Modeling sediment impact on the transport of fecal bacteria

Bai, Sen; Lung, Wu‐Seng

doi:10.1016/j.watres.2005.10.013

Cited by 178 publications

(113 citation statements)

References 28 publications

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“…As watershed size increases, so does the distance between land applied FIB sources and water monitoring points. This increased travel distance increases the opportunities for FIB losses due to sedimentation and entrapment of particle associated FIB, infiltration of runoff, and FIB decay [38][39][40][41]. A study conducted by Tian, et al [42] found that the delivery ratio of FIB to a stream increases as the distance decreases between the FIB source and the stream.…”

Section: Watershed Areamentioning

confidence: 99%

Relating Watershed Characteristics to Elevated Stream Escherichia coli Levels in Agriculturally Dominated Landscapes: An Iowa Case Study

Brendel

Soupir

2017

Water

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Fecal Indicator Bacteria (FIB) such as Escherichia coli (E. coli) are a leading cause of surface water impairments in the United States. However, the relative impacts of different watershed characteristics on microbial water quality in agriculturally dominated watersheds are unclear. Spatial and statistical analyses were utilized to examine relationships between watershed characteristics and FIB and a multiple regression model was created. Geometric mean E. coli concentration data were obtained for 395 ambient water quality monitoring locations in Iowa. Watersheds were delineated for thirty randomly selected monitoring locations and drainage areas ranged from 93 to 1.1 million hectares. Watershed characteristics examined include area, presence of animal units (open feed lots and confinements), percent of watershed area receiving manure application, presence of point-source discharges, and land cover. The results from the analyses reveal that the presence of animal feeding operations and agriculture, wetland, and woody vegetation land covers are the most influential watershed characteristics regarding E. coli concentration. A significant positive correlation was identified between E. coli concentration and agriculture while significant negative correlations were identified with animal feeding operations and wetland and woody vegetation. Establishing relationships between watershed characteristics and presence of E. coli is needed to identify dominant watershed characteristics contributing to pathogen water impairments and to prioritize remediation efforts.

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Section: Watershed Areamentioning

confidence: 99%

Relating Watershed Characteristics to Elevated Stream Escherichia coli Levels in Agriculturally Dominated Landscapes: An Iowa Case Study

Brendel

Soupir

2017

Water

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“…In order to meet the objectives of this paper, simple relations were analyzed between the temporal variability of fecal indicators concentration and some rather easily measurable regional variables regarding the present 2008-2010 monitoring period to be compared to the ones obtained earlier (2004-2005Chagas et al, 2010). The selected variables for the analysis were: mean daily temperature (°C); time since the last rainfall event (days); volume and intensity of the last rainfall event (mm day -1 ); time since the last runoff event recorded both in the Tala's river 409 km 2 basin and in a small primary 230 ha watershed that flows to this river and is directly linked to the study Sites 4 (intensive cattle management) and 7 (extensive cattle management) (days); rainfall that promoted the last runoff event in the basin and the watershed (mm); and peak discharge (m 3 s -1 ) in the basin and in the watershed.…”

Section: Climate and Hydrological Variablesmentioning

confidence: 99%

“…Efforts to study and model these complex dynamic processes in other countries were recently published (Tian et al, 2002;Bai & Lung, 2005). Many reports about microbiological contaminants show close association with stream sediments (Sherer et al, 1992;Chagas et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Biological water contamination in some cattle production fields of Argentina subjected to runoff and erosion

Chagas

Kraemer

Santanatoglia

et al. 2014

Span. j. agric. res.

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Grain production has displaced livestock to marginal lands in most of the productive regions in Argentina since 1990. In the fertile Rolling Pampa region, extensive cattle production has been concentrated in lowlands subjected to flooding, salt excess, erosion and sedimentation processes but also in some feedlots recently located in sloping arable lands prone to soil erosion. We studied the concentration of microbiological contamination indicators in runoff water and sediments accumulated in depressions along the tributary network from these lands devoted to cattle production. The aims of this work were: (i) to gather a reliable set of data from different monitoring periods and scales, (ii) to search for simple and sensible variables to be used as indicators for surface water quality advising purposes and (iii) to corroborate previous biological contamination conceptual models for this region. Concentration of pollution indicators in these ponds was related to mean stocking rates from nearby fields and proved to depend significantly on the accumulated water and sediments. Viable mesophiles and total coliforms were found mainly attached to large sediments rather than in the runoff water phase. Seasonal sampling showed that the time period between the last significant runoff event and each sampling date regarding enterococci proved to be a sensible variable for predicting contamination. Enterococci concentration tended to increase gradually until the next extraordinary runoff event washed away contaminants. The mentioned relationship may be useful for designing early warning surface water contamination programs regarding enterococci dynamics and other related microbial pollutants as well.

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“…For example: C2C in the UK (Saul et al 2011), TIMOTHY in Belgium (de Brauwere et al 2011, Ouattara et al 2013, and SCCWRP in the USA (Field and Samadpour 2007, Griffith et al 2009, de Brauwere et al 2014. In recent decades, there has been rapid development in the increasing sophistication of numerical models for FIO process simulations in catchments (Benham et al 2006, Stumpf et al 2010, Cho et al 2012, Tetzlaff et al 2012, Ghimire and Deng 2013, in river networks (Wilkinson et al 1995, Yang et al 2002 and in estuaries (Connolly et al 1999, Bai and Lung 2005, Gao et al 2011. Furthermore, some studies have been undertaken including both rivers and coastal waters (Kashefipour et al 2002, 2006, de Brauwere et al 2011, de Brauwere et al 2014.…”

Section: Introductionmentioning

confidence: 99%

Cloud to coast: integrated assessment of environmental exposure, health impacts and risk perceptions of faecal organisms in coastal waters

Huang

Falconer

Boye

et al. 2015

International Journal of River Basin Management

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The proper recognition and calculation of polluted sources and the fate and transport of faecal organisms in catchments, river networks and coastal waters are very important to the assessment of environmental exposure, health impacts and risk perceptions of faecal indicator organisms (FIO) in coastal waters. The paper reviews the integrated modelling techniques for faecal processes from cloud to coast, including sediment and faecal bacteria interactions, and then presents a theoretical and case study in the numerical modelling for FIO levels in the river Ribble and Fylde Coast using the twodimensional or three-dimensional environmental fluid dynamics code and the 1D Flow And Solute Transport in Estuaries and Rivers models, respectively. The related key parameters in the linked model are illustrated and analysed, together with validation of the hydrodynamic processes and the faecal bacteria concentration levels being undertaken using measured related data acquired in 1999. Using the model results, a quantitative microbial risk assessment is undertaken, where a moderate dose for swimming in faecal coliform-laden flows is accepted, as given by the European (EU) water quality standard requirements. The results show that some local regions of relatively high concentration exist near the outfalls and these values are not compliant with the mandatory and tighter microbial standards in the UK, as governed by the new EU Water Framework Directive. Finally, some new research and key challenges for the future are discussed in the paper.

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Modeling sediment impact on the transport of fecal bacteria

Cited by 178 publications

References 28 publications

Relating Watershed Characteristics to Elevated Stream Escherichia coli Levels in Agriculturally Dominated Landscapes: An Iowa Case Study

Relating Watershed Characteristics to Elevated Stream Escherichia coli Levels in Agriculturally Dominated Landscapes: An Iowa Case Study

Biological water contamination in some cattle production fields of Argentina subjected to runoff and erosion

Cloud to coast: integrated assessment of environmental exposure, health impacts and risk perceptions of faecal organisms in coastal waters

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