Quantifying pathogen sources in streams by hydrograph separation

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A new technique for quantifying pathogen sources to streams is proposed and demonstrated. Hydrograph separation is used to partition measured streamflow into surface runoff and base flow, and characteristic pathogen concentrations are assigned to each flow component along with a background source flux. The maximum-likelihood characteristic concentrations and background flux are determined from measured instream pathogen concentrations. This approach is shown to yield comparable to superior performance in predicting instream pathogen concentrations compared with much more complex terrestrial fate and transport models. Application of the proposed approach to six catchments yields Nash-Sutcliffe efficiencies of the log-transformed fecal-coliform concentrations in the range of 0.21 to 0.48. The characteristic fecal-coliform concentrations in surface runoff are in the range of 200-700 cfu/dL and the base-flow characteristic concentrations are in the range of 20-100 cfu/dL. It is shown that the frequency distribution of bacteria concentrations derived from sample measurements can sometimes differ significantly from their long-term frequency distribution.

Original languageEnglish
Pages (from-to)770-781
Number of pages12
JournalJournal of Environmental Engineering
Volume137
Issue number9
DOIs
StatePublished - Sep 1 2011

Fingerprint

Pathogens
hydrograph
pathogen
fecal coliform
baseflow
Runoff
runoff
Fluxes
Catchments
Maximum likelihood
streamflow
Bacteria
catchment
bacterium
distribution

Keywords

  • Bacteria
  • Base flow
  • Fate and transport
  • Fecal coliforms
  • HSPF
  • Hydrographs
  • Model
  • Pathogens
  • SWAT
  • TMDL
  • Water pollution
  • Watershed
  • Watersheds

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Science(all)
  • Environmental Chemistry
  • Civil and Structural Engineering

Cite this

Quantifying pathogen sources in streams by hydrograph separation. / Chin, David A.

In: Journal of Environmental Engineering, Vol. 137, No. 9, 01.09.2011, p. 770-781.

Research output: Contribution to journalArticle

@article{2b2fd98ee08f40d587b695b70facab68,
title = "Quantifying pathogen sources in streams by hydrograph separation",
abstract = "A new technique for quantifying pathogen sources to streams is proposed and demonstrated. Hydrograph separation is used to partition measured streamflow into surface runoff and base flow, and characteristic pathogen concentrations are assigned to each flow component along with a background source flux. The maximum-likelihood characteristic concentrations and background flux are determined from measured instream pathogen concentrations. This approach is shown to yield comparable to superior performance in predicting instream pathogen concentrations compared with much more complex terrestrial fate and transport models. Application of the proposed approach to six catchments yields Nash-Sutcliffe efficiencies of the log-transformed fecal-coliform concentrations in the range of 0.21 to 0.48. The characteristic fecal-coliform concentrations in surface runoff are in the range of 200-700 cfu/dL and the base-flow characteristic concentrations are in the range of 20-100 cfu/dL. It is shown that the frequency distribution of bacteria concentrations derived from sample measurements can sometimes differ significantly from their long-term frequency distribution.",
keywords = "Bacteria, Base flow, Fate and transport, Fecal coliforms, HSPF, Hydrographs, Model, Pathogens, SWAT, TMDL, Water pollution, Watershed, Watersheds",
author = "Chin, {David A.}",
year = "2011",
month = "9",
day = "1",
doi = "10.1061/(ASCE)EE.1943-7870.0000394",
language = "English",
volume = "137",
pages = "770--781",
journal = "Journal of Environmental Engineering, ASCE",
issn = "0733-9372",
publisher = "American Society of Civil Engineers (ASCE)",
number = "9",

}

TY - JOUR

T1 - Quantifying pathogen sources in streams by hydrograph separation

AU - Chin, David A.

PY - 2011/9/1

Y1 - 2011/9/1

N2 - A new technique for quantifying pathogen sources to streams is proposed and demonstrated. Hydrograph separation is used to partition measured streamflow into surface runoff and base flow, and characteristic pathogen concentrations are assigned to each flow component along with a background source flux. The maximum-likelihood characteristic concentrations and background flux are determined from measured instream pathogen concentrations. This approach is shown to yield comparable to superior performance in predicting instream pathogen concentrations compared with much more complex terrestrial fate and transport models. Application of the proposed approach to six catchments yields Nash-Sutcliffe efficiencies of the log-transformed fecal-coliform concentrations in the range of 0.21 to 0.48. The characteristic fecal-coliform concentrations in surface runoff are in the range of 200-700 cfu/dL and the base-flow characteristic concentrations are in the range of 20-100 cfu/dL. It is shown that the frequency distribution of bacteria concentrations derived from sample measurements can sometimes differ significantly from their long-term frequency distribution.

AB - A new technique for quantifying pathogen sources to streams is proposed and demonstrated. Hydrograph separation is used to partition measured streamflow into surface runoff and base flow, and characteristic pathogen concentrations are assigned to each flow component along with a background source flux. The maximum-likelihood characteristic concentrations and background flux are determined from measured instream pathogen concentrations. This approach is shown to yield comparable to superior performance in predicting instream pathogen concentrations compared with much more complex terrestrial fate and transport models. Application of the proposed approach to six catchments yields Nash-Sutcliffe efficiencies of the log-transformed fecal-coliform concentrations in the range of 0.21 to 0.48. The characteristic fecal-coliform concentrations in surface runoff are in the range of 200-700 cfu/dL and the base-flow characteristic concentrations are in the range of 20-100 cfu/dL. It is shown that the frequency distribution of bacteria concentrations derived from sample measurements can sometimes differ significantly from their long-term frequency distribution.

KW - Bacteria

KW - Base flow

KW - Fate and transport

KW - Fecal coliforms

KW - HSPF

KW - Hydrographs

KW - Model

KW - Pathogens

KW - SWAT

KW - TMDL

KW - Water pollution

KW - Watershed

KW - Watersheds

UR - http://www.scopus.com/inward/record.url?scp=80052857354&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80052857354&partnerID=8YFLogxK

U2 - 10.1061/(ASCE)EE.1943-7870.0000394

DO - 10.1061/(ASCE)EE.1943-7870.0000394

M3 - Article

AN - SCOPUS:80052857354

VL - 137

SP - 770

EP - 781

JO - Journal of Environmental Engineering, ASCE

JF - Journal of Environmental Engineering, ASCE

SN - 0733-9372

IS - 9

ER -