关键词: 气温, 蒸发, 降水, 降蒸差

Abstract: The ground evaporation,temperature and precipitation are important parameters for estimating the water resources.By using the data of month mean temperature and month precipitation in 1959-2006 from seven meteorological stations in Tangshan,the characteristics of atmospheric temperature and precipitation changes was analyzed.The land evaporation empirical equation of Takahashi's Equation was applied to estimate evaporation,water resources and other parameters related to water resources.The results showed that the temperature increased significantly in Tangshan since 1995.The linear trend of the increasing temperature was with 0.3℃ per decade.The seasonal distribution of precipitation,evaporation and available water resources was in accordance with the monthly distribution.The precipitation and water resources varied greatly in different year.The anomaly precipitation was between-260.3 mm and 384.9 mm with a decreased trend.The evaporation did not change obviously with anomaly evaporation between-127.4mm and47.1mm,and its inter-annual value was rather steady.The risks of the future droughts and floods in the region still existed and water resources shortage was one of the faced challenges.

Key words: Temperature, Temperature, Evaporation, Precipitation, Difference of precipitation to evaporation