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漓江流域上游径流变化分析

许景璇,代俊峰   

  • 出版日期:2018-05-28 发布日期:2018-05-28

Variation characteristics of runoff in upper reaches of Lijiang River Basin

XU Jingxuan, DAI Junfeng   

  • Online:2018-05-28 Published:2018-05-28

摘要: 利用桂林水文站、大溶江水文站、灵渠水文站的多年实测径流资料,采用统计分析法、Mann-Kendall非参数检验法,分析漓江流域上游径流年内分配和年际变化特征。计算结果表明:漓江流域上游径流年内分配极不均匀,不均匀系数Cn的范围为0.73~0.78;径流年际变化相对比较均匀,且均匀程度相似,变差系数CV值的范围为0.19~0.21,年极值比K的范围为2.53~2.69;1954~2016年漓江流域上游径流量整体呈现上升趋势;桂林水文站在1991年前后发生突变,大溶江水文站在1958,1963年等年份发生突变,灵渠水文站在1968年等年份发生突变。

关键词: 径流, 桂林水文站, 大溶江水文站, 灵渠水文站, 漓江

Abstract: Based on the measured runoff data of Guilin, Darongjiang and Lingqu hydrological stations in the upper reaches of the Lijiang River basin, this paper analyzes the annual and inter-annual runoff variation using statistical analysis method and Mann-Kendall nonparametric test. The results show that the annual distribution of runoff in the upper reaches of the Lijiang River basin is uneven, and the non-uniformity coefficient ranges 0.73 ~ 0.78. The inter-annual variation of runoff is relatively uniform, and the uniformity of the three stations is similar, the variation coefficient ranges 0.19 ~ 0.21, and the annual extreme ratio ranges 2.53 ~ 2.69. The runoff of the upper reaches of the Lijiang River basin has an increasing trend from 1954 to 2016 as a whole and the runoff at Guilin hydrological station mutated in 1991, Darongjiang hydrological station in 1958 and 1963, and Lingqu hydrological station in 1968.

Key words: runoff, Guilin hydrological station, Darongjiang hydrological station, Lingqu hydrological station, Lijiang River