中文摘要：

水量平衡的方法是定量研究古湖泊存亡的有效途径.采用1919-1970年汾河流域近50年器测的水文、气象数据,作为替代资料,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,对不同历史时段,太原盆地昭余古湖的水量平衡进行了估算,并对其驱动因子进行了分析.研究表明,在不考虑湖泊出湖水量的情况下,研究时段昭余古湖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,其余时段均处于亏欠的状态.因此入湖径流量是昭余古湖存亡的决定性因素,它的消亡与汾河改道有直接的关联.

英文摘要：

The method of Water balance is the effective way about the quantitative study of ancient lakesr survival. In this paper, I take the Basin instrumental hydrological and meteorological data as an alternative data from 1919 to 1970 in Fenhe River. From the lake precipitation,running into the lake and lake evaporation, etc, water balance of Zhaoyu ancient lake was estimated and their driving factors are analyxed by the application of water balance method in different historical periods. Studies show that Zhaoyu are in surplus in the studying state without considering the situation outflow the lake water, they were able to maintain existence. If you do not take into ac- count the water of inflow the lake,there is a surplus of water only the pre-Qin period,the remai- ning period are dry state. Therefore the water of inflow the lake is the decisive factor of the survival of the ancient lake and its extinction is directly associated with the diversion of Fenhe River.