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中文摘要: 介绍了一种以气候适宜降水量为基础的水分距平的计算方法。通过统计一个地区逐月的水分平衡分量,可以计算出该地在气候上适宜的蒸散、补水、径流、失水和降水量,从而得到可以衡量水分盈亏的水分距平值d。这个水分距平作为衡量水分异常的指标可以更好地表现同一个地区同一时期不同年份的水分盈缺情况。应用这种方法计算了北京1961～2 0 0 0年逐月水分距平值,并分析了1月、4月、7月和10月份的逐年水分距平变化
中文关键词: 气候适宜，降水量，水分距平
Abstract:A method for computing the water departure based on the CAFEC(Climatically Appropriate for Existing Condition) precipitation is introduced.Based on a hydrologic budget month to month for one area,the CAFEC quantities for evapotranspiration,recharge,runoff,loss water,and precipitation can be computed, and the water departured can be got.As a index of water abnormity ,the water departure d is more fit for measuring water profit and loss for the same period by years.Using this method,the monthly water departures from 1961 to 2000 of Beijing are computed,and the changes of water departures of January,April,July,and October year by year are analysed.
keywords: CAFEC,precipitation,water departure
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引用文本：
刘巍巍,安顺清,刘庚山,郭安红,2003.以气候适宜降水量为基础的水分距平的计算方法[J].气象,29(4):14-18.
,2003.A Method for Computing Water Departure Basedon CAFEC Precipitation[J].Meteor Mon,29(4):14-18.
刘巍巍,安顺清,刘庚山,郭安红,2003.以气候适宜降水量为基础的水分距平的计算方法[J].气象,29(4):14-18.
,2003.A Method for Computing Water Departure Basedon CAFEC Precipitation[J].Meteor Mon,29(4):14-18.