Analysis of Differences of Rainfall Between Urban, Rural and Mountainous Areas in Yueyang Municipality by Using Regional Intensive Automatic Stations

The precipitation differences between urban, rural, and mountainous areas in Yueyang municipality were analyzed based on the hourly rainfall observation data from 2016 to 2018 at the 9 regional intensive automatic stations. The results showed that there were obviously rain-island effects in the rural region but not in the urban region of Yueyang. The precipitation differences between urban, rural, and mountainous areas were also affected by the region and the interaction of lake and land. But in the years when there was extreme rainfall events, urban areas retained some rain-island effect in months with significant rainfall. The effect of mountain terrain strengthened the rainfall intensity. The frequency of storm was higher in the mountainous areas than urban and rural regions. There was big risk of mountain torrents and debris flow in the eastern mountain areas. Under the situation of heavy rainfall event, there was a small rainfall gap between urban and rural regions in Yueyang, without obviously rain-island effect.Rainfall intensity was slightly strengthened by the hilly land in the rural regions.