基于SRI指数的嘉陵江流域 1982-2020年旱涝急转特征分析研究

摘要：

以嘉陵江流域为研究对象，基于北碚水文站1982-2020年月尺度径流数据，计算不同时间尺度的标准化径流指数(SRI)，采用游程理论分析嘉陵江流域的旱涝急转事件特征，并结合Mann-Kendall趋势检验法分析标准化径流指数变化趋势。研究结果表明：嘉陵江流域1982-2009年洪涝化趋势先减弱后增强，2010-2020年呈现短期增强趋势后又减弱。嘉陵江流域1982-2020年的1、5、6、8、11和12月份呈现不明显的干旱化减弱趋势；7、9和10月份干旱化趋势增强，2、3和4月份干旱化趋势显著减弱，北碚水文站旱涝急转事件共发生39次，旱转涝事件急转点集中在4月份，对应旱涝事件的强度也较高。旱涝急转事件近40年发生频率逐步升高，并呈现逐步加重的趋势，应引起足够的重视。

Basing on the monthly runoff data of Beibei hydrological station in the Jialing River Basin from 1982 to 2020, we calculate the different time scales of standardized runoff index(SRl). Using the run-time theory to analyze the drought- flood abrupt alternation characteristic and utilizing Mann-Kendall test to analyze the trend of SRl change in the Jialing River Basin.The results show that: During 1982 to 2009, the trend of flooding in the basin weakened first and then increased, from 2010 to 2020. the trend of fooding inereased for a short period and then decreased again, From 1982 to 2020. there was an insignificant weakening trend of drought in lanuary, May, lune, August, November and December, The trend of drying increased in july, September and Oetober, and deereased significantly in February, March and April, A total of 39 times of drought-flood abrupt alternation events were identified at the Beibei hvdrological station of the Jialing River Basin, The abrupt alteration points of drought-flood abrupt alternation events were concentrated in April and the intensity of drought-flood events was also high. The frequeney of drought-flood abrupt alternation events in near 40 vears has gradually inereased, and shows a trend of gradual aggravation, which should be given sufficient attention.

作者：

徐靖雯，姬广兴，张亚丽

Xu Jingwen，JiGuangxing，Zhang Yali

机构地区：

河南农业大学资源与环境学院；中国科学院新疆生态与地理研究所

引用本文：

徐靖雯，姬广兴，张亚丽。基于SRI指数的嘉陵江流域1982-2020年旱涝急转特征分析研究 [J] . 学报(自然科学版) ,2025,53(3) :42-49. (Xu Jingwen,Ji Guangxing,Zhang Yali.Analysis on the characteristics of drought-flood abrupt alternation in the Jialing River Basin from 1982 to 2020 based on SRI[J] .Journal of Henan Normal University(Natural Science Edition) ,2025,53(3):42-49. DOI:10.16366/j. cnki.1000-2367.2023.11.27.0001.)

基金：

国家重点研发计划项目；河南省科技攻关项目；河南省高等学校智库研究项目；河南农业大学拔尖人才项目

关键词：

标准化径流指数；嘉陵江流域；旱涝急转；Mann-Kendall检验法

standardized runoff index; Jialing River Basin; drought-flood abrupt alternation; Mann-Kendall test

分类号：

P333；TV121

基于SRI指数的嘉陵江流域 1982-2020年旱涝急转特征分析研究.pdf