Sistem Pengukuran Kecepatan Arus dan Ketinggian Permukaan Air Sungai Bilah Rantauprapat Secara Digital Berbasis Internet of Things (IoT)

Abstract

The high intensity of rainfall in the upstream area of the Bilah Rantauprapat River significantly increases the water discharge, potentially triggering flooding in the downstream area. This study aims to develop a real-time monitoring system for river water level and flow velocity based on the Internet of Things (IoT) as a flood disaster mitigation effort. The system utilizes an ultrasonic sensor HC-SR04 to measure the water surface level with a range of 4.74 to 5.96 meters, and a water flow sensor YFS201 to measure the flow velocity with a range of 0.32 to 1.4 m/s. The data obtained from both sensors are then sent to the ThingSpeak platform via an internet connection and displayed in real-time on an LCD screen. Additionally, the water discharge and volume data are also calculated and displayed to provide more comprehensive information to users. The system testing was conducted three times a day during data collection, at 08.00, 13.00, and 19.00 WIB, to accommodate the fluctuation of water discharge throughout the day. The research results are expected to produce an accurate and efficient monitoring system for providing early warnings of flooding to the surrounding community of the Bilah Rantauprapat River. Therefore, the community can be better prepared to face the potential flood disaster and reduce its negative impacts.