Simulation of Wind Field and Rainfall in Catchment Area

Abstract

In this paper, the results of the field observation of rainfall which had been carried out by the authors, are shown and the effects of height or direction of the mountain on rainfall are discussed. With these investigation, we calculate the wind field in mountanous area by using the digital maps and spectral analysis. Combining the calculated wind field and the Kessler's model for rainfall, we simulate the precipitation field in mountanous area. Comparing the observed data and calculated rainfall pattern, we confirm that the above-mentioned calculation can simulate the actual orographic effect of rainfall precisely.