检索结果-南通市图书馆

Spatial and temporal dynamics of microbial community composition and factors influencing the Surface water and sediments of urban rivers

引用

Journal of Environmental Sciences 2023年第2期124卷 187-197页

作者： Hongjie Wang Xingchun Liu Yali Wang Shengqi Zhang Guangming Zhang Yangyang Han Mengxiang Li Ling Liu College of Ecology and Environment Hebei UniversityBaoding 071002China Institute of Life Science and Green Development Hebei UniversityBaoding 071002China Hebei Key Laboratory of Close-to-Nature Restoration Technology of Wetlands Baoding 071002China School of Energy and Environmental Engineering Hebei University of TechnologyTianjin 300130China

The temporal and spatial characteristics of urban river bacterial communities help us understand the feedback mechanism of bacteria to changes in the aquatic environment.The Fuhe River plays an important role in determining the water ecological environment of Baiyangdian Lake.16S rRNA gene sequencing was used to study the microbial distribution characteristics in the Fuhe River in different seasons.The results showed that some environmental factors of the Surface water(ammonia nitrogen(NH_(3)^(-)N),total nitrogen(TN),and total phosphorus(TP))were different on the spatial and temporal scales.Moreover,there were no seasonal differences in the contents of TN,TP,total organic carbon(TOC),or heavy metals in the sediments.The distributions of Cyanobacteria,Actinomycetes and Firmicutes in the water and Actinomycetes and Planctomycetes in the sediments differed significantly among seasons(PSurface water,with the highest abundance of Proteobacteria recorded in the river along with the highest nutrient concentration,while the abundance of Bacteroidetes was higher in the upstream than the downstream.Microbial communities in the water weremost sensitive to temperature(T)and the TP concentration(P<0.01).Moreover,differences in the bacterial community were better explained by the content of heavy metals in the sediments than by the chemical characteristics.A PICRUStmetabolic inference analysis showed that the effect of high summer temperatures on the enzyme action led to an increase in the abundances of the metabolic-related genes of the river microorganisms.

关键词： Fuhe river Surface water Sediment Bacterial community Spatial and temporal distribution Functional prediction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Monitoring Surface water Change in Northeast China in 1999–2020:Evidence from Satellite Observation and Refined Classification

引用

Chinese Geographical Science 2024年第1期34卷 106-117页

作者： LIU Kai ZHANG Dapeng CHEN Tan CUI Peipei FAN Chenyu SONG Chunqiao Key Laboratory of watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing210008China University of Chinese Academy of Sciences Nanjing(UCASNJ)Nanjing211135China Geographic Information and Tourism College Chuzhou UniversityChuzhou239000China

As a typical region with high water demand for agricultural production,understanding the spatiotemporal Surface water changes in Northeast China is critical for water resources management and sustainable development.However,the long-term variation characteristics of Surface water of different water body types in Northeast China remain rarely explored.This study investigated how Surface water bodies of different types(e.g.,lake,reservoir,river,coastal aquaculture,marsh wetland,ephemeral water) changed during1999–2020 in Northeast China based on various remote sensing-based datasets.The results showed that Surface water in Northeast China grew dramatically in the past two decades,with an equivalent area increasing from 24 394 km^(2) in 1999 to 34 595 km^(2) in 2020.The surge of ephemeral water is the primary driver of Surface water expansion,which could ascribe to shifted precipitation pattern.Marsh wetlands,rivers,and reservoirs experienced a similar trend,with an approximate 20% increase at the interdecadal scale.By contrast,coastal aquacultures and natural lakes remain relatively stable.This study is expected to provide a more comprehensive investigation of the Surface water variability in Northeast China and has important practical significance for the scientific management of different types of Surface water.

关键词： Surface water spatiotemporal variation water body classification remote sensing Northeast China

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hydrochemical Characterization,Controlling Factors and water Quality of Surface water in Shandong Province,North China

引用

Journal of Earth Science 2024年第1期35卷 155-166页

作者： Ran An Jiutan Liu Zongjun Gao Changsuo Li Yuming Peng School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China 801 Institute of Hydrogeology and Engineering Geology Shandong Provincial Bureau of Geology&Mineral ResourcesJinan 250014China Key Laboratory of Groundwater Resources and Environment Shandong Provincial Bureau of Geology&Mineral ResourcesJinan 250014China Shandong Engineering Research Center for Groundwater Environmental Protection and Remediation Jinan 250014China

In this study,90 Surface water samples were collected from Shandong Province(SDP)in the dry and wet seasons and analyzed using statistical analysis,hydrochemical methods and water quality index(WQI).The content of main ions showed seasonal variations,with a higher average value in the dry season than in the wet season.Sampling points exhibiting high contents of the main chemical components were mainly distributed in areas southwest of SDP,north of Weifang,and around Jinan.The saturation index of carbonate minerals was greater than zero,while that of evaporite minerals was less than zero.The hydrochemical characteristics of Surface water are mainly dominated by rock weathering as well as cation exchange.In addition,Surface water in SDP has significantly been affected by anthropogenic factors.Most of the Surface water could be classified as weakly alkaline soft-fresh water,with the hydrochemical types of SO_(4)·Cl-Ca·Mg and SO_(4)·Cl-Na.In terms of WQI,47.88% and 37.88% of the water samples in SDP were classified as poor water in the dry and wet seasons,respectively.On the whole,the water quality is higher in the wet season than in the dry season,and Surface water in SDP is generally suitable for agricultural irrigation.

关键词： Surface water hydrochemical characteristics controlling factors water quality Shandong Province

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Transformation among precipitation,Surface water,groundwater,and mine water in the Hailiutu River Basin under mining activity

引用

Journal of Arid Land 2022年第6期14卷 620-636页

作者： LI Qian MA Long LIU Tingxi College of water Conservancy and Civil Engineering College Inner Mongolia Agricultural UniversityHohhot 010018China

Coal mining has changed the hydrogeological conditions of river basins,and studying how the relationship among different types of water body has changed under the influence of coal mining is of great significance for understanding the regional hydrological cycle.We analyzed the temporal and spatial distribution of hydrochemical properties and environmental isotopes in the Hailiutu River Basin(HRB),China with a mixed model.The results showed that:(1)human activity(e.g.,coal mining and agricultural production)causes considerable changes in the hydrochemical properties of Surface water in and around the mining areas,and leads to significant increases in the concentrations of Na^(+)and SO_(4)^(2-);(2)precipitation is the main source of water vapour in the HRB.The transformation between Surface water and groundwater in the natural watershed is mainly affected by precipitation;and(3)in the mining areas,the average contribution rates of precipitation to the recharge of Surface water and groundwater increased by 2.6%-7.9%and 2.7%-9.9%,respectively.Groundwater in the Salawusu Formation constitutes up to 61.3%-72.4%of mine water.Overall,this study is beneficial for quantifying the effects of coal mining on local hydrological cycles.The research results can provide a reference for local water resources management and ecological environment improvement.

关键词： precipitation mine water groundwater Surface water transformation mode

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Surface water and aerosol spatiotemporal dynamics and influence mechanisms over drylands

引用

Geoscience Frontiers 2023年第2期14卷 295-310页

作者： Xiangyue Chen Hongchao Zuo Wenpeng Wang Jikai Duan Mingheng Chang Jingzhe Wang College of Atmospheric Sciences Lanzhou UniversityLanzhou 730000China School of Artificial Intelligence Shenzhen PolytechnicShenzhen 518055China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

Under the background of global warming and excessive human activities,much Surface water in drylands is experiencing rapid degradation or shrinkage in recent years.The shrinkage of Surface water,especially the degradation of lakes and their adjacent wetlands in drylands,may lead to the emergence of new salt dust storm hotspots,which causes greater danger.In this paper,based on high spatial resolution global Surface water(GSW)and multiangle implementation of atmospheric correction(MAIAC)AOD data,we systematically analyze the dynamic characteristics of Surface water and aerosols in typical drylands(Central Asia,CA)between 2000 and 2018.Simultaneously,combined with auxiliary environment variables,we explore the driving mechanisms of Surface water on the regional salt/sand aerosols on different spatial scales.The results show that the seasonal Surface water features an increasing trend,especially a more dramatic increase after 2015,and the permanent Surface water indicates an overall decrease,with nearly 54.367%at risk of receding and drying up.In typical lakes(Aral Sea and Ebinur Lake),the interannual change feature of the Surface water area(WA)is that a continuous decrease during the study period occurs in Aral Sea area,yet a significant improvement has occurred in Ebinur Lake after 2015,and the degradation of Ebinur Lake takes place later and its recovery earlier than Aral Sea.The aerosol optical depth(AOD)in CA shows obvious seasonal variation,with the largest in spring(0.192±0173),next in summer(0.169±0.106),and the smallest in autumn(0.123±0.065).The interannual variation of AOD exhibits an increase from 2000 to 2018 in CA,with high AOD areas mainly concentrated in the Taklamakan Desert and some lake beds resulting from lake degradation,including Aral Sea and Ebinur Lake.The AOD holds a similar trend between Aral Sea and Ebinur Lake on an interannual scale.And the AOD over Ebinur Lake is lower than that over Aral Sea in magnitude and lags behind in reaching the peak compared with Aral Sea.The WA change can sign

关键词： Surface water Aerosols PLS-SEM Central Asia Aral Sea Ebinur Lake

来源：

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

Nitrated and parent PAHs in the Surface water of Lake Taihu,China:Occurrence,distribution,source,and human health risk assessment

引用

Journal of Environmental Sciences 2021年第4期33卷 159-169页

作者： Jijie Kong Yuxuan Dai Mengshu Han Huan He Jiapeng Hu Junyi Zhang Junzhe Shi Qiming Xian Shaogui Yang Cheng Sun The State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China School of Environment Nanjing Normal UniversityNanjing 210023China College of Ecological and Resource Engineering Fujian Provincial Key laboratory of Eco-Industrial Green TechnologyWuyi UniversityWuyishan 354300China Wuxi Environmental Monitoring Centre Wuxi 214121China

Nitrated polycyclic aromatic hydrocarbons(NPAHs)have toxic potentials that are higher than those of their corresponding parent polycyclic aromatic hydrocarbons(PAHs)and thus have received increasing attention in recent years.In this study,the occurrence,distribution,source,and human health risk assessment of 15 NPAHs and 16 PAHs were investigated in the Surface water from 20 sampling sites of Lake Taihu during the dry,normal,and flood seasons of 2018.The PAH concentrations ranged from 255 to 7298 ng/L and the NPAH concentrations ranged from not-detected(ND)to 212 ng/L.Among the target analytes,2-nitrofluorene(2-n Flu)was the predominant NPAH,with a detection frequency ranging from 85%to 90%and a maximum concentration of 56.2 ng/L.The three-ringed and four-ringed NPAHs and PAHs comprised the majority of the detected compounds.In terms of seasonal variation,the highest levels of the NPAHs and PAHs were in the dry season and flood season,respectively.Diagnostic ratio analysis indicated that the prime source of NPAHs was direct combustion,whereas in the case of PAHs the contribution was predominantly from a mixed pattern including pollution from unburned petroleum and petroleum combustion.The human health risk of NPAHs and PAHs was evaluated using a lifetime carcinogenic risk assessment model.The carcinogenic risk level of the targets ranged from 2.09×10^(-7)to 5.75×10^(-5)and some Surface water samples posed a potential health risk.

关键词： Nitrated polycyclic aromatic hydrocarbons Surface water Occurrence Seasonal variation Human health risk assessment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A comparison study of the start-up of a MnO_x filter for catalytic oxidative removal of ammonium from groundwater and Surface water

引用

Journal of Environmental Sciences 2018年第3期30卷 327-334页

作者： Ya Cheng Ye Li Tinglin Huang Yuankui Sun Xinxin Shi Yuezong Shao Key Laboratory of Northwest Resource Environment and Ecology MOE Xi'an University of Architecture and Technology Shaanxi Key Laboratory of Environmental Engineering Xi'an University of Architecture and Technology

As an efficient method for ammonium（NH4~＋）removal,contact catalytic oxidation technology has drawn much attention recently,due to its good low temperature resistance and short start-up period.Two identical filters were employed to compare the process for ammonium removal during the start-up period for ammonium removal in groundwater（Filter-N）and Surface water（Filter-S）treatment.Two types of source water（groundwater and Surface water）were used as the feed waters for the filtration trials.Although the same initiating method was used,Filter-N exhibited much better ammonium removal performance than Filter-S.The differences in catalytic activity among these two filters were probed using X-ray diffraction（XRD）,scanning electron microscopy（SEM）,X-ray photoelectron spectroscopy（XPS）,and compositional analysis.XRD results indicated that different manganese oxide species were formed in Filter-N and Filter-S.Furthermore,the Mn3p XPS spectra taken on the surface of the filter films revealed that the average manganese valence of the inactive manganese oxide film collected from Filter-S（FS-MnOx）was higher than in the film collected from Filter-N（FN-MnOx）.Mn（IV）was identified as the predominant oxidation state in FS-MnOxand Mn（III）was identified as the predominant oxidation state in FN-MnOx.The results of compositional analyses suggested that polyaluminum ferric chloride（PAFC）used during the Surface water treatment was an important factor in the mineralogy and reactivity of MnOx.This study provides the theoretical basis for promoting the wide application of the technology and has great practical significance.

关键词： Ammonium removal Surface water Underground water Start-up Catalytic oxidation Filtration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hydrogeological Investigations of Groundwater and Surface water Interactions in the Berg River Catchment, Western Cape, South Africa

引用

Journal of Environmental & Earth Sciences 2023年第2期5卷 102-117页

作者： Seiphi Prudence Mabokela Ntokozo Malaza Department of Occupational and Environmental Studies Faculty of Applied ScienceCape Peninsula University of TechnologyCape Town7530South Africa Department of water and Sanitation Pretoria0001South Africa

The Berg River Catchment based in the Western Cape Province,South Africa services the greater Cape Town area with water,subsequent to supplying the vast agricultural activities that exist in the middle and the lower reaches.This study thus investigates the hydrogeochemical interactions between surface and groundwater in the Berg River Catchment with the aim of establishing trends and transfer of constituents between the surface and groundwater systems,investigates the role that geology plays in water chemistry as well as identifies the geochemical processes controlling surface and groundwater chemistry in the catchment.This study was carried out using three types of research designs namely i)experimental research design;ii)field research design and meta-analysis research design.Furthermore,the study made use of hydrochemical data ranging from 2003 to 2013 obtained from the National water Monitoring Database owned and maintained by the Department of water and Sanitation and data that were sampled in 2016 by authors and analyzed using the ICP-MS Technique Ground water Chart,Arc-GIS and Geosoft(Oasis Montaj)were further employed to model the data.The results indicated that:i)in the Upper Berg there is not much interaction and transfer of constituents between surface and groundwater;ii)the Middle Berg,however,indicated a degree of interaction with the sharing of constituents between the two water systems and iii)the Lower Berg indicated only NaCl water type also noting that the area situated near the river mouth whereby there is the mixing of river and seawater.

关键词： Hydrogeology Groundwater Surface water Interactions Berg River Catchment

来源：

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

The distribution and ecological risks of antibiotics in Surface water in key cities along the lower reaches of the Yellow River:A case study of Kaifeng City,China

引用

China Geology 2022年第3期5卷 411-420页

作者： Dun-yu Lü Chu Yu Zi-jun Zhuo Shu-ran Meng Song-bo Liu Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuang 050061China Key Laboratory of Groundwater Sciences and Engineering Ministry of Natural ResourcesZhengding 050803China China University of Geosciences(Beijing) Beijing 100083China

A large number of antibiotics have been discharged into rivers by human activities,posing a threat to aquatic ecosystems.The Surface water of the Yellow River Basin also suffers antibiotic pollution,which hinders the improvement in the aquatic ecological environment.This study investigated and analyzed the characteristics and assessed the ecological risks of antibiotic pollution in Surface water bodies such as canals,rivers and fish ponds in Kaifeng,Henan Province,which is a key city along the lower reaches of the Yellow River.The test results are as follows.A total of 15 types of antibiotics were detected in the Surface water.They had a total antibiotic concentration of 12.2-249.9μg/L,of which tetracyclines(TCs)and quinolones accounted for the highest percentages.Six types of quinolones had detection rates of up to 100%,and doxycycline(DC)and oxytetracycline(OTC)had average concentrations of 29.52μg/L1 and 13.71μg/L,respectively.The major canals with water diverted from the Yellow River had total concentrations of quinolones and TCs of 22.0μg/L and 14.9μg/L,respectively,which were higher than those in previous studies.This phenomenon may be related to the decrease in the water flow of the Yellow River during the dry season and the increase in the antibiotic consumption of residents in the context of the Covid-19 outbreak.The upper reaches of the Huiji River in the Xiangfu District had higher antibiotic content than other districts in Kaifeng.Specifically,TCs accounted for 72.38%-91.84%of all antibiotics,and the DC and OTC concentrations were significantly higher than other antibiotics in the upper reaches.As indicated by the ecological risk assessment results,TCs had the highest ecological risks to green algae.Among them,DC had medium-high risks;TC,OTC,and chlortetracycline(CTC)had medium-high risks;trimethoprim(TMP)and lomefloxacin(LOM)had low risks;other TC antibiotics had no risk.Compared with green algae,most antibiotics showed higher ecological risks to daphnia and lower ecological risks to fish.DC and OTC

关键词： Surface water Antibiotics COVID-19 epidemic Distribution characteristic Ecological risk Hydrogeological engineering Kaifeng City Yellow River China A

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Impact of transferred water on the hydrochemistry and water quality of Surface water and groundwater in Baiyangdian Lake,North China

引用

Geoscience Frontiers 2021年第3期12卷 104-112页

作者： Yong Zhao Jingyan Han Bing Zhang Jiaguo Gong State Key Laboratory of Simulation and Regulation of water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China College ofwater Conservancy Engineering Tianjin Agricultural UniversityTianjin 300384China Tianjin Key Laboratory of water Resources and Environment Tianjin Normal University300387 TianjinChina

The hydrochemical composition of Surface water and groundwater is a key parameter for understanding the evolution of water and its quality.In particular,little is known about the impact of transferred water on Surface water and groundwater.In this study,Baiyangdian Lake was selected as a typical area for extensive groundwater exploration and Surface water transfer in the North China Plain.Surface water and groundwater samples were sampled in dry/wet seasons and then analyzed before/after the water transfer,respectively.Generally,Surface water and groundwater are extensively hydrologically connected based on hydrochemical evidence.It was found that the hydrochemical composition of the shallow groundwater is affected by the Surface water and that the water quality of the deep groundwater is stable.However,inter-aquifer recharge processes from the shallow groundwater to the deep groundwater existed in the anthropogenic region impacted with high nitrate-ion concentrations.Also,the hydrochemical composition of the Surface water and groundwater was dominated by rock-weathering and evaporation-precipitation processes.Due to the existence of the deep vadose zone in the alluvial fan,Na^(+)was exchanged into soil matrices during the leakage of the Surface water.In addition,the transferred water resulted in Surface water with good quality,and it also played as an important recharge source to groundwater.As the most important water resource for irrigation and drinking,deep groundwater should be paid more attention in the alluvial fan with frequent water transfer and extensive groundwater exploration.

关键词： Hydrochemical composition Surface water Groundwater water transfer Baiyangdian Lake

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：