5:15 PM - 6:30 PM
[MSD39-P06] Determination of Water Contaminant Concentration using Band Ratio and Statistical Method
Keywords:Water contaminant, Multispectral, Band ratio
Understanding pollution of inland waters such as rivers and lakes is an important issue, especially in water security for human life and pollution impact at the outflow, i.e., the ocean. Mainly, pollution in urban areas of Southeast Asia such as Malaysia is a serious issue. However, the in-situ measurement method is not sufficient due to the frequency and the number of observation points. The current trend of using remote sensing tools such as satellites and drones shows a great expectation in the water measurement field. These methods can observe a wide area in a short interval time. Nevertheless, remote sensing in water areas greatly depends on sunlight incidence angle and wave intensity on the water surface. Such a method of isolating and quantitatively estimating pollution due to multiple factors has not been established, especially in field-measurement. A spectral reflectance with polarization at visible and near-infrared wavelengths is obtained to solve these problems. Laboratory experiments, field- measurement, water sampling inherent optical properties observation, and satellite data analysis have been conducted. In the laboratory experiment, a wave generator creates artificial waves on the water surface, along with a combination of chlorophyll (biologically originated) and soil particles. Each concentration is estimated from the mixture reflectance spectrum.