摘要
洮河是黄河上游一级支流,近36年来受气候变化和人类活动影响,流域水文要素发生重要变化。在收集洮河流域1980-2015年主要水文要素特征气温、降水、蒸发、径流和泥沙资料的基础上,按不同的年代区间进行统计计算分析,建立以气温距平、降水等值线、蒸发等值面、径流深及输沙模数等值线为分析依据,掌握了主要水文要素在时空上分布特征和变化规律,研究结果表明:流域主要水文要素特征为,不同年代气温升高幅度不同,平均上升幅度在0.6℃~1.0℃。整个流域降水量总体变化趋势表现为减少,蒸发量变化不明显等特点。
Tao River is a tributary of the upper reaches of the Yellow River. In the past 36 years,it has been affected by climate change and human activities. Based on the calculation of temperature,precipitation,evaporation,runoff and sediment data of the main hydrological elements in the Tao River Basin from 1980 to 2015,the statistical analysis was carried out according to different age intervals. It is based on the analysis of the anomalies of temperature anomalies,precipitation contours,evaporation isosurface,runoff depth and sediment transport modulus,holding the distribution characteristics and variation regularity of the main hydrological elements in time and space. The results show that the main hydrological elements in the basin are characterized by different temperatures in different ages,the average increasing in the range of 0. 6 ℃ ~ 1. 0 ℃. The overall trend of precipitation in the whole basin is reduced and the change of evaporation is not obvious.
出处
《地下水》
2017年第3期103-106,共4页
Ground water
关键词
水文要素
时空分布
变化规律
洮河流域
hydrological elements
temporal and spatial distribution
change rule
Tao River Basin
