HydroColor App

HydroColor is a water quality application that uses the smartphone's digital camera to determine the reflectance of natural water bodies. Using this information, HydroColor can estimate water turbidity (0-80 NTU), concentration of suspended particulate matter (SPM) (g/m^3) and the backscattering coefficient in the red (1/m). IMPORTANT: HydroColor requires the use of an 18% photographers gray card as a reference. Gray cards are widely available at photography shops and online. Visit the supporting website for more information on gray cards.

Learn more here: 

https://serc.si.edu/sites/default/files/Citizen/cww_hydrocolor_protocol_print_0.pdf

https://www.mdpi.com/1424-8220/18/1/256

https://pubmed.ncbi.nlm.nih.gov/29337917/