Lake Trophic State Index (TSI) Calculator
This calculator helps environmental scientists and researchers determine the Trophic State Index (TSI) of a lake, providing insights into its ecological health.
Calculator
Results
Data Source and Methodology
All calculations are based on the standard TSI formulae used in limnology. For more details, refer to the official documentation at EPA. All calculations are strictly based on formulas and data provided by this source.
The Formula Explained
TSI = 60 + 9.81 × log10(Chlorophyll, µg/L)
Glossary of Variables
- Chlorophyll Concentration: The amount of chlorophyll in water, indicating algal biomass.
- Total Phosphorus: The total concentration of phosphorus, a key nutrient for algal growth.
- Secchi Depth: A measure of water transparency.
Example: A Step-by-Step Guide
For instance, inputting a Chlorophyll concentration of 20 µg/L, Total Phosphorus of 50 µg/L, and a Secchi Depth of 1.5m will yield a TSI value that indicates the lake's trophic state.
Frequently Asked Questions (FAQ)
What is Trophic State Index (TSI)?
The Trophic State Index is a classification system to compare water bodies based on nutrient concentration and biological productivity.
Why is TSI important?
TSI provides insights into the ecological health of a water body, indicating potential eutrophication levels.
How accurate is this calculator?
The calculator uses standard formulas recognized in environmental science for accurate results.
What are the limitations of TSI?
TSI may not account for all variables affecting a lake's ecosystem, such as pollution sources or climate conditions.
How can I improve the TSI of a lake?
Reducing nutrient runoff, managing water use, and protecting surrounding ecosystems can help improve TSI.