摘要
采用FAO-Penman—Monteith公式计算了淮河流域参考作物蒸散发的年际、月际变化过程，并通过敏感性系数分析了影响参考作物蒸散发的主要因素。结果表明，淮河流域的参考作物蒸散发呈明显减小趋势，主要集中于20世纪70年代后6～8月，影响参考作物蒸散发的主要因素为平均相对湿度和日照时数，平均每10a相对湿度减小0．5％、日照时数减小0．2h。本文可为合理开发调配淮河流域水土资源、防洪抗旱提供理论依据。
The yearly and monthly change of the reference crop evapotranspiration and its trend in recent 60 years are studied and the sensitive meteorological factor which has important impact on reference evapotranspiration is anayzed. Results show that the reference crop evapotranspiration has been reduced evidently, mainly between 6 and 8 month and after 70s. The critical factors which influenced reference crop evapotranspiration are the mean humidity and time of sunlight. Every 10 years, the humidity reduces 0.5 % and time of sunlight reduces 0.2 h. Although the maximum temperature increases 0. 1‰ every 10 years, but the increasing amount of reference crop evapotranspiration because of the humidity and maximum temperature is less than the decreasing amount because of the time of sunlight, so the reference crop evapotranspiration is the trend of decreasing. The reference crop evapotranspiration is sensitive to the climate change, but the sensitive factor is not the average air temperature,but relative humidity and the time of the sunlight.
出处
《水电能源科学》
北大核心
2009年第6期12-14,44,共4页
Water Resources and Power
基金
水利部公益性行业专项基金资助项目(200701039
200801001)
"十一五"国家科技支撑计划基金资助项目(2006BAC05B02
2007BAC03A06)
关键词
参考作物
蒸散发
敏感性分析
气候变化
淮河流域
reference crop
evapotranspiration
sensitivity analysis
climatic change
H uaihe River basin
