2017~2019年张家口市不同地区降水量与蒸发量的变化分析

Change Analysis of Precipitation and Evaporation in Different Areas of Zhangjiakou from 2017 to 2019

摘要: 根据2017~2019年中国气象数据网提供的张家口不同站点(张北、蔚县、张家口、怀来)的日降雨和蒸发数据，结果显示，张家口各地区的降雨过程主要发生在7~8月，而蒸发过程主要集中在4~6月。夏季降水量最大，冬季降水量最小，春季蒸发量最大，冬季蒸发量最小。四季蒸发量均大于降雨量，各地区春季蒸发量均明显大于降雨量。年平均降雨量与蒸发量差值为负，其中蔚县差值最小，张北、张家口、怀来站年平均差值无差异。

Abstract: According to the daily rainfall and evaporation data of different stations in Zhangjiakou (Zhangbei, Weixian, Zhangjiakou, Huailai) provided by the China Meteorological Data Network from 2017 to 2019, the results show that the rainfall process in Zhangjiakou regions mainly occurs in July and August, while the evaporation process is mainly concentrated in April and June. Summer precipitation is the greatest, winter precipitation is the smallest, spring evaporation is greatest, and winter evaporation is minimal. The evaporation in all seasons is greater than the rainfall, and the spring evaporation in each region is significantly greater than the rainfall. The difference between the average annual rainfall and evaporation is negative, of which the difference between WeiXian is the smallest, and the annual average difference between Zhangbei, Zhangjiakou and Huailai stations is unchanged.