| 摘要: |
| 利用器测折算法与气候模式法,分别计算鄱阳湖周围康山、棠荫、都昌、星子、湖口5站的单站水面蒸发量,以5站两种方法计算值的平均值代表鄱阳湖大湖面的水面蒸发量,求得鄱阳湖1955-2004年各月的水面蒸发量和蒸发水量,结果为:多年平均年蒸发量1081.2 mm.年蒸发水量27.06×108 m3.对年、月水面蒸发量在近50年来的变化趋势进行了分析,表明除5月份外,其他各月蒸发量和年蒸发量均呈逐渐减少趋势,年蒸发量平均每年减小2.79 mm,年蒸发水量平均减少0.05×108 m3,对湖区水资源持续利用和湖泊环境将产生明显影响.对水面蒸发量递减原因进行了初步探讨. |
| 关键词: 水面蒸发量 变化趋势 气候变化影响 鄱阳湖 |
| DOI：10.18307/2006.0502 |
| 分类号: |
| 基金项目:鄱阳湖生态环境与资源研究教育部重点实验室开放基金项目(PK2004017) |
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| Calculation of lake evaporation and trend analysis of Lake Poyang;1955-2004 |
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MIN Qian1, LIU Ying2
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1.Hydrological Bureau of Lake Poyang, Jiangxi Provine, Jiujiang 332800, P. R. China;2.Key Laboratory of Eco-environment and Resovrces of Lake Poyang, MOE, Jiangxi, Narmal universify, Nanchang 330027, P. R. China
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| Abstract: |
| Lake evaporations of Kangshan, Tanyin, Duchang, Xingzi and Hukou Stations in adjacent Lake Poyang are calculated individually by using instmmental reduction method and climatic model. The mean of the calculated results of the two methods calculations in 5 stations couJd be regarded as the lake evaporation in Lake Poyang. In 1955-2004, the average evaporation of Lake Poyang reached an annual 1081.2 mm and evaporative quantity of 27. 06 ×108 m3. In addition, the trend of yearly and monthly evaporation were analysed, ie. a gradual decrease of evaporation in the past 50 years was noticed except for May, with an annual dropdown of 2.79 mm and a quantity of 0.05 ×108 m3, which could have great impact on the utilization of water resources and aquatic environment in lake districts. Finally, possible reasons are suggested. |
| Key words: Lake Poyang evaporation trend analysis climatic impact |
