【作者】 韩松俊； 刘群昌； 杨书君；

【Author】 Han Songjun Liu Qunchang Yang Shujun Department of Irrigation and Drainage,China Institute of Water Resources and Hydropower Research, Beijing 100048,China

【机构】 中国水利水电科学研究院水利研究所；

【摘要】 通过黑河流域及其周边气象站点的气象数据,对比分析了1958～2005年间黑河流域上中下游潜在蒸发变化的不同趋势及气象因子的不同影响。黑河流域上游山区潜在蒸发具有弱增大的趋势,主要表现在辐射项的增大;中下游绿洲潜在蒸发具有显著下降的趋势,主要表现在其空气动力学项的减小。在辐射、气温、风速和相对湿度等气象因子中,气温升高对上游山区潜在蒸发的影响最为显著,而风速下降对中下游绿洲潜在蒸发的影响最为显著。上中下游潜在蒸散发变化的差异反映了自然因素变化和灌溉引水等人类活动影响的不同。更多还原

【Abstract】 The differences in changes in potential evaporation from 1958 to 2005 in the mountainous and oasis regions of the Heihe Basin and the relationships of these changes to meteorological factors were assessed using meteorological data from twelve meteorological stations in and around the study area.The weak increasing trends in potential evaporation were found in the mountainous region,and they were primarily due to the increases in the radiation terms.The decreasing trends in potential evaporation were found in the oasis region, and they were primarily due to the decrease in the aerodynamic terms.The increasing trends in air temperature and solar radiation were the main reason for the increases in potential evaporation in the mountainous regions.The decreasing trends in wind speed were the main reason for the decreases in potential evaporation in the oasis regions.更多还原