Geology and flood hazard analysis by using GIS of Kuala Krai Town, Kuala Krai, Kelantan

The research study is about Geology and Flood Hazard Analysis by Using GIS of Kuala Krai Town, Kuala Krai, Kelantan within the coordinate of 5°:30’46.58” N to 5°:33’30.16” N latitude and 102°:10’17.83” E to 102°:13’0.11” E longitude with the map of scale 1:25 000. The total of study area needs to do the research is 25 km². The objective of this research is to update the geological map, identify the factors that cause flood hazard and producing flood hazard map of the study area. Geological map was update by doing the analysis of secondary data such as terrain map and by previous research. Flood hazard map is important to determine the flood zone area either high or low water level in order to overcome and reduce the risk of flooding. The method used in producing flood hazard map is by using Weighted Overlay Method (WOM) in ArcGIS Software which it overlay all parameters uses in this research according to the influences of the study area. All parameters need to convert in raster data first before overlay method was carried out. The result shows the flood hazard map was categorized into different class which is high, medium, low and very low of water level to differentiate the degree of risk in the study area. This is important to inform and increase awareness of the people in the area about the dangerous of flooding. The factors of flood hazard are the annually raining heavily that naturally occur especially when northeast monsoon seasons within November to March time. Furthermore, it is also due to logging activities that causes water to drain fast into rivers especially in Sungai Kelantan.