Abstract
Spending time at recreational forests or river is always exciting and relaxing. However, the unpredictable power of the nature can sometimes be life threatening towards the people and surrounding area. One of the most common life threatening phenomenons at river spot is the headwater phenomenon. The sudden and rapid rise of water volume and velocity at the upper-side of the river may causing the people at the lower-side of the river to be involved in high water rise which may cause them to drown or drifted away to the river bed. On top of that, there is no monitoring system or alert provided at the river spots except for manual scheduled monitoring done by the Forestry Department which may consume more manpower and time to monitor and provide the alert. Therefore, Headwater phenomenon warning and monitoring system which is an Internet of Things (IoT) and mobile application system was developed in order to provide early alert to people in the surrounding of rivers or recreational forests. The system can provide real-time monitoring of headwater events and water level besides providing warning both on-site and on applications for user notification.