长仁河流域降水径流时间序列趋势变化特征分析

Analysis of variation characteristics of precipitation runoff time-series trend for Changrenhe river basin

文章运用M-K秩次相关检验法和M-K突变趋势检验方法,对长仁河流域降水量、径流量时间序列进行了趋势分析和突变点检测,并结合滑动t突变检验法确定突变年份。从分析的结果来看,长仁河流域下垫面保持完整,生态环境良好,降水和径流趋稳定,有利于下游水库蓄水和海兰灌区水田灌溉。

Based on the M-K rank correlation test method and the M-K mutation trend test method, the paper analyzes the trend and detects the mutation point for the time-series of the precipitation and the runoff in Changrenhe river basin, and the mutation year is determined combined with the slide t mutation test method.The analysis results show that the Changrenhe river has the complete underlying surface, the good ecological environment and the near stable precipitation and runoff, which is beneficial to the store water of the lower reservoir and the paddy field irrigation of Hailan irrigation area.