Author(s): T. Yamada; T. Hibino; M. Matsuura; G. Fukawa
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Keywords: No Keywords
Abstract: Recently, rainfall and snowfall has been numerically simulated in various scales of space, and these simulation results are used for run off problems in hydrology as input data. In general, for the simulation of precipitation phenomenon, parameterization cloud, water vapor, and rainfall and their formation processes is essential and important. The present authors are carrying out the quasi-prototype experiments of cloud physics by use of a long shaft in a disused mine. By this experiment, we obtained the valuable data regarding to formation of cloud and rain drop. And we checked the validity and applicabality of various parameterization previously proposed by many investigators of cloud physics. For this purposes, we adopted the model of precipitation by Steven and Hobbs (1983), which includes both warm rain and cold rain. Using this model, we carried out the numerical calculation of cold rain in the cases of one and two-dimension. Through one dimensional calculation and comparison with experimented data, a slight modification for parameterization of cloud formation is needed. For two- dimendional calculation, we carried out numerical calculation of precipitation caused by orographic effects. The obtained results are compared with the field data obtaind by the present authors.
Year: 1993