Bacteria TMDLs for Lakes: A Proposed Methodology to a Challenging Endeavor
Abstract:Iowa, like many states, has seen its 303(d) list grow rapidly in recent years with increased monitoring and assessment data. The number of lakes for which primary contact recreation is impaired due to high levels of bacteria accounts for a substantial portion of the recent additions to Iowa's 303(d) list. The development of bacteria TMDLs for lakes requires answering at least four challenging questions: (1) What is the critical volume and/or location in the lake for water quality compliance, (2) what critical conditions, hydrological or otherwise, must be considered when developing the TMDL, (3) how will bacteria source loads and in-lake bacteria dynamics be modeled, and (4) what are the implications of high variability and high overall bacteria levels for TMDL implementation? This paper and presentation examine these and other challenges to developing bacteria TMDLs for lakes. An approach utilized by the Iowa Department of Natural Resources (IDNR) for Lake Geode, a 174-acre lake located in Henry and Des Moines Counties in southeast Iowa, serves as the case study.
Document Type: Research Article
Publication date: January 1, 2009
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 These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Ingenta Connect is not responsible for the content or availability of external websites