LIVIVO - Search results -

Search results

Result 1 - 10 of total 2924

Search options

Article: [Spatio-temporal Evolution and Relationship of Water Environment Quality and Phytoplankton Community in Wenyu River].

Zhu, Li-Ying / Chen, Yuan-Yuan / Liu, Jing / Wang, Ya-Wei / Wang, Chun-Rong / Wei, Yuan-Song / Zhang, Yu-Xin

Huan jing ke xue= Huanjing kexue

2020 Volume 41, Issue 2, Page(s) 702–712

Abstract: The Wenyu River is an important ecological corridor of Beijing. In this study, the spatio-temporal ... dynamics of water quality and phytoplankton community in the Wenyu River in 2006, 2011, and 2018, as well ... that the water quality in the Wenyu River improved significantly from serious pollution owing to pollution containment ...

Abstract	The Wenyu River is an important ecological corridor of Beijing. In this study, the spatio-temporal dynamics of water quality and phytoplankton community in the Wenyu River in 2006, 2011, and 2018, as well as their relationship were thoroughly analyzed by historical data analysis and field surveys. Results show that the water quality in the Wenyu River improved significantly from serious pollution owing to pollution containment. The major water pollutant has shifted from ammonia nitrogen (NH
MeSH term(s)	Beijing ; China ; Phytoplankton/classification ; Rivers ; Seasons ; Spatio-Temporal Analysis ; Water Pollution/analysis ; Water Quality
Language	Chinese
Publishing date	2020-07-10
Publishing country	China
Document type	Journal Article
ISSN	0250-3301
ISSN	0250-3301
DOI	10.13227/j.hjkx.201906207
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Heavy Rainfall Events Following the Dry Season Elevate Metal Contamination in Mining-Impacted Rivers: A Case Study of Wenyu River, Qinling, China.

Chen, Dong / Chen, Yi-Ping / Lin, Yishan

Archives of environmental contamination and toxicology

2021 Volume 81, Issue 2, Page(s) 335–345

Abstract: Heavy metal pollution of a mining-impacted river-the Wenyu River-and a short section of the river ... the following: (1) The Wenyu River was severely polluted by acid mine drainage from an open-pit molybdenum (Mo ... an increasing tendency along the Wenyu River and Luo River. (3) The heavy rainfall following the prolonged ...

Abstract	Heavy metal pollution of a mining-impacted river-the Wenyu River-and a short section of the river it joins, the Luo River, were investigated after heavy rainfall following a dry season in March 2015 and during a normal flow season in May 2015. Water samples were collected during these two periods, and sediment samples were obtained in May as the rain washed out the sediments in March. The results showed the following: (1) The Wenyu River was severely polluted by acid mine drainage from an open-pit molybdenum (Mo) mine, and the major pollutants in the water according to Chinese national standard values were acid (pH), sulfate, Cu, Zn, Mn, Ni, and Cd. The major pollutants in the sediment were Cu, Zn, and Cd, as indicated by the geoaccumulation index and potential ecological risk index. (2) The major pollutants in the water were naturally attenuated along the river and met the national standard values after joining the Luo River, except Mn in both water samples and Cd in the samples after rain in March. The major pollutants in the sediments showed an increasing tendency along the Wenyu River and Luo River. (3) The heavy rainfall following the prolonged dry season increased acid and heavy metal contamination in the river, which might be attributed to the dissolution of efflorescent salts and the weathering and erosion of mining residues. Thus, the first heavy rain following a dry season should receive particular attention from mining enterprises and regulators. Several mitigation options and recommendations are also discussed.
MeSH term(s)	China ; Environmental Monitoring ; Geologic Sediments ; Metals, Heavy/analysis ; Risk Assessment ; Rivers ; Seasons ; Water Pollutants, Chemical/analysis
Chemical Substances	Metals, Heavy ; Water Pollutants, Chemical
Language	English
Publishing date	2021-07-02
Publishing country	United States
Document type	Journal Article
ZDB-ID	185986-9
ISSN	1432-0703 ; 0090-4341
ISSN (online)	1432-0703
ISSN	0090-4341
DOI	10.1007/s00244-021-00870-y
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

In stock of ZB MED Cologne/Königswinter

Zs.A 1182: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾

Article: Heavy Rainfall Events Following the Dry Season Elevate Metal Contamination in Mining-Impacted Rivers: A Case Study of Wenyu River, Qinling, China

Chen, Dong / Chen, Yi-ping / Lin, Yishan

Archives of environmental contamination and toxicology. 2021 Aug., v. 81, no. 2

2021

Abstract: Heavy metal pollution of a mining-impacted river—the Wenyu River—and a short section of the river ... the following: (1) The Wenyu River was severely polluted by acid mine drainage from an open-pit molybdenum (Mo ... an increasing tendency along the Wenyu River and Luo River. (3) The heavy rainfall following the prolonged ...

Abstract	Heavy metal pollution of a mining-impacted river—the Wenyu River—and a short section of the river it joins, the Luo River, were investigated after heavy rainfall following a dry season in March 2015 and during a normal flow season in May 2015. Water samples were collected during these two periods, and sediment samples were obtained in May as the rain washed out the sediments in March. The results showed the following: (1) The Wenyu River was severely polluted by acid mine drainage from an open-pit molybdenum (Mo) mine, and the major pollutants in the water according to Chinese national standard values were acid (pH), sulfate, Cu, Zn, Mn, Ni, and Cd. The major pollutants in the sediment were Cu, Zn, and Cd, as indicated by the geoaccumulation index and potential ecological risk index. (2) The major pollutants in the water were naturally attenuated along the river and met the national standard values after joining the Luo River, except Mn in both water samples and Cd in the samples after rain in March. The major pollutants in the sediments showed an increasing tendency along the Wenyu River and Luo River. (3) The heavy rainfall following the prolonged dry season increased acid and heavy metal contamination in the river, which might be attributed to the dissolution of efflorescent salts and the weathering and erosion of mining residues. Thus, the first heavy rain following a dry season should receive particular attention from mining enterprises and regulators. Several mitigation options and recommendations are also discussed.
Keywords	acid mine drainage ; case studies ; dry season ; heavy metals ; molybdenum ; pH ; pollution ; rain ; risk ; rivers ; sediments ; sulfates ; toxicology ; China
Language	English
Dates of publication	2021-08
Size	p. 335-345.
Publishing place	Springer US
Document type	Article
ZDB-ID	185986-9
ISSN	1432-0703 ; 0090-4341
ISSN (online)	1432-0703
ISSN	0090-4341
DOI	10.1007/s00244-021-00870-y
Database	NAL-Catalogue (AGRICOLA)

In stock of ZB MED Bonn / Germany

Z 7585: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

Article: Effects of riparian vegetation patterns on the distribution and potential loss of soil nutrients: a case study of the Wenyu River in Beijing

Guo, Erhui / Chen, Liding / Sun, Ranhao / Wang, Zhaoming

Frontiers of environmental science & engineering

2015 Volume 9, Issue 2, Page(s) 279

Language	English
Document type	Article
ZDB-ID	2662203-8
ISSN	2095-2201
Database	Current Contents Nutrition, Environment, Agriculture

In stock of ZB MED Bonn / Germany

Z 7938: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Water quantity and quality optimization modeling of dams operation based on SWAT in Wenyu River Catchment, China.

Zhang, Yongyong / Xia, Jun / Chen, Junfeng / Zhang, Minghua

Environmental monitoring and assessment

2011 Volume 173, Issue 1-4, Page(s) 409–430

Abstract: ... at the basin scale. Wenyu River Catchment, a key area in Beijing, was selected as the case study. Results ... showed that the coupled water quantity and quality model of Wenyu River Catchment more realistically ... provides the foundation for research of water quantity and quality optimization on dam operation in Wenyu ...

Abstract	Water quantity and quality joint operation is a new mode in the present dams' operation research. It has become a hot topic in governmental efforts toward integrated basin improvement. This paper coupled a water quantity and quality joint operation model (QCmode) and genetic algorithm with Soil and Water Assessment Tool (SWAT). Together, these tools were used to explore a reasonable operation of dams and floodgates at the basin scale. Wenyu River Catchment, a key area in Beijing, was selected as the case study. Results showed that the coupled water quantity and quality model of Wenyu River Catchment more realistically simulates the process of water quantity and quality control by dams and floodgates. This integrated model provides the foundation for research of water quantity and quality optimization on dam operation in Wenyu River Catchment. The results of this modeling also suggest that current water quality of Wenyu River will improve following the implementation of the optimized operation of the main dams and floodgates. By pollution control and water quantity and quality joint operation of dams and floodgates, water quality of Wenyu river will change significantly, and the available water resources will increase by 134%, 32%, 17%, and 82% at the downstream sites of Sha River Reservoir, Lutong Floodgate, Xinpu Floodgate, and Weigou Floodgate, respectively. The water quantity and quality joint operation of dams will play an active role in improving water quality and water use efficiency in Wenyu River Basin. The research will provide the technical support for water pollution control and ecological restoration in Wenyu River Catchment and could be applied to other basins with large number of dams. Its application to the Wenyu River Catchment has a great significance for the sustainable economic development of Beijing City.
MeSH term(s)	China ; Environmental Monitoring/methods ; Rivers ; Water/analysis
Chemical Substances	Water (059QF0KO0R)
Language	English
Publishing date	2011-02
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	782621-7
ISSN	1573-2959 ; 0167-6369
ISSN (online)	1573-2959
ISSN	0167-6369
DOI	10.1007/s10661-010-1396-5
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

In stock of ZB MED Bonn / Germany

Z 5186: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾

Article: [Analysis of seasonal variations of surface water quality in the middle and upper reaches of Wenyu River].

Yang, Li-Rong / Sun, Ran-Hao / Chen, Li-Ding

Huan jing ke xue= Huanjing kexue

2011 Volume 32, Issue 1, Page(s) 73–79

Abstract: The middle and upper reaches of Wenyu River was chosen as a case study area, and the temp-spatial ... pattern. However, in the piedmont plains of Wenyu River middle reaches, TN, TP, PO4(3)-P and COD ... to middle reaches of Wenyu river, self-purification capacity of surface water is reduced with its nutrient ...

Abstract	The middle and upper reaches of Wenyu River was chosen as a case study area, and the temp-spatial difference of surface water quality was systematically studied by water sampling from June to August of 2009. It was found that distinct seasonal variations was exhibited on surface water quality in the study area. In the mountain regions, TP, TN, NO3(-)-N, NH4(+) -N and TOC concentration in the water increase from June to July, and then decline remarkably, whereas the DO and COD concentration in the water display an opposite pattern. However, in the piedmont plains of Wenyu River middle reaches, TN, TP, PO4(3)-P and COD concentration decrease sharply from June to July and then increase substantially in August, while DO concentration shows a decline tendency from June to August. Furthermore, from the upper stream mountains to middle reaches of Wenyu river, self-purification capacity of surface water is reduced with its nutrient pollution aggravates, and the water pollution process and its formation mechanism are different. Altogether, the process of water pollution in the mountainous areas has a pulse pollution process in the rainy season, and the surface run-off in the rainy season may aggravate the pollution process by bring a large volume of non-point source pollutants into surface water from the land. Because of various types of pollution sources in the piedmont regions, the water pollution processes are unstable and peak surface run-offs in the rainy season may dilute the surface water pollutions. The results provide a scientific basis for ecological function regionalization.
MeSH term(s)	China ; Environmental Monitoring ; Rivers/chemistry ; Seasons ; Water Pollution/analysis
Language	Chinese
Publishing date	2011-01
Publishing country	China
Document type	English Abstract ; Journal Article ; Research Support, Non-U.S. Gov't
ISSN	0250-3301
ISSN	0250-3301
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article: Effects of riparian vegetation patterns on the distribution and potential loss of soil nutrients: a case study of the Wenyu River in Beijing

Guo, Erhui / Chen, Liding / Sun, Ranhao / Wang, Zhaoming

Frontiers of environmental science & engineering. 2015 Apr., v. 9, no. 2

2015

Abstract: ... The types of riparian vegetation have changed greatly because of human activities along the Wenyu River ...

Abstract	A riparian ecosystem is an ecological transition zone between a river channel and terrestrial ecosystems. Riparian ecosystems play a vital role in maintaining stream health and bank stabilization. The types of riparian vegetation have changed greatly because of human activities along the Wenyu River. This study examines the impact of riparian vegetation patterns on water pollution due to soil nutrient loss. Four riparian vegetation patterns from the river channel to the upland were chosen as the focus of this study: grassland, cropland, grassland-cropland, and grassland-manmade lawn. The different distributions of soil nutrients along vegetation patterns and the potential risk of nutrient loss were observed and compared. The results showed that riparian cropland has the lowest value of total nitrogen (TN), total phosphorus (TP), available nitrogen (AN), available phosphorus (AP), and organic matter (OM), but it has the highest soil bulk density (BD). The distributions of soil TN, TP, AN, AP, and OM exhibited a declining trend from the upland toward the river channel for riparian cropland, whereas a different trend was observed for the riparian grassland. The vegetation patterns of grassland-cropland and grassland-manmade lawn show that the grassland in the lower slope has more nutrients and OM but lower soil BD than the cropland or manmade lawn in the upper slope. So, the lower-slope grassland may intercept and infiltrate surface runoff from the upland. The lower-slope grassland has higher levels of soil TN, TP, AN, and AP, and thus it may become a new source of nutrient loss. Our results suggest that the management of the riparian vegetation should be improved, particularly in densely populated areas, to control soil erosion and river pollution.
Keywords	case studies ; cropland ; grasslands ; highlands ; humans ; lawns and turf ; nitrogen ; nitrogen content ; nutrients ; organic matter ; phosphorus ; risk ; rivers ; runoff ; soil density ; soil erosion ; soil nutrients ; streams ; terrestrial ecosystems ; water pollution ; China
Language	English
Dates of publication	2015-04
Size	p. 279-287.
Publishing place	Springer-Verlag
Document type	Article
ZDB-ID	2662203-8
ISSN	2095-221X ; 2095-2201
ISSN (online)	2095-221X
ISSN	2095-2201
DOI	10.1007/s11783-014-0667-8
Database	NAL-Catalogue (AGRICOLA)

In stock of ZB MED Bonn / Germany

Z 7938: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

Article: Uprising period and elevation of the Wenyu granitic pluton in the Xiaoqinling District, Central China

Yu, XinQi / Liu, JunLai / Zhang, DeHui / Zheng, Yong / Li, ChunLin / Chen, ShuaiQi / Li, Tan

Chinese science bulletin Kexue tongbao.. 2013 Dec., v. 58, no. 35

2013

Abstract: ... with regard to gold deposits. The uprising period of the Wenyu granitic pluton and the wall-rocks ... exploration. Fission-track (FT) analysis of zircons and apatites of granitic rocks from the Wenyu granitic ... and Wenyu gold deposits. The ³⁹Ar/⁴⁰Ar dating of sericite from the fault planes of the Xunmadao-Xiaohe ...

Abstract	Xiaoqinling District is an important gold-producing area in China. It ranks second to Jiaodong with regard to gold deposits. The uprising period of the Wenyu granitic pluton and the wall-rocks of the deposit, as well as the mineralizing depth and reserved place of gold ore bodies, are significant to ore exploration. Fission-track (FT) analysis of zircons and apatites of granitic rocks from the Wenyu granitic pluton shows that apatite FT (AFT) data modeling indicates a rapid cooling rate of 20°C/Ma from 138 to 120 Ma after emplacement at 138 Ma. Thermal evolution and inversion curves suggest a secondary phase of fast cooling and uprising from 45 to 35 Ma, and 35 Ma, respectively, with a cooling rate of 6.7°C/Ma and a denudation quantity of ∼4.3 km. The last cooling phase took place from <4 Ma, with an average cooling rate of ∼11.3°C/Ma and a denudation amount of 1.3 km. Total exhumation quantity of 5.6 km and uprising elevation of 7.3 km are similar to the estimated results of fluid inclusions from the Dongtongyu and Wenyu gold deposits. The ³⁹Ar/⁴⁰Ar dating of sericite from the fault planes of the Xunmadao-Xiaohe and Taiyao faults demonstrate two uprising activities of the ore-host metamorphic complex. The Huashan and Wenyu granitic plutons intensively occurred during 77 and 45 Ma, respectively. These data sets are valuable for understanding the uplifting process and for preserving gold ore bodies in the Xiaoqinling area, as well as for further studies on tectonic evolutions of the Taihua Complex and the Qinling-Dabie Orogen.
Keywords	apatite ; data collection ; gold ; models ; rocks ; China
Language	English
Dates of publication	2013-12
Size	p. 4459-4471.
Publishing place	Springer-Verlag
Document type	Article
ZDB-ID	1021576-1
ISSN	1861-9541 ; 1001-6538 ; 0250-7862
ISSN (online)	1861-9541
ISSN	1001-6538 ; 0250-7862
DOI	10.1007/s11434-013-5830-2
Database	NAL-Catalogue (AGRICOLA)

In stock of ZB MED Bonn / Germany

Einzelsignatur: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

Article: Water quantity and quality optimization modeling of dams operation based on SWAT in Wenyu River Catchment, China

Zhang, Y. / Xia, J. / Chen, J. / Zhang, M.

Environmental monitoring and assessment

2011 Volume 173, Issue 1/4, Page(s) 409

Language	English
Document type	Article
ZDB-ID	782621-7
ISSN	0167-6369
Database	Current Contents Nutrition, Environment, Agriculture

In stock of ZB MED Bonn / Germany

Z 5186: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

Article: Water quantity and quality optimization modeling of dams operation based on SWAT in Wenyu River Catchment, China

Zhang, Yongyong / Xia, Jun / Chen, Junfeng / Zhang, Minghua

Environmental monitoring and assessment. 2011 Feb., v. 173, no. 1-4

2011

Abstract	Water quantity and quality joint operation is a new mode in the present dams' operation research. It has become a hot topic in governmental efforts toward integrated basin improvement. This paper coupled a water quantity and quality joint operation model (QCmode) and genetic algorithm with Soil and Water Assessment Tool (SWAT). Together, these tools were used to explore a reasonable operation of dams and floodgates at the basin scale. Wenyu River Catchment, a key area in Beijing, was selected as the case study. Results showed that the coupled water quantity and quality model of Wenyu River Catchment more realistically simulates the process of water quantity and quality control by dams and floodgates. This integrated model provides the foundation for research of water quantity and quality optimization on dam operation in Wenyu River Catchment. The results of this modeling also suggest that current water quality of Wenyu River will improve following the implementation of the optimized operation of the main dams and floodgates. By pollution control and water quantity and quality joint operation of dams and floodgates, water quality of Wenyu river will change significantly, and the available water resources will increase by 134%, 32%, 17%, and 82% at the downstream sites of Sha River Reservoir, Lutong Floodgate, Xinpu Floodgate, and Weigou Floodgate, respectively. The water quantity and quality joint operation of dams will play an active role in improving water quality and water use efficiency in Wenyu River Basin. The research will provide the technical support for water pollution control and ecological restoration in Wenyu River Catchment and could be applied to other basins with large number of dams. Its application to the Wenyu River Catchment has a great significance for the sustainable economic development of Beijing City.
Keywords	basins ; case studies ; ecological restoration ; hydrologic models ; operations research ; pollution control ; quality control ; rivers ; soil water ; sustainable development ; water currents ; water pollution ; water quality ; water reservoirs ; water use efficiency ; watersheds ; China
Language	English
Dates of publication	2011-02
Size	p. 409-430.
Publisher	Springer Netherlands
Publishing place	Dordrecht
Document type	Article
ZDB-ID	782621-7
ISSN	1573-2959 ; 0167-6369
ISSN (online)	1573-2959
ISSN	0167-6369
DOI	10.1007/s10661-010-1396-5
Database	NAL-Catalogue (AGRICOLA)

In stock of ZB MED Bonn / Germany

Z 5186: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

To top

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

Full text online

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

Full text online

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED