# A Real-Time Water Level and Discharge Monitoring Station: A Case Study of the Sakarya River
## 3 Results
### Evaluation of 2023 Hydrological Year Real-Time Monitoring Station Data  
During the verification process of data obtained from real-time monitoring stations, precipitation data serve as a critical reference point. The increase or decrease in precipitation amounts is directly correlated with the river water level and discharge measurements. This verification process allows for a clear understanding of the correlation between precipitation and river flow, serving as an important method for confirming the accuracy of measurement data. Consequently, the reliability of data from monitoring stations is enhanced, and hydrological models can yield more accurate results. The daily precipitation data from the General Directorate of Meteorology's 17,662 meteorological station were compared with the discharge measurements obtained from the real-time river monitoring station. This comparison, as shown in Figure 16, evaluates the sensitivity of the monitoring station data to precipitation changes and the consistency of the relationship between these datasets. Figure 16: River Monitoring Station 2023 Hydrological Year Discharge Variation and Daily Total Precipitation. Figure 15: Comparison of Monthly Discharge Variations. The analysis reveals a significant increase in discharge values during periods of increased precipitation. Notably, the increase in discharge recorded during the precipitation rise in June 2023 provides strong evidence supporting the accuracy and reliability of these data. These findings demonstrate that the measurements obtained from the monitoring station are consistent with the regional meteorological conditions and align well with the basin's characteristics. The impact of runoff from precipitation events on river discharge becomes evident in the subsequent rise of discharge values, as reflected in the hydrograph. This pattern becomes more pronounced in the days following rainfall, and the rise in discharge levels further reinforces the accuracy of the monitoring station's data. While cumulative precipitation is valuable for capturing long-term hydrological trends, the use of daily precipitation data, considering the basin's characteristics, provides a clearer insight into the system's short-term discharge responses. These data are used to more accurately capture the short-term variations in discharge and water levels through real-time monitoring. The water level measurements obtained from the real-time monitoring station were compared with the daily total precipitation, as shown in Figure 17. Increases in water level observed during periods of increased precipitation are significant indicators supporting the accuracy of these data. Especially during periods of intense rainfall, increases in water level values can be observed. For instance, in the autumn months, when the amount of precipitation increases, the discharge and water level also rise. This indicates how responsive the basin is to changes in precipitation amounts and demonstrates how well the real-time monitoring station measurement data align with basin characteristics. Figure 17 illustrates how the daily water levels obtained from the river monitoring station varied across different seasons between September 2022 and August 2023. During the winter months, the water level generally ranges between 1.5 m and 3 m, while in the summer months, it mainly fluctuates between 1.5 m and 2.5 m. The frequent fluctuations of water level between 1 m and 3 m in the spring indicate the impact of melting snow and seasonal precipitation. In autumn,  
Figure 17: Seasonal Water Level Variation in River Monitoring Station and Daily Total Precipitation. similar fluctuation patterns to those in summer are observed, but the water level in winter shows higher averages. The delayed inclusion of runoff into the river following precipitation is clearly observed through increases in the hydrograph. This becomes more evident in the days after the rainfall, where the rise in water levels further reinforces the accuracy of the monitoring station's data.