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基于1958～2008年北京和天津两地区水文站和气象站气象资料,采用彭曼公式计算了潜在蒸发量,并分析了变化趋势及气象各因子的影响。结果表明,气象要素变化趋势对年、季尺度的潜在蒸发影响有着规律性变化,影响北京、天津两地区蒸发的主要气象要素为相对湿度和风速,为研究区域水资源开发利用提供了参考。
Based on the meteorological data of hydrological stations and meteorological stations in Beijing and Tianjin from 1958 to 2008, the potential evaporation was calculated by the Penman formula, and the change trend and the influence of meteorological factors were analyzed. The results show that the trend of meteorological elements has a regular change on the potential evaporative effects on annual and seasonal scales. The main meteorological elements influencing the evaporation in Beijing and Tianjin are relative humidity and wind speed, which provide a reference for the development and utilization of regional water resources.