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Title: Evaluation of watershed-derived mass loads to prioritize TMDL decision-making

Abstract

A total maximum daily load (TMDL) for oxygen demanding substances is being implemented in the San Joaquin River (SJR) in California (USA) due to frequently occurring low dissolved oxygen conditions. The SJR is a eutrophic river, heavily impacted by agriculture. A mass balance was developed to identify the sources of oxygen-demanding substances and nutrients to the river with the objective of providing a scientific basis for management actions needed to meet TMDL requirements. Data were collected for flow and water quality and mass loads calculated for sites within the main stem of the SJR, river inputs (tributaries), and diversions in the study area. Using a quadrant analysis, tributary flows and loads are ranked to identify targets for water quality improvement efforts. Additionally, all mass loads were summed (inputs minus diversions) and compared with observed loads at the downstream limit of the study area. The mass balance analysis identifies major contributors of mass loads and mass balance closure is assessed for each constituent. These analysis methods inform the TMDL process which includes a load allocation, and is useful for determining locations for implementation of improvement projects needed to improve the health of the river.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2]
  1. Univ. of the Pacific, Stockton, CA (United States). Ecological Engineering Research Program
  2. Univ. of the Pacific, Stockton, CA (United States). Ecological Engineering Research Program; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Earth Sciences Division
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1579918
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Water Science and Technology
Additional Journal Information:
Journal Volume: 73; Journal Issue: 3; Journal ID: ISSN 0273-1223
Publisher:
IWA Publishing
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Gulati, S., Stubblefield, A. A., Hanlon, J. S., Spier, C. L., Camarillo, M. K., and Stringfellow, W. T. Evaluation of watershed-derived mass loads to prioritize TMDL decision-making. United States: N. p., 2015. Web. doi:10.2166/wst.2015.530.
Gulati, S., Stubblefield, A. A., Hanlon, J. S., Spier, C. L., Camarillo, M. K., & Stringfellow, W. T. Evaluation of watershed-derived mass loads to prioritize TMDL decision-making. United States. doi:10.2166/wst.2015.530.
Gulati, S., Stubblefield, A. A., Hanlon, J. S., Spier, C. L., Camarillo, M. K., and Stringfellow, W. T. Tue . "Evaluation of watershed-derived mass loads to prioritize TMDL decision-making". United States. doi:10.2166/wst.2015.530. https://www.osti.gov/servlets/purl/1579918.
@article{osti_1579918,
title = {Evaluation of watershed-derived mass loads to prioritize TMDL decision-making},
author = {Gulati, S. and Stubblefield, A. A. and Hanlon, J. S. and Spier, C. L. and Camarillo, M. K. and Stringfellow, W. T.},
abstractNote = {A total maximum daily load (TMDL) for oxygen demanding substances is being implemented in the San Joaquin River (SJR) in California (USA) due to frequently occurring low dissolved oxygen conditions. The SJR is a eutrophic river, heavily impacted by agriculture. A mass balance was developed to identify the sources of oxygen-demanding substances and nutrients to the river with the objective of providing a scientific basis for management actions needed to meet TMDL requirements. Data were collected for flow and water quality and mass loads calculated for sites within the main stem of the SJR, river inputs (tributaries), and diversions in the study area. Using a quadrant analysis, tributary flows and loads are ranked to identify targets for water quality improvement efforts. Additionally, all mass loads were summed (inputs minus diversions) and compared with observed loads at the downstream limit of the study area. The mass balance analysis identifies major contributors of mass loads and mass balance closure is assessed for each constituent. These analysis methods inform the TMDL process which includes a load allocation, and is useful for determining locations for implementation of improvement projects needed to improve the health of the river.},
doi = {10.2166/wst.2015.530},
journal = {Water Science and Technology},
number = 3,
volume = 73,
place = {United States},
year = {2015},
month = {10}
}

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Works referenced in this record:

Use of continuous and grab sample data for calculating total maximum daily load (TMDL) in agricultural watersheds
journal, March 2014


Scientific Studies Supporting Development of a Dissolved Oxygen TMDL
journal, January 2008


Investigation of river eutrophication as part of a low dissolved oxygen total maximum daily load implementation
journal, January 2009

  • Stringfellow, William; Herr, Joel; Litton, Gary
  • Water Science and Technology, Vol. 59, Issue 1
  • DOI: 10.2166/wst.2009.739

How green is my river? A new paradigm of eutrophication in rivers
journal, July 2006


Automated separation and conductimetric determination of ammonia and dissolved carbon dioxide
journal, September 1978


Continuous flow reduction of nitrate to ammonia with granular zinc
journal, June 1986


Phytoplankton Regulation in a Eutrophic Tidal River (San Joaquin River, California) [English]
journal, March 2005


The Twenty Needs Report: How Research Can Improve the TMDL Program. EPA841-B-02-002
journal, January 2002

  • U. S. Environmental Protection Agency Office o.,
  • Proceedings of the Water Environment Federation, Vol. 2002, Issue 8
  • DOI: 10.2175/193864702785072155

Determination of dissolved organic nitrogen using persulfate oxidation and conductimetric quantification of nitrate‐nitrogen
journal, December 1994

  • Yu, Z. S.; Northup, R. R.; Dahlgren, R. A.
  • Communications in Soil Science and Plant Analysis, Vol. 25, Issue 19-20
  • DOI: 10.1080/00103629409369255

Ranking methods to set restoration and remediation priorities on a watershed scale
journal, November 2008

  • Stringfellow, William T.
  • Water Science and Technology, Vol. 58, Issue 10
  • DOI: 10.2166/wst.2008.567

Sources and transport of algae and nutrients in a Californian river in a semi-arid climate
journal, December 2007