 100081, China.

This study investigates annually-averaged surface PM concentrations with the spatial resolution of 0.01°×0.01° to explore spatio-temporal variations and influencing factors of annual PM over typical regions in China during the period of 1998-2016, applying the generalized additive model (GAM). Read More

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http://dx.doi.org/10.13227/j.hjkx.201905090DOI Listing
February 2020

[Chemical Evolution of Groundwater in the Tacheng Basin of Xinjiang in the Process of Urbanization].

Huan Jing Ke Xue 2020 Mar;41(3):1197-1206

Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China.

With the development of the local economy, the volume of groundwater production has increased continuously in the past decades in the Tacheng Basin of the Xinjiang Uygur Automous Region. Previous studies have not provided a clear pattern of the chemical composition evolution of groundwater and its driving force in this basin, which makes the future development and utilization of groundwater riskier. This study carried out systematic sampling and analysis of groundwater chemistry in this basin, and the chemical evolution of groundwater in the basin was analyzed by comparison with historical hydrochemical data. Read More

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http://dx.doi.org/10.13227/j.hjkx.201908192DOI Listing

[Water Sources and Factors Controlling Hydro-chemical Compositions in the Yiluo River Basin].

Huan Jing Ke Xue 2020 Mar;41(3):1184-1196

School of Resources and Environment, Henan Polytechnic University, Jiaozuo 454000, China.

An important tributary in the middle stream of the Yellow River, the Yiluo River consists of the Luohe River and Yihe River, which converge at Yanshi City. Mining activities were widely distributed in the upstream of the Yiluo River Basin (YRB), while residential areas concentrated in the downstream were coupled with extensively industrial and agricultural activities. To illustrate the influences of variable anthropogenic activities on the hydro-chemical composition of river water of the YRB, water samples from the main stream and tributaries were collected in the flood season (August) and normal season (December), respectively. Read More

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http://dx.doi.org/10.13227/j.hjkx.201908116DOI Listing

Quantification of groundwater-agricultural soil quality and associated health risks in the agri-intensive Sutlej River Basin of Punjab, India.

Environ Geochem Health 2020 Jun 30. Epub 2020 Jun 30.

Health Physics Division, Bhabha Atomic Research Centre, Mumbai, India.

The quality of drinking water and agricultural soil significantly affects the health of residents of the area. The quality of groundwater used as drinking and irrigation water along with agricultural soil of an agri-intensive region of the Sutlej River Basin (SRB), Punjab (India), has been investigated in the present paper to further access their impacts on human health. The quality parameters studied are pH, conductivity, cations, anions and trace elements/heavy metals. Read More

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http://dx.doi.org/10.1007/s10653-020-00636-wDOI Listing

Noncrop features and heterogeneity mediate overwintering bird diversity in agricultural landscapes of southwest China.

Ecol Evol 2020 Jun 29;10(12):5815-5828. Epub 2020 Apr 29.

Key Laboratory for Biodiversity Science and Ecological Engineering College of Life Sciences Beijing Normal University Beijing China.

Farmland birds are of conservation concerns around the world. In China, conservation management has focused primarily on natural habitats, whereas little attention has been given to agricultural landscapes. Although agricultural land use is intensive in China, environmental heterogeneity can be highly variable in some regions due to variations in crop and noncrop elements within a landscape. Read More

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http://dx.doi.org/10.1002/ece3.6319DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319240PMC

Ringed seal () seasonal movements, diving, and haul-out behavior in the Beaufort, Chukchi, and Bering Seas (2011-2017).

Ecol Evol 2020 Jun 5;10(12):5595-5616. Epub 2020 May 5.

Alaska Department of Fish and Game Arctic Marine Mammal Program Fairbanks AK USA.

Continued Arctic warming and sea-ice loss will have important implications for the conservation of ringed seals, a highly ice-dependent species. A better understanding of their spatial ecology will help characterize emerging ecological trends and inform management decisions. We deployed satellite transmitters on ringed seals in the summers of 2011, 2014, and 2016 near Utqiaġvik (formerly Barrow), Alaska, to monitor their movements, diving, and haul-out behavior. Read More

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http://dx.doi.org/10.1002/ece3.6302DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319173PMC

Hydrogen Incorporation in Plagioclase.

Geochim Cosmochim Acta 2020 May 18;277:87-110. Epub 2020 Mar 18.

Department of Earth and Environmental Sciences, University of Minnesota, 150 Tate Hall, Minneapolis, MN, 55455, U.S.A.

We conducted experiments at high pressure () and temperature () to measure hydrogen solubility in plagioclase (Pl) with a range of compositions (An to An). Experiments were run at 700-850 °C, 0.5 GPa, and close to either the Ni-NiO (NNO) or iron-wüstite (IW) oxygen buffers. Read More

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http://dx.doi.org/10.1016/j.gca.2020.03.013DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7325727PMC

Increased extreme hourly precipitation over China's rice paddies from 1961 to 2012.

Sci Rep 2020 Jun 30;10(1):10609. Epub 2020 Jun 30.

Laboratory for Earth Surface Processes, Sino-France Institute of Earth Systems Science, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, People's Republic of China.

Rice yield have been affected by the increased extreme precipitation events in recent decades. Yet, the spatio-temporal patterns of extreme precipitation by rice type and phenology remain elusive. Here, we investigate the characteristics of four extreme precipitation indices across China's rice paddy and their potential association with crop yields, by using hourly precipitation data from 1,215 stations and rice phenology observations from 45 sub-regions. Read More

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http://dx.doi.org/10.1038/s41598-020-67429-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7326977PMC

Future river basin health assessment through reliability-resilience-vulnerability: Thresholds of multiple dryness conditions.

Sci Total Environ 2020 Jun 20;741:140395. Epub 2020 Jun 20.

School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai 200241, China; Institute of Eco-Chongming (IEC), Shanghai 200062, China.

Increasing dryness conditions under global warming are posing severe threats to water resources management in China. Projecting river basin responses to dryness conditions is beneficial to effectively managing water resources. However, existing studies have seldom considered the impact of multiple dryness conditions on future river basin health under global warming. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.140395DOI Listing

Alleviating water scarcity and poverty in drylands through telecouplings: Vegetable trade and tourism in northwest China.

Sci Total Environ 2020 Jun 20;741:140387. Epub 2020 Jun 20.

Center for Systems Integration and Sustainability, Michigan State University, East Lansing, USA.

Water scarcity and poverty are among the most significant global challenges, especially in the world's arid regions. Many countries have been trying to address these challenges. Facilitated by the construction of infrastructure (e. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.140387DOI Listing

Adaptive Bipartite Tracking Control of Nonlinear Multiagent Systems With Input Quantization.

IEEE Trans Cybern 2020 Jun 30;PP. Epub 2020 Jun 30.

This article studies the bipartite tracking control problem of distributed nonlinear multiagent systems with input quantization, external disturbances, and actuator faults. We use the radial basis function (RBF) neural networks (NNs) to model unknown nonlinearities. Due to the fact that the upper bounds of disturbances and the number of actuator faults are unknown, an intermediate control law is designed based on a backstepping strategy, where a compensation term is introduced to eliminate external disturbances and actuator faults. Read More

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http://dx.doi.org/10.1109/TCYB.2020.2999090DOI Listing

Fault seal analysis in an onshore unconventional gas target, North Perth Basin.

Ground Water 2020 Jun 29. Epub 2020 Jun 29.

University of Auckland, Australia.

During the 1980's, hydrocarbons were logged in aquifers during drilling of conventional gas wells in the Woodada gasfield. The gasfield is located in the North Perth Basin in Western Australia. Using Fault Seal Analysis Technology, our goal was to test the hypothesis that faults in the Kockatea Shale that are currently being reactivated may be leak prone. Read More

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http://dx.doi.org/10.1111/gwat.13026DOI Listing

Evaluating the CO geological storage suitability of coal-bearing sedimentary basins in China.

Environ Monit Assess 2020 Jun 29;192(7):462. Epub 2020 Jun 29.

School of Earth Science and Resources, Chang'an University, Xi'an, 710054, China.

The geological storage of CO is potentially one of the most effective methods to reduce the CO concentration in the atmosphere. Coalbeds are possibly suitable storage reservoirs, meaning that evaluating the suitability of individual coalbeds and associated engineering and construction is an important step in developing geological CO storage. This evaluation requires the development of a reasonable evaluation index system and associated weightings. Read More

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http://dx.doi.org/10.1007/s10661-020-08424-wDOI Listing