Hydrological monitoring focuses on real-time tracking of parameters include: Hydrological Parameters: Water level, flow velocity, discharge, and precipitation. Water Quality Indicators: pH, dissolved oxygen, COD, ammonia nitrogen, heavy metals, etc., Environmental Data: Water quality, air quality, and soil moisture to support ecological analysis. Main devices: water level meter, flow meters, rain gauges, and multi-parameter water quality sensors. Applications: Flood Control: Real-time water level and rainfall monitoring; Water Resource Management: Reservoir for agricultural and urban water supply Pollution Prevention: Tracking industrial discharges and water quality anomalies Urbanlogging: Monitoring water level and report to traffic department.