Contribution Water remote sensing

example of specific phytoplankton absorption spectra. in graph characteristic blue , red ch-a peaks @ 438 nm , 676 nm can seen. visible peak cyanophicocianin absorption maximum @ 624 nm.

by use of optical close range devices (e.g. spectrometers, radiometers), airplanes or helicopters (airborne remote sensing) , satellites (space born remote sensing), light reflected water bodies measured. instance, algorithms used retrieve parameters such chlorophyll-a(chl-a) , suspended particulate matter (spm) concentration, absorption colored dissolved organic matter @ 440 nm (acdom) , secchi depth. measurement of these values give idea water quality of water body being studied. high concentration of green pigments chlorophyll might indicate presence of algal bloom, example, due eutrophication processes. thus, chlorophyll concentration used proxy or indicator trophic condition of water body. in same manner, other optical quality parameters such suspended particles or suspended particulate matter (spm), colored dissolved organic matter (cdom), transparency (kd), , chlorophyll-a (chl-a) can used monitor water quality.