中文摘要：

基于山东省济宁市6个典型气象站20cm蒸发皿逐月蒸发量、逐年降水量和气象站所在区域的灌溉面积发展资料,研究中国中纬度地区大面积人工灌溉对蒸发皿蒸发量的影响,以揭示人工灌溉发展与蒸发皿蒸发量减少之间的内在关系。分析结果表明：不同时段的蒸发皿蒸发量变化与灌溉面积发展呈现极显著的相关关系,且灌溉期相关程度高于全年和非灌溉期相关程度;地下水为主要灌溉水源区域的蒸发皿蒸发量降幅大于地表水为主要灌溉水源区域的蒸发皿蒸发量降幅。大面积、高强度的农田灌溉引起近地表面的气象因子变化是导致所在区域蒸发皿蒸发量减少的重要原因。

英文摘要：

Using monthly 20 cm pan evaporation data, annual precipitation at six typical meteorological stations in Jining city of Shandong province, and the corresponding irrigated areas data in the same areas, the influence of large-scale irrigation on pan evaporation in mid-latitude region of China was investigated, for revealing the intrinsic relationship between the development of artificial irrigation and the decrease of pan evaporation. The results showed that there was highly significant correlation between pan evaporation data and irrigated areas data at different stages. The correlation in irrigation stage was higher than that in non-irrigation stage or over the whole year. At the same time, the decrease of pan evaporation in irrigated regions using groundwater irrigation was greater than that using surface water irrigation. These results suggest that large-scale, high-intensity irrigation has caused strong influence on the meteorological factors of the near-surface atmosphere, which plays an important role in the decrease of pan evaporation.