Abstract：
:Many water quality monitoring programs quantify Escherichia coli, an indicator of fecal contamination and potential sewage pollution. However, interpretation of E. coli data can be complex due to abiotic factors that influence its growth and mortality. The goal of this study was to quantify the variability of E. coli in a river and assess the impact of that variability on water quality monitoring study design and sewage pollution source identification. Over 1900 samples were collected and analyzed from 2007 to 2017 in the Norwalk River in Connecticut. Sixty-six percent of the samples collected during weekly to monthly monitoring had E. coli concentrations below 200 CFU/100 mL, indicating that elevated bacteria concentrations were captured infrequently. Patterns observed during daily sampling indicated that the randomization of sampling days within a week may support the identification of pollution sources driven by human behavioral patterns. Spatial autocorrelation in bacteria concentrations was not observed between sites, indicating that the sample locations were not spaced sufficiently close together to be redundant for monitoring. On finer spatial scales however, detection of a known pollution source was found to be challenging at even short distances downstream, with less than 25% of the original source concentration detected at 10 m downstream and less than 10% by 1000 m downstream, suggesting that a high density of study sites may be needed to detect potential sources. These findings can be used to better understand the natural variability of this important indicator organism in freshwater systems, and inform more efficient and effective monitoring.
journal_name
Environ Monit Assessjournal_title
Environmental monitoring and assessmentauthors
Crosby SC,Spiller NC,Tietz KE,Cooper JR,Fraboni PJdoi
10.1007/s10661-019-7930-1subject
Has Abstractpub_date
2019-11-13 00:00:00pages
745issue
12eissn
0167-6369issn
1573-2959pii
10.1007/s10661-019-7930-1journal_volume
191pub_type
杂志文章abstract：:Changing the landscape has serious environmental impacts affecting the ecosystem services, particularly in the tropics. In this paper, we report changes in ecosystem services in relation to land use and land cover over an 18-year period (1988--2006) in the Menglun Township, Xishuangbanna, Southwest China. We used Land...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-007-0067-7
更新日期：2008-11-01 00:00:00
abstract：:We investigated environmental impacts on rainbow trout (Oncorhynchus mykiss) reared at fish farms with either extensive technology, in a flow-through system (FTS, n = 3), or intensive technology, in a recirculating aquaculture system (RAS, n = 3). All fish were fed the same rations. Fish were caught in spring and autu...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-017-6278-7
更新日期：2017-11-06 00:00:00
abstract：:The study was conducted to observe the persistence pattern and risk assessment of cypermethrin in chilli fruits following three applications of cypermethrin (Super fighter 25 EC) at 50 and 100 g a.i. ha(-1) at 10-day interval. Residues of cypermethrin in chilli were estimated by gas liquid chromatography (GLC) and wer...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-015-4341-9
更新日期：2015-03-01 00:00:00
abstract：:A portion of Arizona's San Pedro River is managed as a National Riparian Conservation Area but is potentially affected by ground-water withdrawals beyond the conservation area borders. We applied an assessment model to the Conservation Area as a basis for monitoring long-term changes in riparian ecosystem condition re...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-006-6549-1
更新日期：2006-04-01 00:00:00
abstract：:The partial differential equations governing the migration of adsorbable pollutants undergoing 2-dimensional flow in saturated aquifers are presented. The analytical solution of these equations is rarely possible, and the use of mesh or grid techniques for numerical integration leads to so-called numerical dispersion,...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/BF00394460
更新日期：1982-09-01 00:00:00
abstract：:Tissue distribution and bioaccumulation of organochlorine pesticides (OCPs) in edible fishes collected from Taihu Lake, Cyprinus carpio (C. carpio) and Ctenopharyngodon idellus (C. idellus), were studied. OCPs were detected in all samples with hexachlorocyclohexanes (HCHs), aldrins (including aldrin, dieldrin, endrin,...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-013-3249-5
更新日期：2013-11-01 00:00:00
abstract：:In this study, three different sensors of satellites including the Moderate Resolution Imaging Spectroradiometer (MODIS), Multi-angle Imaging SpectroRadiometer (MISR), and Total Ozone Mapping Spectrometer (TOMS) were used to study spatial and temporal variations of aerosols over ten populated cities in Iran. Also, the...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-017-6336-1
更新日期：2017-12-01 00:00:00
abstract：:Inadequate knowledge of baseline conditions challenges ability for monitoring programs to detect pollution in rivers, especially where there are natural sources of contaminants. Here, we use paleolimnological data from a flood-prone lake ("SD2", informal name) in the Slave River Delta (SRD, Canada), ∼ 500 km downstrea...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-016-5277-4
更新日期：2016-05-01 00:00:00
abstract：:A mathematical model was used to examine the effects of choosing various units of sampling distance of a zigzag survey on the adequacy of reconstructing patchy distribution fields. The model simulates fish or plankton patches (or gaps) of different shapes and spatial orientations, and an acoustic survey by zigzag or p...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1023/a:1020350214466
更新日期：2002-11-01 00:00:00
abstract：:In this paper, COSMO numerical weather prediction model is used to simulate land-sea breeze circulation in the north coast of Oman and to analyze the variability of the PBL depth. Typical summer day 1st August 2009 and winter day 1st January 2009 were simulated and verified by surface observations. The COSMO model was...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-012-2712-z
更新日期：2013-03-01 00:00:00
abstract：:An increase in the human population, urbanization, industrialization, infrastructural development, and current agricultural practices acts as major factors leading to the decline of the groundwater table in the region. The present study analyzes the noticeable effect of anthropogenic pressure on the groundwater table ...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-020-08496-8
更新日期：2020-07-16 00:00:00
abstract：:Studies were conducted to describe a method for the characterisation of natural and waste waters using plant seed germination as a technique for toxicity testing. Maize seeds were found to be more sensitive to differences in water quality than cowpea seeds and also showed more consistency in results. Trials conducted ...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/BF00394974
更新日期：1991-08-01 00:00:00
abstract：:The Juru River flows through largely urbanized areas and is grossly polluted by domestic wastes and discharges from pig farms. Other than carrying highly polluting organic materials, these wastes are also contaminated with heavy metals. To ascertain the extent of heavy metal pollution in the river, total and non-resid...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/BF00633708
更新日期：1995-04-01 00:00:00
abstract：:Eighty-one cutaway peat production fields with a total area of about 9000 ha exist and were studied in Estonia in 2005-2015. Only a very small number of the fields (seven) have been restored-either afforested or used for growing berries. The re-vegetation of Estonian cutaway peat production fields is mainly the result...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-016-5669-5
更新日期：2016-12-01 00:00:00
abstract：:Air pollution due to small scale industries have been found to cause serious occupational health hazards and adverse effects on vegetation and heritage. The study for air pollution impact assessment for brick kiln industries was undertaken. The stack monitoring exercise was carried out to estimate the pollution level ...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1023/a:1020636930033
更新日期：2002-12-01 00:00:00
abstract：:A supervised field trial was conducted on tea with propineb at 1,750 and 3,500 g a.i./ha at two locations (Assam and Darjeeling), applied thrice at an interval of 10 days during the year 2006-2007. Propineb residue was measured spectrophotometrically at 435 nm in terms of CS2. The initial deposit of propineb in green ...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-009-1234-9
更新日期：2010-11-01 00:00:00
abstract：:In this study, radiological distribution of gross alpha, gross beta, (226)Ra, (232)Th, (40)K, and (137)Cs for a total of 40 natural spring water samples obtained from seven cities of the Eastern Black Sea Region was determined by artificial neural network (ANN) method. In the ANN method employed, the backpropagation a...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-015-4811-0
更新日期：2015-09-01 00:00:00
abstract：:The safe disposal of pulp and paper mill effluent is still a threat to the environment due to the presence of several unknown organic pollutants. The comparative physico-chemical analysis of pulp and paper mill effluent-contaminated sediment (PPECS) of site 1 and site 2 showed that the sediment had an alkaline nature ...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-018-6947-1
更新日期：2018-09-11 00:00:00
abstract：:We present diurnal variation of ambient ammonia (NH(3)) in relation with other trace gases (O(3), CO, NO, NO(2), and SO(2)) and meteorological parameters at an urban site of Delhi during winter period. For the first time, ambient ammonia (NH(3)) was monitored very precisely and continuously using ammonia analyzer, whi...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-009-0791-2
更新日期：2010-03-01 00:00:00
abstract：:Morgan Island, located within the ACE Basin National Estuarine Research Reserve in South Carolina, is home to the only free-ranging colony of rhesus monkeys (Macca mulatta) in the continental United States. The purpose of this study was to assess environmental impacts of the monkey colony on water quality in adjacent ...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-007-9766-3
更新日期：2008-02-01 00:00:00
abstract：:The study addressed the impact of the El Niño 2015-2016 on the ecosystem functioning and the subsequent effects on the distribution and community structure of zooplankton in the Kavaratti reef, a prominent coral atoll in the tropical Indian Ocean. The elevated ocean temperature (SST) associated with El Niño resulted i...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-018-6842-9
更新日期：2018-07-13 00:00:00
abstract：:The heavy metal concentrations of soil and dust samples from roadside, residential areas, parks, campus sport grounds, and commercial sites were studied in Guangzhou, South China. Heavy metals in samples were determined by inductively coupled plasma atomic emission spectrophotometer following acidic digestion with HCl...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-012-2617-x
更新日期：2013-02-01 00:00:00
abstract：:This study reports source apportionment of polycyclic aromatic hydrocarbons (PAHs) in particulate depositions on vegetation foliages near highway in the urban environment of Lucknow city (India) using the principal components analysis/absolute principal components scores (PCA/APCS) receptor modeling approach. The mult...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-007-9674-6
更新日期：2008-01-01 00:00:00
abstract：:Soil erosion is an open topic, not only because soil fertility is lost, but also because nutrients are spilled into water bodies, thereby causing pollution. Research carried out in this field has amply described this process, but the interaction between these factors is complex and experimental research is needed to u...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-014-3972-6
更新日期：2014-11-01 00:00:00
abstract：:Fifty seven isolates of thermotolerant E. coli were recovered from 188 drinking water sources, 45 (78.9%) were typable of which 15 (26.3%) were pathogenic serotypes. Pathogenic serogroup obtained were 04 (Uropathogenic E. coli, UPEC), 025 (Enterotoxigenic E. coli, ETEC), 086 (Enteropathogenic E. coli, EPEC), 0103 (Shi...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-006-9390-7
更新日期：2007-07-01 00:00:00
abstract：:A procedure using pre-column trimethylsilyl derivatization and gas chromatography/ mass spectrometry (GC/MS) was developed and applied in determining trace estrogens in complex matrix. Main conditions were optimized, including pH value, salinity of water sample, elution reagents, clean procedure, derivative solvent an...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-008-0563-4
更新日期：2009-11-01 00:00:00
abstract：:In a vast semiarid region of the Baja California Peninsula, remote sensing and GIS techniques were applied to moderate resolution images of Landsat 5 TM to explore the geospatial correlation among the grid aridity index (AI), shapefiles of geologic strata, land use, and geological fractures. A dataset of randomized sa...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-015-4676-2
更新日期：2015-07-01 00:00:00
abstract：:Assessing land degradation is essentially needed for decision-makers to monitor and mitigate degradation and implement sustainable land management practices. More specifically, monitoring land degradation on a regular basis enables decision-makers to analyze impact of degradation and effects of sustainable land manage...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-019-7739-y
更新日期：2019-08-15 00:00:00
abstract：:In this study, a new analytical strategy was developed to determine trace cadmium in aqueous samples with high sensitivity and accuracy. A combination of magnetic nickel nanoparticles (Ni-MNPs) based dispersive solid-phase extraction (DSPE) and flame atomic absorption spectrometry fitted with a slotted quartz tube (SQ...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-020-08548-z
更新日期：2020-08-15 00:00:00
abstract：:The objective of this study was to investigate the risks associated with the use of roof-harvested rainwater (RHRW) and the implication of pigeons as the most likely source of contamination by testing for antibiotic resistance profiles of Escherichia coli. A total of 239 E. coli were isolated from thirty fresh pigeon ...
journal_title：Environmental monitoring and assessment
pub_type： 杂志文章
doi：10.1007/s10661-015-4636-x
更新日期：2015-07-01 00:00:00
