Document Detail

A geographical approach to tracking Escherichia coli and other water quality constituents in a Texas coastal plains watershed.
MedLine Citation:
PMID:  23014925     Owner:  NLM     Status:  Publisher    
Diffuse sources of surface water pathogens and nutrients can be difficult to isolate in larger river basins. This study used a geographical or nested approach to isolate diffuse sources of Escherichia coli and other water quality constituents in a 145.7-km(2) river basin in south central Texas, USA. Average numbers of E. coli ranged from 49 to 64,000 colony forming units (CFU) per 100 mL depending upon season and stream flow over the 1-year sampling period. Nitrate-N concentrations ranged from 48 to 14,041 μg L(-1) and orthophosphate-P from 27 to 2,721 μg L(-1). High concentrations of nitrate-N, dissolved organic nitrogen, and orthophosphate-P were observed downstream of waste water treatment plants but E. coli values were higher in a watershed draining an older part of the city. Total urban land use explained between 56 and 72 % of the variance in mean annual E. coli values (p < 0.05) in nine hydrologically disconnected creeks. Of the types of urban land use, commercial land use explained most of the variance in E. coli values in the fall and winter. Surface water sodium, alkalinity, and potassium concentrations in surface water were best described by the proportion of commercial land use in the watershed. Based on our nested approach in examining surface water, city officials are able to direct funding to specific areas of the basin in order to mitigate high surface water E. coli numbers and nutrient concentrations.
C L Harclerode; T J Gentry; J A Aitkenhead-Peterson
Related Documents :
22648345 - Use of carbonised beet pulp carbon for removal of remazol turquoise blue-g 133 from aqu...
15773475 - Sonolytic desorption of mercury from aluminum oxide.
24477615 - Spatial and seasonal characteristics of river water chemistry in the taizi river in nor...
19917655 - The relationship between water bridges and the polyproline ii conformation: a large-sca...
2450095 - Translocation of rna-coated gold particles through the nuclear pores of oocytes.
8593045 - Inactivation of fecal bacteria in drinking water by solar heating.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-27
Journal Detail:
Title:  Environmental monitoring and assessment     Volume:  -     ISSN:  1573-2959     ISO Abbreviation:  Environ Monit Assess     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8508350     Medline TA:  Environ Monit Assess     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Soil and Crop Sciences, Texas A&M University, 2474 TAMU, College Station, TX, 77843, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Associations between self-reported odour annoyance and volatile organic compounds in 'Chemical Valle...
Next Document:  Natural stilbenoids: distribution in the plant kingdom and chemotaxonomic interest in Vitaceae.