中文摘要：

基于蒸散发互补相关原理,定量分析和预测了引黄灌溉发展对甘肃景泰灌区年潜在蒸散量的影响。景泰灌区从1972年开始引黄灌溉,年蒸发皿蒸发量和潜在蒸散量随着灌溉引水消耗的增大而减小,其中空气动力学项下降的趋势非常明显,潜在蒸散量的变化主要受到风速下降和相对湿度增大的影响,与引黄灌溉有密切关系。根据互补相关平流-干旱模型分析了年潜在蒸散量随灌区耗水量的变化规律,并在假定年降水量和年潜在蒸散量中辐射项保持多年平均值的情况下,预测了不同耗水量情景下的年潜在蒸散量。

英文摘要：

Changes in potential evapotranspiration will affect the projection of water demand and the determination of irrigation quota in a region.In order to evaluate the influence of irrigation on the maintenance and development of agricultural oasis,the impacts of irrigation on annual potential evapotranspiration in Jingtai irrigation district of Gansu province are quantitatively analyzed and projected using the advection-aridity complementary relationship in regional evapotranspiration.A declined trend has been observed from both annual pan evaporation records and estimated potential evapotranspiration since the introduction of Yellow River irrigation in 1972.The observed aerodynamic forcing has been significantly weakened in the region,and the declined trend in potential evapotranspiration is likely due to the weakening in wind speed and increasing in relative humidity that is affected by irrigation.Future variations in potential evapotranspiration with different water consumptions are simulated using the long-term mean annual precipitation and the solar radiation conditions,and the results are presented.