Abstract: Using the rainfall data of 2 005 regional automatic meteorological observation stations and 82 National weather stations in Hubei province for the past three years, combined with the longitude, latitude, height, slope, and slope of the digital elevation data（DEM）, precipitation and terrain factor models were established in eight regions. Compared with the spatial interpolation distribution of actual precipitation, the trend was relatively consistent. The accuracy of the model simulated precipitation was 89.5%, and the model can better reflect the actual precipitation situation. From the results of simulation, the annual precipitation in most parts of Hubei province was between 600 and 2 100 mm, and its distribution trend increases from north to south. The three regions of southwestern Hubei, southeastern Hubei, and northeastern Hubei were the regions with the most precipitation. Considering the factors such as mountain area, latitude and longitude, the simulated annual precipitation in the mountain area was obviously larger than that of the precipitation distribution based on the national weather station data only, in which the precipitation in the southeast of Hubei was 200~300 mm larger, more than 300~400 mm in southwest Hubei and about 300 mm in northeast Hubei. In particular, the precipitation distribution model of Hubei province can reflect the characteristics of precipitation in high altitude areas significantly higher than the surrounding low-altitude areas.

Key words: precipitation, geographical information, mountainous areas, distribution characteristics