Natural uranium and strontium isotope tracers of water sources and surface water–groundwater interactions in arid wetlands – Pahranagat Valley, Nevada, USA

2014 ◽  
Vol 517 ◽  
pp. 213-225 ◽  
Author(s):  
James B. Paces ◽  
Frederic C. Wurster
2014 ◽  
Vol 12 (3) ◽  
pp. 484-491 ◽  
Author(s):  
Andrea Crampton ◽  
Angela T. Ragusa

Agricultural runoff into surface water is a problem in Australia, as it is in arguably all agriculturally active countries. While farm practices and resource management measures are employed to reduce downstream effects, they are often either technically insufficient or practically unsustainable. Therefore, consumers may still be exposed to agrichemicals whenever they turn on the tap. For rural residents surrounded by agriculture, the link between agriculture and water quality is easy to make and thus informed decisions about water consumption are possible. Urban residents, however, are removed from agricultural activity and indeed drinking water sources. Urban and rural residents were interviewed to identify perceptions of agriculture's impact on drinking water. Rural residents thought agriculture could impact their water quality and, in many cases, actively avoided it, often preferring tank to surface water sources. Urban residents generally did not perceive agriculture to pose health risks to their drinking water. Although there are more agricultural contaminants recognised in the latest Australian Drinking Water Guidelines than previously, we argue this is insufficient to enhance consumer protection. Health authorities may better serve the public by improving their proactivity and providing communities and water utilities with the capacity to effectively monitor and address agricultural runoff.


1988 ◽  
Vol 20 (11-12) ◽  
pp. 5-10 ◽  
Author(s):  
J. S. Colbourne ◽  
P. J. Dennis ◽  
R. M. Trew ◽  
C. Berry ◽  
G. Vesey

A survey for legionella in public water supplies in England failed to detect culturable L.pneumophila in all but samples from taps in buildings; however, the organism was detected in underground and surface water sources and distribution systems using an indirect immunofluorescent assay (IFA) to L.pneumophila serogroup 1. Culturability was related to water temperatures above 20°C. In water mains L.pneumophila was associated with biofilms or sediment. Non-culturable L.pneumophila detected in potable waters by IFA were recovered by heat shock experiments demonstrating their viability. Although the strain found in potable water is rarely asociated with disease, monoclonal expression, a virulence marker, was altered by heat shock. These findings have implications for the prevention of legionellosis and may explain the sporadic nature of legionnaires disease in the community.


2017 ◽  
Vol 31 (10) ◽  
pp. 1913-1925 ◽  
Author(s):  
Lydia B. Nickolas ◽  
Catalina Segura ◽  
J. Renée Brooks
Keyword(s):  

2014 ◽  
Vol 6 (4) ◽  
pp. 221-231 ◽  
Author(s):  
N. M. Kiulia ◽  
J. Mans ◽  
J. M. Mwenda ◽  
M. B. Taylor

2019 ◽  
Vol 14 (4) ◽  
pp. 851-862
Author(s):  
Herong Gui ◽  
Rongjie Hu ◽  
Honghai Zhao ◽  
Jun Li ◽  
Xiaomei Song ◽  
...  

Abstract Among all recorded water disasters in China coalmines, 10% can be attributed to surface water, making it one of the top water hazards. Based on the analysis of cases of surface water hazards in China coalmines, this article determined surface water sources and inrush conduits as the major factors that have caused water inrush disasters in mines, and classified surface water hazards in China coalmines into 15 types according to those major factors and gave definitions of each type of surface water hazard. Then, it is proposed that there are different types of surface water hazards in different coal-bearing regions by analyzing the relationship to terrain features, climatic impact and mining conditions. Finally, we discuss how typical water sources and inrush conduits work together in hazard formation, in addition to the characteristics and corresponding preventative technologies. The propositions can be of reference for exchanges with other mining countries and regions on surface water hazard treatment.


2003 ◽  
Author(s):  
Thomas F. Scherer ◽  
Lowell A. Disrud ◽  
Ryan M. Waters
Keyword(s):  

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