you can read this paper Estimating and mapping chlorophyll-a concentration in Pensacola Bay,

Florida using Landsat ETM + data by IJRS

Hi,

You can use ACOLITE free software to calculate Chlorophyll-a automatically by applying different algorithms and atmospheric corrections. This is much easier than implementing equations by yourself.

https://odnature.naturalsciences.be/remsem/software-and-data/acolite

Hello

The C2RCC algorithm with SNAP program can calculate Chlorophyll well.

See this link:

https://forum.step.esa.int/t/retriving-chlorophyll-and-turbidity-from-sentinel-data/9398/3

NDVI will be a one of the simple method to detect the Chlorophyll of dams and reservoirs.

Hi Ndamulelo Musumuvhi ;

I developed the following model to estimate Chlorophyll-a concentration in inland waters and showed a good correlation with in-site measurements (r2=0.77) when using Landsat 8 Products:

Cl-a [mg/m3] = e^((Green/Blue+Green/Red+NIR/Red))

For the methodolgy to apply the model you can check the paper:

Conference Paper Changes in the Trophic State Of Lake Valencia (Venezuela) fr...

Feel free to contact me if you have additional questions in how to apply the model.