scholarly journals Impacts of Event-Based Recharge on the Vulnerability of Public Supply Wells

2021 ◽  
Vol 13 (14) ◽  
pp. 7695
Author(s):  
Andrew J. Wiebe ◽  
David L. Rudolph ◽  
Ehsan Pasha ◽  
Jacqueline M. Brook ◽  
Mike Christie ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Field Research ◽  
Extreme Rainfall ◽  
Heavy Rain ◽  
Microbial Pathogens ◽  
Public Supply ◽  
Quality Degradation ◽  
Recharge Rates ◽  
Event Based

Dynamic recharge events related to extreme rainfall or snowmelt are becoming more common due to climate change. The vulnerability of public supply wells to water quality degradation may temporarily increase during these types of events. The Walkerton, ON, Canada, tragedy (2000) highlighted the threat to human health associated with the rapid transport of microbial pathogens to public supply wells during dynamic recharge events. Field research at the Thornton (Woodstock, ON, Canada) and Mannheim West (Kitchener, ON, Canada) well fields, situated in glacial overburden aquifers, identified a potential increase in vulnerability due to event-based recharge phenomena. Ephemeral surface water flow and local ponding containing microbial pathogen indicator species were observed and monitored within the capture zones of public supply wells following heavy rain and/or snowmelt. Elevated recharge rates beneath these temporary surface water features were estimated to range between 40 and 710 mm over two-week periods using analytical and numerical modelling based on the water level, soil moisture, and temperature data. Modelling also suggested that such events could reduce contaminant travel times to a supply well, increasing vulnerability to water quality degradation. These studies suggest that event-based recharge processes occurring close to public supply wells may enhance the vulnerability of the wells to surface-sourced contaminants.

WATER QUALITY EVALUATION OF THE OBRZYCA RIVER

2017 ◽  
Vol 166 (46) ◽  
pp. 5-15
Author(s):  
Anita Jakubaszek ◽  
Sylwia Myszograj ◽  
Ewelina Płuciennik-Koropczuk ◽  
Karolina Zimna
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Quality Evaluation ◽  
Quality Standards ◽  
Human Consumption ◽  
Water Quality Evaluation ◽  
Public Supply ◽  
Chemical Indicators ◽  
Physical And Chemical

The article presents the results of the basic physical and chemical indicators of water quality in the upper and lower reaches of the river Obrzyca. Assessment of water quality is important because of located at the estuary part of the river water intake surface for Zielona Góra . The water from the initial reaches has been qualified to III class of water quality based on the achieved results. According to the Regulation of the Minister of Environment from 22 October 2014 on the classification of surface water bodies and environmental quality standards for priority substances (OJ 2014 pos. 1482), samples of water taken from Obrzyca classify this part of river to II class of quality. According to the Regulation of the Minister of Environment of 27 November 2002 on the requirements to be met by surface water used for public supply of water intended for human consumption (OJ 2002 No. 204, item. 1728), Obrzyca’s water belong to A3 category of water taken to consume by people.

scholarly journals Tabular cusum control charts of chemical variables applied to the control of surface water quality

2012 ◽  
Vol 32 (5) ◽  
pp. 951-960 ◽  
Author(s):  
Franciele A. C. Follador ◽  
Márcio A. Vilas Boas ◽  
Marlise Schoenhals ◽  
Eliane Hermes ◽  
Clovis Rech
Keyword(s):  
Water Quality ◽  
Quality Control ◽  
Surface Water ◽  
Water Samples ◽  
Control Charts ◽  
Field Research ◽  
Surface Water Quality ◽  
Small Samples ◽  
Cusum Control Charts

The aim of this study was to evaluate the application possibility of tabular CUSUM control charts in the quality control of chemical variables in surface water. It was performed bibliographic and field research to collect water samples from 2003 to 2009, totaling 30 samples, some monthly and others semi-annual in order to observe the variables that regulate water quality. It was found that these charts may be applied to control the quality of river water; showing to be effective in the perception of changes during the process, especially for small samples (n=1) which there is no repetition as in this research. It was also concluded that the Mandurim River does not presents significant levels of pollution.

scholarly journals Water Quality Degradation of Krivaja Watercourse

2015 ◽  
Vol 15 (2) ◽  
pp. 159
Author(s):  
Radovan Savić ◽  
Atila Bezdan ◽  
Jasmina Josimov-Dunđerski ◽  
Ljubomir Letić ◽  
Vesna Nikolić ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Food Production ◽  
Ecological Status ◽  
Surface Water Quality ◽  
Longitudinal Distribution ◽  
Quality Degradation ◽  
Black Spots ◽  
Rational Management ◽  
Safe Food

Based on the monthly monitoring of the relevant indicators of surface water quality during the period of analysis, from year 2006 to 2011, an unsa­tisfactory ecological status and frequent occurrence of the worst quality class was noted in the Krivaja watercourse. This situation considerably limits or prevents the use of water from this river for any purpose. Also, based on the data from the three measuring stations, the longitudinal distribution of the analyzed parameters and degradation of water quality along the Krivaja watercourse was found. Protection, revitalization and rational management of Krivaja waters as an im­portant water resource of the areas it flows through, would make this wate­rcourse deleted from the surface water quality "black spots" list. As soon as the identified problems have been overcome, apart from being a wastewater reci­pient, the Krivaja can be used for other purposes without the risk of adverse effects. Furthermore, its waters and coastline may again be attractive and usable (for the irrigation of the surrounding farmland and safe food production).

AN EVALUATION OF SUB-SURFACE WATER QUALITY AROUND BHARUCH-SURAT INDUSTRIAL REGION, GUJARAT, INDIA

2019 ◽  
Vol 38 (2) ◽  
pp. 200-220
Author(s):  
SOMNATH SAHA ◽  
◽  
SUKANTA KUMAR SAHA ◽  
TATHAGATA GHOSH ◽  
ROLEE KANCHAN ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
Industrial Region

Surface Water Quality Assessment. Case Study: Târnava Mare River, Mediaș Town-Romania

2011 ◽  
Vol 4 (5) ◽  
pp. 70-72
Author(s):  
Cristina Roşu ◽  
◽  
Ioana Piştea ◽  
Carmen Roba ◽  
Mihaela Mihu ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Quality Assessment ◽  
Surface Water Quality ◽  
Water Quality Assessment
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