Skip to main content


Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial


The State of Georgia identified impaired stream segments in the Georgia East 2 basins, Ogeechee and Savannah, for dissolved oxygen (DO). Typically, these segments do not have long-term flow or water quality measurements. Among the challenges present were determining natural and critical conditions for the TMDL process. An approach was developed to address these needs in data limited segments. A segment-by-segment approach using locally and regionally observed data and published values was used to address these needs.

The development of an approach required an analysis of existing data from regional stations and a series of educated assumptions based on the local characteristics of the system. The calibration process was challenging with some parameters being measured while others were reasonably estimated or provided using best professional judgement.

A key obstacle in this study was the definition of natural DO conditions. Many of the segments addressed were low-gradient streams and naturally exhibited DO values typically lower than the criteria, conditions not unfamiliar in Southeastern GA. It was important to develop a TMDL approach for these segments involving the setup of steady-state models, calibrating to low-flow conditions, and determining the natural and critical conditions relative to existing conditions. Allocations were then derived from the results of these conditions.

Document Type: Research Article


Publication date: 2005-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more