# Remote Water Quality Monitoring System for Use in Fairway Applications
## 3 Results  
Water quality tests were conducted using the previously described Laboratory Stand for Simulation of Water Environment Conditions, which replicates real environmental conditions (water flow, natural day-night cycle and heater control, and river water). The measurements of the physicochemical water parameters were carried out over a period of more than three weeks (from 11 April 2024 to 5 May 2024). Sensor calibrations were performed on 15 April and 25 April. The graph presented in Figure 7 illustrates the changes in dissolved oxygen levels in the water. The graph may indicate optimal dissolved oxygen (DO) levels (e.g., 7-20 mg/L). Exceeding or dropping below this range can have negative impacts on aquatic life and overall water quality. The graph of dissolved oxygen levels helps assess the water's capacity to support life and its overall quality. Regular monitoring of DO is crucial for protecting aquatic ecosystems, especially in bodies of water exposed to pollution or excessive nutrient production. Figure 8 illustrates conductivity measurements, focusing on analyzing changes in conductivity over time and their impact on water quality. Water conductivity measures  
Figure 6: Sample visualization of water parameters measured. Figure 7: Dissolved oxygen levels in water as a function of time. its ability to conduct electricity, which is directly related to the amount of dissolved salts and minerals in the water. Higher conductivity indicates a greater number of ions, which may suggest the presence of pollutants or minerals. The conductivity graph enables the monitoring of dissolved substances in the water and rapid detection of quality changes. High conductivity typically indicates pollution or elevated mineral levels, while low conductivity suggests cleaner water with minimal salt content. The graph in Figure 9 shows pH values over time, allowing for the assessment of water's chemical stability and the detection of potential pollutants. Optimal pH boundaries (e.g., from 6.5 to 8.5) are marked on the graph to easily evaluate whether the water quality is within the acceptable range. If the pH line exceeds these boundaries, it may indicate potential risks to water quality. It is also important that the pH remains relatively stable within this range to avoid harming aquatic organisms. The pH measurement graph for water quality allows for monitoring its chemical stability and quickly detecting abnormalities that may impact the health of humans, animals, and plants. Regular tracking of pH changes is crucial for maintaining adequate water quality. The graph in Figure 10 presents temperature changes over time. If the temperature line is flat or exhibits minimal variations (as shown in Figure 10, it may indicate stable  
Figure 8: Conductivity of water as a function of time (unit: mS/m). Figure 9: pH levels of water as a function of time. environmental conditions conducive to maintaining suitable water quality parameters. Boundary conditions for temperature were set in the program with a minimum temperature (\(T_{min}\)) of 0 \({}^{\circ}\)C and a maximum (\(T_{max}\)) of 26 \({}^{\circ}\)C. Monitoring temperature trends allows for the detection of potential threats to water quality, as temperature significantly influences aquatic environments. The graphical data present key water quality parameters and their impact on aquatic ecosystems:  
* Dissolved Oxygen: The optimal range is 7-20 mg/L. Levels outside this range can negatively affect aquatic life and water quality. Regular monitoring allows for assessing the water's capacity to support life and detecting pollution or nutrient excess. * Electrical Conductivity: High conductivity indicates pollution or high mineral concentrations. Low conductivity suggests cleaner water with minimal salt content. This enables the rapid detection of water quality changes. * pH Values: The optimal range is 6.5-8.5. Stability within this range is crucial for maintaining the chemical balance of the water and protecting aquatic life.