Low Cost Method Of Turbidity Estimation Using A Smartphone Application In Cirebon Waters, Indonesia

Abstract

Coastal conditions are closely related to the conditions of rivers and estuaries in the region and changes in the river condition caused by human activities will affect water turbidity. Rivers discharge which carries suspended materials and pollution to the sea have an important role in affecting Cirebon Water turbidity. The aim of this study is to estimate the turbidity using a smartphone application called HydroColor. The study data are obtained in September 2020. This study used Horiba U-10 and HydroColor as a method used to obtain the turbidity data of Cirebon Water. HydroColor is an advancement of technology that can be used to estimate water turbidity. Estimation method using HydroColor is a low-cost method because it only requires a gray card and a HydroColor that is available for iOS and Android for free. HydroColor uses a camera on a smartphone as a 3-band radiometer and produces reflectance values measured by HydroColor. Horiba U-10 data is used as in-situ data and is used to compared to HydroColor data to obtain a correlation between the two data. The results show that the correlation of HydroColor data with in-situ data is 0.91 and HydroColor tends to produce lower turbidity values than in-situ.

Digital innovation in citizen science to enhance water quality monitoring in developing countries

“…The Hydrocolor (Leeuw 2014;Leeuw and Boss 2018) and EyeOnWater 26 (formerly Citclops) apps for measurement of water color, reflectance, and turbidity. Both apps have been tested for use in various water systems in several countries with mixed but promising results (Mahama 2016;Leeuw and Boss 2018;Ouma et al 2018;Yang et al 2018;Jovanovic et al 2019;Ayeni and Odume 2020;Malthus et al 2020;Al-Ghifari et al 2021;Burggraaff et al 2022). Some studies have shown that data collection should be cognisant of potentially confounding environmental variables such as cloud cover and wind speed (Ouma et al 2018).…”

Accuracy and Reproducibility of Above-Water Radiometry With Calibrated Smartphone Cameras Using RAW Data

“…Some use additional fore-optics to measure hyperspectrally (Burggraaff et al, 2020;Stuart et al, 2021), while most use the camera as it is Leeuw and Boss, 2018;Gao et al, 2022). Smartphone science apps are also commonly used for educational purposes and in professional research (Gallagher and Chuan, 2018;Ayeni and Odume, 2020;Al-Ghifari et al, 2021).…”