Application of a risk management framework to a drinking water supply augmented by stormwater recharge

2011 ◽  
Vol 63 (4) ◽  
pp. 719-726 ◽  
Author(s):  
J. L. Vanderzalm ◽  
D. W. Page ◽  
P. J. Dillon
Keyword(s):  
Risk Management ◽  
Drinking Water ◽  
Water Supply ◽  
Drinking Water Supply ◽  
Organic Chemical ◽  
Supply Source ◽  
Management Framework ◽  
Chemical Hazards ◽  
Risk Management Framework ◽  
Blue Lake

The Blue Lake is an important water resource for the city of Mount Gambier and the surrounding region, primarily as the drinking water supply source, but also as a tourist attraction. Mount Gambier’s stormwater is discharged directly via drainage wells into the unconfined, karstic Gambier Limestone aquifer, which in turn provides the majority of recharge to Blue Lake. Discharge of urban runoff to the aquifer commenced in the 1800s as a means of stormwater management, but is now recognised as contributing to the drinking water supply in Blue Lake. Recently, guidelines for managing the risks associated with water recycling and augmenting drinking water supplies have been developed. This paper examines the organic chemical hazards associated with a stormwater to potable recycling scheme as an example of the current risk management framework.

Using elemental profiles in the sediment of a lake used to supply drinking water to understand the impacts of urban stormwater recharge

2013 ◽  
Vol 64 (6) ◽  
pp. 493 ◽  
Author(s):  
J. L. Vanderzalm ◽  
P. J. Dillon ◽  
G. J. Hancock ◽  
C. Leslie ◽  
J. Dighton ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
South Australia ◽  
Fold Increase ◽  
Drinking Water Supply ◽  
Calcite Precipitation ◽  
Blue Lake ◽  
Lake Bottom ◽  
Lake Floor ◽  
Negative Impacts

The regional city of Mount Gambier, South Australia, recharges stormwater directly into the underlying unconfined, karstic Gambier Limestone aquifer. This aquifer provides the majority of recharge to Blue Lake, a groundwater-fed volcanic crater lake, used for Mount Gambier’s drinking water supply. However, concern remains regarding the risk posed by contaminants within stormwater, in particular when stormwater recharge may ultimately contribute to a source of drinking-water supply. The present research examined the role of the annual calcite precipitation in the lake, in protecting the quality of its water supply, by examining the composition of particulate matter in the lake and on the lake bottom. The sediment did not reveal negative impacts of stormwater recharge, but did highlight the increase in erosion as a result of settlement and extensive land clearing for agriculture at the time of settlement. Analysis of lake-floor sediment revealed increased accumulation of the lithogenic elements within the lake-floor sediment during this interval, owing to the cleansing capacity of the calcite precipitation cycle. Extraction of water from Blue Lake for water supply has resulted in a reduced water residence time in the lake and a three-fold increase in the accumulation of calcium carbonate on the lake floor.

scholarly journals Cyanotoxins in drinking water supply reservoir (Legedadi, Central Ethiopia): implications for public health safety

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Hanna Habtemariam ◽  
Demeke Kifle ◽  
Seyoum Leta ◽  
Wendy Beekman ◽  
Miquel Lürling
Keyword(s):  
Public Health ◽  
Drinking Water ◽  
Water Supply ◽  
Algal Bloom ◽  
Addis Ababa ◽  
Capital City ◽  
Drinking Water Supply ◽  
Cyanobacterial Blooms ◽  
Drinking Water Source ◽  
Supply Source

AbstractCyanobacterial blooms in drinking water supply affect its quality, which ultimately impacts ecosystem and public health. Thus, this cross-sectional study was conducted to perform a preliminary study on cyanotoxins via analysis of samples collected only once from two sites during the month of peak algal bloom and to subsequently prompt a comprehensive risk assessment in a major drinking water source, Legedadi Reservoir, of Addis Ababa, the capital city of Ethiopia. Samples were collected during peak algal bloom month (January 2018) from two sampling sites, near the dam (S1) and at the center of the reservoir (S2). Identification and enumeration of phytoplankton taxa were done and the measurement of common hepatotoxin (MCs and NOD) concentrations was conducted using liquid chromatography-tandem mass spectrometry. In the reservoir, cyanobacteria made up to 98% of total phytoplankton abundance, with Dolichospermum and Microcystis spp, dominating the phytoplankton community. In these first cyanotoxin analyses conducted for a drinking water supply source in Ethiopia, six major MC variants, namely MC-dmRR, MC-RR, MC-YR, MC-dmLR, MC-LR, and MC-LA, were detected in both algal seston and water samples. MC-LR was the most dominant MCs variant, while nodularin was not detected for both sampling sites. Extracellular total MC concentrations (μg L−1) of 453.89 and 61.63 and intracellular total MC concentrations (μg L−1) of 189.29 and 112.34 were recorded for samples from S1 and S2, respectively. The high concentrations of extracellular MCs, with MC-LR constituting the greatest proportion, indicate the extremely high potential public health risk for end-users.

Quality and suitability of harvested rainwater for drinking in Bangladesh

2010 ◽  
Vol 10 (3) ◽  
pp. 359-366 ◽  
Author(s):  
Md. Rezaul Karim
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Rainwater Harvesting ◽  
Quality Parameters ◽  
Drinking Water Supply ◽  
Supply Source ◽  
Drinking Water Standard ◽  
Guideline Values ◽  
Harvesting Systems ◽  
Who Guideline

Several programs have been undertaken during the last few years to install rooftop rainwater harvesting systems as an alternative drinking water supply source both in the coastal and arsenic affected areas in Bangladesh. In this study, quality of the harvested rainwater used for drinking water supply was assessed. A total of 308 harvested rainwater samples were collected from the different storage reservoirs located both in coastal and arsenic affected areas and analysed for various physical, chemical and microbial indicators. Most of the physical and chemical water quality parameters were well below the Bangladesh Drinking Water Standard and WHO guideline values. However, the harvested rainwater was found microbiologically contaminated to some extent and the water is not suitable for consumption without treatment. For safe and sustainable rainwater harvesting, WHO guideline and water safely plan (WSP) can be adopted in Bangladesh.

Developing and implementing the risk management framework into business processes of Gazprom transgaz Tomsk Ltd., for implementation of the Eastern gas program of PJSC Gazprom

2020 ◽  
Vol 17 (1) ◽  
pp. 68-77
Author(s):  
V. E. Zaikovsky ◽  
A. V. Karev
Keyword(s):  
Risk Management ◽  
Human Resources ◽  
Management Information System ◽  
Business Processes ◽  
Project Success ◽  
Management Information ◽  
Timely Manner ◽  
Project Approach ◽  
Management Framework ◽  
Risk Management Framework

Project success depends on the ability to respond to risks and make correct decisions in a timely manner. The project approach provides a better framework for implementing a new management system into the company’s business processes. The risk management framework developed by the company comprises a risk management infrastructure, a set of standards, human resources, and a risk management information system. To improve staff compliance, it is necessary to provide training and to communicate the goals of the project effectively. It is also important to develop a motivation system because well trained and motivated staff are able to work more efficiently.

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