The relationship between musty-odor-causing organisms and water quality inv Lake Biwa

Musty odor has occurred annually in Lake Biwa since 1969. Osaka municipal waterworks, which is located downstream of Lake Biwa, has made many efforts to treat musty-odor compounds produced in Lake Biwa from spring through autumn. With the development of analytical methods for the determination of musty-odor compounds, we have been able to confirm that planktonic blue-green algae are the major causes of the musty-odor occurrences. The relationship between the growth of blue-green algae and the water quality was not so apparent. However, through our data analysis focusing on the relationship between musty-odor occurrences due to Phormidium tenue or Oscillatoria tenuis and some nutrients in Lake Biwa, we found that the concentration of nitrate in water may be an important parameter for the estimation of growth of the algae and the musty-odor behavior.

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The Relationship between Concentration and Sensory Properties of 2-Methylisoborneol and Geosmin in Drinking Water

Water Science & Technology ◽

10.2166/wst.1988.0218 ◽

1988 ◽

Vol 20 (8-9) ◽

pp. 11-17 ◽

Cited By ~ 4

Author(s):

T. Ito ◽

T. Okumura ◽

M. Yamamoto

Keyword(s):

Drinking Water ◽

Water Temperature ◽

Forced Choice ◽

Residual Chlorine ◽

Mixing Ratio ◽

Consumer Panel ◽

Triangle Method ◽

Musty Odor ◽

The Relationship ◽

Mixed Samples

The study of the relations between the senses of smell and taste and odorant concentration is important for the solution of odor problems. The threshold concentrations of odor and taste (TOC, TTC) of 2-methylisoborneol (MIB) and geosmin were measured by the non-forced choice triangle method using 12-20 panelists. Both TOC and TTC were found to be functions of water temperature and the concentration of residual chlorine. The TOC and TTC of mixed samples were rather lower than the concentrations calculated from the mixing ratio. The sensitivities of the consumer panel and the number of musty odor complaints from consumers are related to MIB or geosmin concentration. The ratio of the number of complaints to MIB (or geosmin) concentration decreased after maximum complaint, but the sensitivity of the consumer panel remained the same.

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The relationship between health effects in triathletes and microbiological quality of freshwater

Water Science & Technology ◽

10.2166/wst.1995.0549 ◽

1995 ◽

Vol 31 (5-6) ◽

pp. 19-26 ◽

Cited By ~ 7

Author(s):

G. J. Medema ◽

I. A. van Asperen ◽

J. M. Klokman-Houweling ◽

A. Nooitgedagt ◽

M. J. W. van de Laar ◽

...

Keyword(s):

Water Quality ◽

Geometric Mean ◽

Microbiological Quality ◽

Quality Parameters ◽

Health Complaints ◽

E Coli ◽

Thermotolerant Coliforms ◽

Microbiological Water Quality ◽

The Relationship ◽

Faecal Streptococci

This pilot study was carried out to determine the relationship between microbiological water quality parameters and the occurrence of health complaints among triathletes. Data were collected at an Olympic distance triathlon (n=314) and a run-bike-run (n=81; controls for exposure to fresh water). At the time of the triathlon, the concentrations of Escherichia coli , thermotolerant coliforms, faecal streptococci, entero- and reoviruses, F-specific RNA phages, Salmonella, Campylobacter, Aeromonas, Plesiomonas shigelloides, Pseudomonas aeruginosa and Staphylococcus aureus were examined over the swimming course. Information on the occurrence of health complaints during the competition and in the week thereafter was collected through a written questionnaire. The results show that triathletes and run-bike-runners are comparable with respect to factors other than water exposure (age, sex, training history, physical stress, lower intestinal health complaints during the competition) that may influence the occurrence of health complaints in the week after the competition. Triathletes and run-bike-runners reported gastro-intestinal (7.7% vs 2.5%), respiratory (5.5% vs 3.7%), skin/mucosal (2.6% vs 1.2%), general (3.5% vs 1.2%) and total symptoms (14.8% vs 7.4%) in the week after the event. The health risks for triathletes for all symptom groups are not significantly higher than for run-bike-runners. The geometric mean concentration of faecal indicator bacteria is relatively low: E. coli 170/100 ml; faecal streptococci 13/100 ml, enteroviruses were present at concentrations of 0.1/l. The group of triathletes was homogeneusly and relatively intensely exposed to water; they all swam in the same body of water at the same time and 75% reported to have swallowed freshwater. It was concluded that this study design is suitable to study the relationship between health complaints and microbiological water quality. In the summers of 1993 and 1994, a study will be carried out concerning several run-bike-runs and triathlons in freshwaters of different quality.

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The effect of type of water supply on water quality in a developing community in South Africa

Water Science & Technology ◽

10.2166/wst.1997.0706 ◽

1997 ◽

Vol 35 (11-12) ◽

pp. 35-40 ◽

Cited By ~ 6

Author(s):

B. Genthe ◽

N. Strauss ◽

J. Seager ◽

C. Vundule ◽

F. Maforah ◽

...

Keyword(s):

Water Quality ◽

Water Supply ◽

Cross Sectional Study ◽

Cross Sectional ◽

E Coli ◽

Guideline Values ◽

Developing Communities ◽

Quality Guideline ◽

And Control ◽

The Relationship

Efforts to provide water to developing communities in South Africa have resulted in various types of water supplies being used. This study examined the relationship between the type of water supply and the quality of water used. Source (communal taps, private outdoor and indoor taps) and point-of-use water samples were examined for heterotrophic plate counts (HPC), total and faecal coliforms, E. coli, and coliphages. Ten percent of samples were also analysed for enteric viruses, Giardia and Cryptosporidium. Approximately 320 households were included in a case-control study. In addition, a cross-sectional study was conducted. Both studies examined the relationship between different types of water facilities and diarrhoea among pre-school children. The source water was of good microbial quality, but water quality was found to have deteriorated significantly after handling and storage in both case and control households, exceeding drinking water quality guideline values by 1-6 orders of magnitude. Coliphage counts were low for all water samples tested. Enteric viruses and Cryptosporidium oocysts were not detected. Giardia cysts were detected on one occasion in case and control in-house samples. Comparisons of whether in-house water, after handling and storage, complied with water quality guideline values demonstrated households using communal taps to have significantly poorer quality than households using private outdoor or indoor taps for HPC and E. coli (χ2 = 14.9, P = 0.001; χ2 = 6.6, P = 0.04 respectively). A similar trend (although not statistically significant) was observed for the other microbial indicators. The cross-sectional study demonstrated an apparent decrease in health risk associated with private outdoor taps in comparison to communal taps. This study suggests that a private outdoor tap is the minimum level of water supply in order to ensure the supply of safe water to developing communities.

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Assessing the Market for Poultry Litter in Georgia: Are Subsidies Needed to Protect Water Quality?

Journal of Agricultural and Applied Economics ◽

10.1017/s1074070800000079 ◽

2011 ◽

Vol 43 (4) ◽

pp. 553-568 ◽

Cited By ~ 3

Author(s):

Jeffrey Mullen ◽

Ulugbek Bekchanov ◽

Berna Karali ◽

David Kissel ◽

Mark Risse ◽

...

Keyword(s):

Water Quality ◽

Poultry Litter ◽

Focused Attention ◽

Water Protection ◽

Nutrient Loads ◽

Transportation Model ◽

Synthetic Fertilizer ◽

Protection Goals ◽

Subsidy Program ◽

The Relationship

Concerns about nutrient loads into our waters have focused attention on poultry litter applications. Like many states with a large poultry industry, Georgia recently designed a subsidy program to facilitate the transportation of poultry litter out of vulnerable watersheds. This paper uses a transportation model to examine the necessity of a poultry litter subsidy to achieve water protection goals in Georgia. We also demonstrate the relationship between diesel and synthetic fertilizer prices and the value of poultry litter. Results suggest that a well-functioning market would be able to remove excess litter from vulnerable watersheds in the absence of a subsidy.

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Effect of Maritime Traffic on Water Quality Parameters in Santa Marta, Colombia

Journal of Marine Science and Engineering ◽

10.3390/jmse9050474 ◽

2021 ◽

Vol 9 (5) ◽

pp. 474

Author(s):

René Rodríguez-Grimón ◽

Nestor Hernando Campos ◽

Ítalo Braga Castro

Keyword(s):

Water Quality ◽

Petroleum Hydrocarbons ◽

Quality Parameters ◽

Water Quality Parameters ◽

Maritime Traffic ◽

Natural Park ◽

High Concentrations ◽

The Impact ◽

The Relationship ◽

Multiple Chemical

Since 2013, there has been an increase (>23%) in naval traffic using maritime routes and ports on the coastal fringe of Santa Marta, Colombia. Of major concern, and described by several studies, is the relationship between maritime traffic and coastal contamination. This study proposed a maritime traffic indicator considering the simultaneous effects of several relevant measurements of water quality parameters to estimate the impact of naval activity. The approach involved developing a model including the number of vessels, hull length, and permanence time in berths. In addition, water quality variables, considering climatic seasons, were used to verify association with maritime traffic and touristic activities. The high concentrations of total coliforms (TC) and dissolved/dispersed petroleum hydrocarbons in chrysene equivalents (DDPH) reported by the International Marina of Santa Marta (SM) were affected by the local anthropic activities, including tourism, naval traffic, and urban wastewater discharges. Moreover, our results suggest the occurrence of multiple chemical impacts within Tayrona National Natural Park (PNNT) affecting conservation goals. The estimation of the maritime traffic indicator proposed in this study may be an easy and more complete tool for future studies evaluating the impact of naval activities on environmental quality.

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A study of the relationship between recreational use and water quality in the river.

ENVIRONMENTAL SYSTEMS RESEARCH ◽

10.2208/proer1988.20.378 ◽

1992 ◽

Vol 20 ◽

pp. 378-385 ◽

Cited By ~ 1

Author(s):

Yukihiro SHIMATANI ◽

Takashi YASUMOTI ◽

Tuneya CHIDA

Keyword(s):

Water Quality ◽

The Relationship ◽

Recreational Use

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Population structure and dynamics of the freshwater shrimp Atyaephyra desmarestii (Millet, 1831) in the lower River Minho (NW Portugal)

Crustaceana ◽

10.1163/15685403-00003442 ◽

2015 ◽

Vol 88 (6) ◽

pp. 657-673 ◽

Cited By ~ 1

Author(s):

Maria L. Fidalgo ◽

Paulo Santos ◽

Cláudia Ferreira ◽

Andreia Silva

Keyword(s):

Water Quality ◽

Reproductive Period ◽

Specific Knowledge ◽

Nw Portugal ◽

Ecological Relevance ◽

Structure And Dynamics ◽

Population Structure And Dynamics ◽

Autumn And Winter ◽

The Relationship ◽

Fast Increase

This paper reports population dynamics, growth, and reproductive features ofAtyaephyra desmarestii(Millet, 1831) from the estuary of the River Minho. Also, data were compared to information available from its distribution range. Samples were taken monthly between October 2010 and September 2011. Males were less abundant and smaller than females. The growth pattern showed hardly any increase during the autumn and winter, but a fast increase in size was recorded in spring, followed by slower growth in summer. The life span was 11-12 months. The reproductive period was from April to August, and mean fecundity reached 643 ± 254 eggs/female. Juveniles started to appear in July and a strong recruitment occurred in summer and autumn. The ecological relevance of the shrimp supports the need of obtaining further and more specific knowledge on the relationship between geographical distribution and water quality. Our results coupled with longer time series in different localities will be essential to the conservation of the species.

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