For example, i read few journal articles on simple photosynthesis model to estimate the level of eutrophication of the lake using water quality parameters. note that i am not a mathematical-related student, so i appreciate any basic idea or suggestion on the mathematical model. i am currently collecting data on water quality parameters (DO, BOD, temp, pH, conductivity, TDS etc.) and phytoplankton. i would like to estimate what will happen to my study area which is a huge man-made lake with a total area of 152km squared in few years ahead whether is there any eutrophication threat or high sedimentation rate will happen to the lake.