中文摘要：

根据1919-1970年汾河流域近50年器测的水文、气象资料,应用水量平衡的方法,从湖面降水量,入湖径流量和湖面蒸发量等方面,对两千年来不同的历史时段,太原盆地湖泊的水量平衡进行了估算。研究表明：在不考虑湖泊出湖水量的情况下,所有时段太原盆地湖泊水量都处于盈余的状态,所以能够维持存在。如果不考虑入湖径流量,只有先秦时期,水量处于盈余的状态。因此入湖径流量是太原盆地湖泊存亡的决定性因素,湖泊的消亡与汾河改道有直接的关联。由于湖泊来水量逐年减少,导致湖泊不断萎缩,而流出湖盆的径流量却逐年递增。

英文摘要：

Based on the analysis to the hydrologic and metreorological data about Fenhe River during the 50 years from 1919 to 1970,using the theory of volume equilibrium between rainfall,runoff and evaporation,the volume of water in the lakes of Taiyuan Basin was appraised for different periods of the past 2000 years history,the lake water volume of the basin in all periods had surplus regardless of the amount of run out.Therefore,it was concluded that the volume of runoff into the lakes was a decisive factor to surviving or dying of lakes of Taiyuan Basin.The dying of lakes,in turn,related directly to the channel change of Fenhe River.Due to the fall of water supply,the lakes shrank constantly,it was worse that the remaining water kept losing annually in consistence.