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NAVIGATING THE TMDL PROCESS: EVALUATION AND IMPROVEMENTS

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Abstract:

Navigating the TMDL Process: Evaluation and Improvements is a WERF-funded research effort begun in late 2000 and is directed toward improving the TMDL process. The research will be completed in December 2002, with publication of the final report in Spring 2003. The objective of this research was to investigate issues and concerns with the TMDL program, and to develop and identify ways to improve the TMDL process.

A detailed survey of eight state TMDL programs from four different areas of the country was developed to further investigate each issue. Additionally, the researchers conducted a broad review of the characteristics of 176 approved TMDLs, and detailed reviews of several TMDLs are used as case studies.

Findings of this investigation will be presented with specific emphasis on several issues identified for further study. These issues were highlighted as areas in need of improved approaches in the TMDL program, and the final WERF report will describe improved methodologies and provide examples for each of the following ten issues:



Improved Methods for Calculating the TMDL Margin of Safety


Incorporating Urban Wet Weather Point Sources in the TMDL Program


Guidance for Modeling Approach in a TMDL Process


Estimating Background Pollutant Loads


Linking Best Management Practices to Load Reductions


Quantifying Existing and Future Nonpoint Source Loads


Interrelationships Among Multiple Loads and Critical Conditions


Approaches for the Allocation of Loads in TMDLs


Implementation Planning, Tracking, and Adjustments


Adaptive Watershed Management in the TMDL Process


An overview of the research findings is provided in this presentation. More detailed information is provided in other presentations in the conference on individual topics.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864702785072010

Publication date: 2002-01-01

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