近30年海南不同地区降雨量和蒸发量分布特征研究

利用海南省气象局提供的1974—2004年气象资料和2005年出版的《海南省志》中《水利志》部分的降雨量和蒸发量数据，对海南省不同地区近30年的平均降雨量和平均蒸发量特征进行了研究。结果表明，海南省各个地区降雨过程主要发生在8—10月，而蒸发过程主要集中于5—7月。春季和冬季的蒸发量明显大于降雨量，夏秋两季除南部和西部地区蒸发量明显高于降雨量外，其它地区都是降雨量大于蒸发量。而年降雨量只有东部和中部地区大于年蒸发量，南部、北部和西部地区都是年蒸发量大于年降雨量。

Characteristics of Rainfall and Evaporation of Different Region in Recent 30 Years in Hainan Province

The characteristics of rainfall and evaporation in different regions in recent 30 years in Hainan Province were researched in this paper according to the weather data in 1974 to 2004 by offered the weather bureau of Hainan provence and the data of rainfall and evaporation in the weather bureau of Hainan Province which belonged to one chapter of the publication of annals of Hainan Province by published 2005.The results indicated that the rain mostly occurred in the month of 8 to10 and the evaporation mostly occurred in the month of 5 to 7, the evaporation is obviously more than the rainfall in spring and winter and the rainfall is obviously more than the evaporation in summer and autumn except the south and the west which the evaporation is more than the rainfall in most regions of Hainan Province. The results indicated that the average rainfall of one year is more than the average evaporation of one year in east and center and the average evaporation of one year is more than the average rainfall of one year in south, north and west region of Hainan Province.