1961—2010年庄河地区降水分布特征

Analysis on Precipitation Characteristics in Zhuanghe Area from 1961 to 2010

利用1961—2010年庄河地区的逐月降水量数据,分析庄河地区降水年、季、月分布情况。结果表明,庄河地区近50年来降水特征为降雨量呈微小下降趋势,下降速率为29.83 mm/10年。季节降水变化特征为围绕均值上下波动,夏季降雨量最多,冬季降雨量最少。庄河地区降水月变化呈抛物线变化趋势,1—7月降水量逐月增加,7月降水量最大,达207.6 mm;7—12月降水量逐月减少,12月降水量最小,不足10 mm。

Using the monthly precipitation data of Zhuanghe area from 1961 to 2010, the annual, seasonal and monthly precipitation distributions were analyzed. The results showed that the precipitation decreased at a rate of 29.83 mm per decade in Zhuanghe area in recent 50 years. The precipitation in summer was the highest and the precipitation in winter was the lowest. The monthly precipitation showed single-peak distribution, the precipitation increased from January to July and reached its highest in July （207.6 mm）, and the precipitation decreased from July to December and reached its bottom in Deeember（〈10 mm）.