摘要
基于Mann-Kendall检验法对北运河流域近51年的降水量和径流量变化趋势和突变特征进行分析,结果表明:(1)北运河流域多年平均降水量为544.33 mm,多年平均径流量为5.021亿m^(3);(2)北运河流域降水量的年内分配存在极大的不均匀性,径流量年内分配差异不明显;(3)北运河流域在年际尺度上径流量和降水量均呈上升趋势;在季际尺度和月际尺度上,径流量和降水量的变化趋势各异;(4)1970—2020年,北运河流域降水量和径流量突变特征出现差异。本研究对分析近51年水文情势变化趋势具有重要的参考价值。
The variation trend and mutation characteristics of precipitation and runoff in the North Canal basin in recent 51 years are analyzed based on Mann-Kendall test method.The results of this study are:(1)the average annual precipitation of the North Canal basin is 544.33 mm,and the annual average runoff is 502.1 million m^(3);(2)the annual distribution of precipitation in the North Canal basin is very uneven,and the annual distribution difference of runoff is not obvious;(3)the runoff and precipitation in the North Canal basin showed an upward trend on the interannual scale;the variation trends of runoff and precipitation are different on seasonal and monthly scales;(4)the abrupt characteristics of precipitation and runoff in the North Canal basin were different from 1970 to 2020.This study has important reference value for analyzing the change trend of hydrological situation in recent 51 years.
作者
王玉雪
李波
王槿妍
赵小伟
张欣
王阳
范庆莲
WANG Yuxue;LI Bo;WANG Jinyan;ZHAO Xiaowei;ZHANG Xin;WANG Yang;FAN Qinglian(Beiing Hydrological Center,Beijing 100089,China)
出处
《北京水务》
2022年第1期24-28,共5页
Beijing Water
