The relation between apparent and true water colour for pond water

Abstract

The colour of the water can be considered as apparent colour, which is determined by the amount of suspended matter such as clay, phytoplankton and colloidal particles, and true colour, which is the proportion of suspended matter passing through a membrane filter of pore size the 0.45 μm. This study aimed to investigate the apparent and true water colour of pond water and evaluate the impact of filtration on water colour. Using a spectrophotometer, measurements and analyses were conducted on pond water samples. The results of the study showed that filtration can significantly affect the water colour, with a clear difference observed between the apparent and true water colour. The research findings provide a deeper understanding of the factors that influence water colour.