Particle size distributions in waters from a karstic aquifer: from particles to colloids

Atteia, Olivier; Kozel, Ronald

doi:10.1016/s0022-1694(97)00033-4

Cited by 82 publications

(45 citation statements)

References 19 publications

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“…Because colloidal suspensions may evolve after collection, only those particles with a diameter (dp) Ͼ log 2 mm were included in the statistical analysis. Although Atteia and Kozel (1997) found a good fit with a two-part power law model, we found a cubic equation to be a better fit for our data, yielding a minimum regression coefficient (r 2 ) of 0.96 and in most cases Ͼ 0.99 (data not shown). The cubic model was used to calculate three representative parameters for each data set: the values of the PSDF at 4 and 10 mm (N 4mm and N 10mm ) and d max , defined as the dp for which only 10 particles were counted.…”

mentioning

confidence: 62%

“…While the 6-12 h sampling interval used by Atteia and Kozel (1997) gives a rough description of spring response, the 1-h sampling interval used for this study results in a smooth curve describing changes in the PSDF. We obtained a better fit to the PSDF by applying a cubic equation than by applying the two-part power law employed by Atteia and Kozel (1997), however we do not suggest that the cubic equation implies any particular physical process.…”

Section: Temporal Changes In Mineralogy and Psdfmentioning

confidence: 99%

“…Ryan and Meiman (1996) investigated temporal variations in nonpoint source pollutants in spring flow, but their description of mobile particulates was limited to determination of total suspended solids (TSS) concentrations. Atteia and Kozel (1997) describe differences in particle size distributions at two karst springs, identifying both colloidal and larger size particle populations, and discuss the potential importance of colloidmediated contaminant transport in karst.…”

Section: Introductionmentioning

confidence: 99%

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Muddy waters: temporal variation in sediment discharging from a karst spring

Mahler

Lynch

1999

Journal of Hydrology

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Karst aquifers are capable of transporting and discharging large quantities of suspended sediment, which can have an important impact on water quality. Here we present the results of intensive monitoring of sediment discharging from a karst spring in response to two storm events, one following a wet season and the other following a dry season; we describe temporal changes in total suspended solids (TSS), mineralogy, and particle size distribution. Peak concentrations of suspended sediment coincided with changes in aqueous chemistry indicating arrival of surface water, suggesting that much of the discharging sediment had an allochthonous origin. Concentrations of suspended sediment peaked 14-16 h after rainfall, and the bulk of the sediment (approximately 1 metric ton in response to each storm) discharged within 24 h after rainfall. Filtered material included brightly colored fibers and organic matter. Suspended sediments consisted of dolomite, calcite, quartz, and clay. Proportions of each mineral constituent changed as the aquifer response to the storm progressed, indicating varying input from different sediment sources. The hydraulic response of the aquifer to precipitation was well described by changes in parameters obtained from the particle size distribution function, and corresponded to changes seen in TSS and mineralogy. Differences between storms in the quantity and mineralogy of sediment transported suggest that seasonal effects on surface sediment supply may be important. The quantity of sediment discharging and its potential to sorb and transport contaminants indicates that a mobile solid phase should be included in contaminant monitoring and contaminant transport models of karst. Temporal changes in sediment quantity and characteristics and differences between responses to the two storms, however, demonstrate that the process is not easily generalized. ᭧

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mentioning

confidence: 62%

Section: Temporal Changes In Mineralogy and Psdfmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Muddy waters: temporal variation in sediment discharging from a karst spring

Mahler

Lynch

1999

Journal of Hydrology

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“…Atteia and coworkers studied the size distribution and chemical-mineralogical composition of colloids and particles from a sinking stream and a connected karst spring (17,18). PSD curves at the spring were composed of two Continuous monitoring of particle-size distribution (PSD), total organic carbon (TOC), turbidity, discharge and physicochemical parameters, together with analyses of fecal indicator bacteria, particularly Escherichia coli, made it possible to better understand the processes governing pathogen transport in karst groundwater and to establish PSD as indicator for possible microbial contamination of drinking water from karst springs.…”

mentioning

confidence: 99%

Particle-Size Distribution As Indicator for Fecal Bacteria Contamination of Drinking Water from Karst Springs

Pronk

Goldscheider

Zopfi

2007

Environ. Sci. Technol.

129

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Continuous monitoring of particle-size distribution (PSD), total organic carbon (TOC), turbidity, discharge and physicochemical parameters, together with analyses of fecal indicator bacteria, particularly Escherichia coli, made it possible to better understand the processes governing pathogen transport in karst groundwater and to establish PSD as indicator for possible microbial contamination of drinking water from karst springs. In the study area near Yverdon-les-Bains, Switzerland, tracer tests proved connection between a sinking stream draining agricultural land and several springs, 4.8–6.3 km away. Tracing and monitoring results demonstrate that (i) suspended particles (turbidity) in the spring water either originate from remobilization of sediments inside the aquifer (autochthonous) or from the sinking stream and land surface (allochthonous); (ii) allochthonous turbidity coincides with increased E. coli and TOC levels; (iii) PSD makes it possible to distinguish the two types of turbidity; (iv) a relative increase of finer particles (0.9–10 µm) indicates allochthonous turbidity and thus possible fecal contamination. The method permits to optimize water treatment and identify periods when the spring water must be rejected. Findings from other test sites confirm the feasibility of this approach.

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“…Both particle size (Atteia and Kozel, 1997) and mineralogy (Mahler and Lynch, 1999) can change over the course of a storm. Studies have identified sediments transported from the surface during storms (Ryan and Meiman, 1996) and due to re-suspension of sediments already in the system (Herman et al, 2008;Marshall et al, 1998;Pronk et al, 2006).…”

Section: Sediment Transportmentioning

confidence: 99%

Frontiers of Karst Research: Proceedings and recommendations of the workshop held in San Antonio, Texas on 3-5 May 2007. Karst Waters Institute Special Publication 13

White¹,

Martin²

2009

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information.Send comments regarding this burden estimate or any other aspect of this collection of information, including suggesstions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA, 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any oenalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. a. REPORT Frontiers of Karst Research Karst Waters Institute Special Publication 1314. ABSTRACT SECURITY CLASSIFICATION OF:This project was a Workshop, held in San Antonio, Texas, May 3-5, 2007. The objective of the workshop was to assess the current state of knowledge of karst aquifers, caves, and the broader scientific values that could be derived from their study. The term "karst" is used to describe landscapes underlain by soluble rocks and as a result has developed landforms such as sinkholes, sinking streams, and caves. Such landscapes have special environmental hazards such as contaminated water supplies, sinkhole collapses, and other land instability. The caves that underlie such landscapes offer special opportunities for studies of biodiversity and species evolution in cave organisms. Cave deposits are being rapidly developed as archives U REPORT DATE (DD-MM-YYYY) TITLE AND SUBTITLE 08-01-200913. SUPPLEMENTARY NOTES The views, opinions and/or findings contained in this report are those of the author(s) and should not contrued as an official Department of the Army position, policy or decision, unless so designated by other documentation. Frontiers of Karst Research Karst Waters Institute Special Publication 13Report Title ABSTRACTThis project was a Workshop, held in San Antonio, Texas, May 3-5, 2007. The objective of the workshop was to assess the current state of knowledge of karst aquifers, caves, and the broader scientific values that could be derived from their study. The term "karst" is used to describe landscapes underlain by soluble rocks and as a result has developed landforms such as sinkholes, sinking streams, and caves. Such landscapes have special environmental hazards such as contaminated water supplies, sinkhole collapses, and other land instability. The caves that underlie such landscapes offer special opportunities for studies of biodiversity and species evolution in cave organisms. Cave deposits are being rapidly developed as archives for paleoclimatic information that extends from the present back into the ice ages. The description of ground water flow and contaminant transport in karst aquifers require advanced method...

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Particle size distributions in waters from a karstic aquifer: from particles to colloids

Cited by 82 publications

References 19 publications

Muddy waters: temporal variation in sediment discharging from a karst spring

Muddy waters: temporal variation in sediment discharging from a karst spring

Particle-Size Distribution As Indicator for Fecal Bacteria Contamination of Drinking Water from Karst Springs

Frontiers of Karst Research: Proceedings and recommendations of the workshop held in San Antonio, Texas on 3-5 May 2007. Karst Waters Institute Special Publication 13

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