Conceptual Design for Flood Warning Study at Recreational Area—Case Study Gunung Pulai Mountain, Johor, Malaysia

Abstract

It is important to conduct detail hydrological study at recreational area located at mountain sides. This is due to the fact that the geographical location and topographical conditions may post a risk of landslide dam outburst flood (LDOF). As a case for Gunung Pulai Recreation Area located at the foot hills of Gunung Pulai Mountain to be opened to public, a detail hydrological study needs to be carried out. The purpose of this study is to establish the preliminary baseline information on hydrological characteristics of the study area and to assess and analyse the existing hydrological parameter that can potentially cause flash flood within the recreational area. Then, proposing a long-term engineering solution towards prevention loss. A study area potential to be exposed to the LDOF within the recreational area needs to be determined. Hydrologic modelling is conducted to get a better understanding of the parameters in the study area. Rain gauge and water level were inserted at certain elevation level of the study area were conducted to provide the hydrological parameters needed to estimate the relationship between the rainfall and water level. Data obtained from the rain gauge and water level were plotted. The relationship between rainfall and water level is imperative to show the time needed for an alarm to be triggered. In conclusion, the parameters that can potentially indicate the occurrence of flash flood has been analysed and can be altered to make them useful against future flash flood events. A long-term solution has also been devised and ready to be deployed.