巢湖流域蒸发量特征及变化趋势研究

巢湖作为安徽省境内的一个重要湖泊，对安徽省生态环境起到一定的影响作用。蒸发量是影响生态环境的重要因子，在很多方面是该区生态环境的一个反映。采用了统计学方法，对巢湖流域15个蒸发点20年（1981-2000年）的资料进行了分析，初步探讨了巢湖流域的蒸发量空间分布特征与地势、气温、风速、降水量等因子的关系，以及蒸发量在1年内的变化特征和年际变化趋势，试图说明研究时段内人类活动对区域蒸发量的影响。研究表明，由于地形等因素的影响，巢湖流域的蒸发量空间分布不均衡，在研究时段内蒸发量大体呈上升趋势。

Study on Features of Chaohu Lake Basin's Evapotranspiration and Trend of Its Variation

As a major lake in Anhui Province, Chao Lake played an influential role in its ecological environment. Evapotranspiration, as an essential element influencing ecological environment, was a reflection of the ecological environment in many aspects. Mining at illustrating how the regional evaporation capacity was affected by human activities, this paper, by adopting statistics method, analyzed the materials covering fifteen evapotranspiration sites in Chao Lake Valley spanning twentity years from 1981 to 2000, and then explored the relationship between the features of spatial distribution of evapotranspiration and relief, temperature, wind velocity, the amount of precipitation and other factors, as well as on the characteristics of evapotranspiration variation within a year and the trend of its annual changes. The results indicated that due to the factors like relief, the evaporation capacity of Chao Lake Basin was unbalanced in spatial distribution and appears to be on the rise on the whole during the period under discussion.