Development of Rainfall Model using Meteorological Data for Hydrological Use

At present, research on forecasting unpredictable weather such as heavy rainfall is one of the most challenges study for equipped meteorological center. The incidence of significant weather events is estimated to increase in the near future due to climate change, and this required more studies to be done. This study has developed a rainfall model using selected rainfall parameters with the aim to estimate the rainfall depth in a catchment area. Rainfall model was developed using rainfall, temperature, humidity and pressuredata taken from selected stations in Peninsular Malaysia and these data were analyzed using multiple regression model. Seven meteorological stations are selected for data analysis which is from 1997 until 2007 which are Senai, Kuantan, Melaka, Subang, Ipoh, Bayan Lepas, and Chuping. Based on statistical results, Senai rainfall model shows the most reliable result compared to other stations and this model was validated with data from Kota Tinggi station. The analysis shows that the selected meteorological parameters were influence the rainfall development. As a conclusion, the rainfall model developed for Senai can be used in Kota Tinggi catchment area because these two stations located in the same regional boundaries. The amounts of rainfall at the Senai and Kota Tinggi stations was compared and calibrated and was statistically prove that the rainfall model can be used at both areas.