【摘要】 深入探究典型草原降水和径流演变趋势和规律,对地区水资源合理配置及利用等工作具有重要意义。基于此,根据锡林浩特市气象站和锡林河水文站实测数据,运用Mann-Kendall法和线性回归法分析了典型草原地区锡林河流域40多年的降水、径流变化特征和演变规律;同时,结合降水频率,对不同水平年降水与径流相关性进行了分析。结果表明,两种评价方法一致认为,降水随时间的变化呈减少趋势,但减少趋势不显著;径流随时间的变化亦呈减少趋势,减少趋势较为显著。另外,不同水平年之间,随降水的增加,典型草原径流增加幅度表现为平水年>丰水年>枯水年。更多还原

【Abstract】 It is important to analyze the variation of the precipitation and runoff in the typical grassland for the rational allocation and utilization of water resources. According to the data from the Xilinhot Meteorology Station and Xilinhe Hydrometry Station, the Mann-Kendall rank correlation method and linear regression method were used to analyze the variation of the precipitation and runoff in the typical grassland area of the Xilinhe River Basin over 40 years. Meanwhile, the correlation between precipitation and runoff was analyzed. The results show that there is a non-obvious decreasing trend of the precipitation, and an obvious decreasing trend of the runoff. In addition, with precipitation increasing, the rate of runoff in-crease shows that normal year > wet year > dry year.更多还原