(2005) Total Maximum Daily Load for Nutrients and Algae, Clear Lake, Cerro Gordo County Iowa, 2005. Natural Resources, Department of
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clearlake.pdf File Size:246kB |
Abstract
The Federal Clean Water Act requires the Iowa Department of Natural Resources (IDNR) to develop a total maximum daily load (TMDL) for waters that have been identified on the state’s 303(d) list as impaired by a pollutant. Clear Lake has been identified as impaired by algal blooms in response to high nutrient loading. The TMDL for Clear Lake calculates the maximum allowable phosphorus loading that will meet narrative standards for nuisance algal blooms and provide water quality fully supporting the lake’s designated uses. The relationship of total phosphorus to chlorophyll (algae indicator) and Secchi depth is made by using Carlson’s Trophic State Index (TSI). The TMDL water quality targets are expressed as TSI values based on historic and existing conditions and the characteristics and uses of the lake and its watershed.
| Item Type: | Departmental Report |
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| Keywords: | TMDL Clear Lake Nutrients Algae |
| Subjects: | Natural resources and environment > Water resources > Water quality |
| ID Code: | 52412 |
| Deposited By: | Mr Jamie Mootz |
| Deposited On: | 01 Apr 2025 19:09 |
| Last Modified: | 01 Apr 2025 19:09 |
| URI: | https://publications.iowa.gov/id/eprint/52412 |