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  2. Freshwater environmental quality parameters - Wikipedia

    en.wikipedia.org/wiki/Freshwater_environmental...

    Freshwater environmental quality parameters are those chemical, physical and biological parameters that can be used to characterise a freshwater body. Because almost all water bodies are dynamic in their composition, the relevant quality parameters are typically expressed as a range of expected concentrations.

  3. Burning Index - Wikipedia

    en.wikipedia.org/wiki/Burning_Index

    The National Fire Danger Rating System (NFDRS) uses a modified version of Bryam's equation for flame length – based on the Spread Component (SC) and the available energy (ERC) – to calculate flame length from which the Burning Index is computed. [1] The equation for flame length is listed below: [1]

  4. Streeter–Phelps equation - Wikipedia

    en.wikipedia.org/wiki/Streeter–Phelps_equation

    The Streeter–Phelps equation is used in the study of water pollution as a water quality modelling tool. The model describes how dissolved oxygen (DO) decreases in a river or stream along a certain distance by degradation of biochemical oxygen demand (BOD).

  5. Forest fire weather index - Wikipedia

    en.wikipedia.org/wiki/Forest_fire_weather_index

    The last two components are the rate of fire spread if fuel is available for combustion, and the frontal fire intensity. [2] The essential information needed to calculate this index is: the humidity of the air at the beginning of the afternoon (when it has its lowest value); the temperature in the middle of the afternoon (when it has its ...

  6. Water quality modelling - Wikipedia

    en.wikipedia.org/wiki/Water_quality_modelling

    Water quality modeling also helps determine correlations to constituent sources and water quality along with identifying information gaps. [2] Due to the increase in freshwater usage among people, water quality modeling is especially relevant [3] both in a local level and global level. In order to understand and predict the changes over time in ...

  7. Why was a major reservoir empty when L.A. fires broke out? - AOL

    www.aol.com/why-major-reservoir-empty-l...

    For premium support please call: 800-290-4726 more ways to reach us. Sign in. Mail. ... fire," he wrote. "Water supply reservoirs are typically designed to cope with house fires, not wildfires." ...

  8. How strong are your finances, really? Part two: 4 more money ...

    www.aol.com/finance/more-financial-questions-to...

    You can calculate this ratio by adding up the value of your investments (not including your home equity) and dividing that by your net worth. Generally, you want this ratio to be at least 50% ...

  9. How to calculate your FIRE number - AOL

    www.aol.com/finance/calculate-fire-number...

    The first step in achieving FIRE is determining your FIRE number, or the amount of money you need to have saved to support your desired lifestyle without relying on traditional employment. At the ...