Geology at Kampung Kuala Geris, Dabong and spatio-temporal analysis of rainfall data in Kuala Krai, Kelantan

This research is about geology and Spatio-temporal analysis of rainfall data to determine the rainfall pattern related to the occurrence of flooding in Kuala Krai, Kelantan. The study area of Kampung Kuala Geris is located at Dabong with coordinates 5°21’53” N to 5°24’20” N and 102°1’50” E to 102°4’50” E. The study area consists of phyllite, slate, quartzite, and alluvium unit from Gua Musang Formation and Stong Migmatic Complex Formation. The study area was dominated by plain, low land, low hill, and hill topographic. The objective of this study is to update the geological map in Kampung Kuala Geris with a scale of 1:25,000 and to identify the rainfall distribution patterns in Kuala Krai. For mapping, the method used to collect the data was by performing the preliminary research related to the area and conducting the geological mapping that consisted of observation and measurement in the field, taking samples, and doing the petrography of the sample to identify the rock type. Besides, the monthly precipitation amounts for water level and rainfall data from the year 2009 to 2020 were obtained from the Department of Irrigation and Drainage (DID). The collected precipitation data were analysis using Mann Kendall Test to see the trend pattern of the data. In addition, interpolation data and Arithmetic Average was used to fill up the missing data. From that analysis, it can be concluded that the huge amount of rainfall intensity is the factor that contributes to the flood event in Kuala Krai, Kelantan.