利用区域自动站资料分析岳阳市城郊以及山区降水差异
Analysis of Differences of Rainfall Between Urban, Rural and Mountainous Areas in Yueyang Municipality by Using Regional Intensive Automatic Stations
中文摘要：
利用2016—2018年岳阳地区9个区域自动气象站的逐日降水观测资料对岳阳市城区、郊区以及山区降水差异进行了分析。结果表明，岳阳市城区全年雨岛效应不明显，其影响体现在郊区，城区、郊区及山区的降水差异还受到地形和湖陆效应的影响。但在降水极端性较强的年份，降水明显的月份雨岛效应在城区有一定的体现。山区地形作用对降水强度有明显加强作用，暴雨发生频次山区大于城区和郊区，东部山区山洪泥石流的风险较大。在大强度降水情况下岳阳市城区和郊区降水差距很小，雨岛效应不明显，郊区的丘陵地形使降水稍有增强。
中文关键词：
区域自动站，岳阳市，降水，差异
KeyWords：
regional intensive automatic station, Yueyang, rainfal, difference
Abstract：
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.