水利水电技术2018，Vol.49Issue(2)：1-7,7.DOI:10.13928/j.cnki.wrahe.2018.02.001
水文变异对水库汛期分期及汛限水位确定的影响
Influence from hydrological variation on reservoir flood season division and determination of its flood-limited water level
摘要
Abstract
In order to scientifically explore the influence from the hydrological variation on the reservoir flood season division and its flood-limited water level,the hydrological variation is analyzed,and then the mutation year is determined by means of Mann-Kendall,Slide T and Morlet wavelet,etc.in accordance with the runoff data of 53 years from Chengbihe Reservoir in Guangxi.Moreover,the reservoir flood seasons before and after the variation are divided with the method of set pair analysis,while the flood-limited water levels before and after the variationare compared in combination with the sum derived the relevant flood routing as well.The result shows that the runoffseries presents a declined trend with a major cycle of 19 years and the mutation year of 1990.The hydrological variation has a certain influence on the result of the flood season division for the reservoir,of which the main expressions are shortening the duration of the pre-transition period and prolonging the duration of the main flood season.The regulable range of the pre-flood season flood-limited water level is 185 ～ 187 m before the variation,while it is 185 ～187.97 m after the variation,thus the hydrological variation makes the regulable upper limit of the pre-flood season flood-limited water level increased by 0.97 m.Moreover,the regulable range of the post-flood season flood-limited water level is 185 ～ 188 m before the variation,while it is 185 ～ 187 m after the variation,thus the hydrological variation makes the regulable upper limit of the post-flood season flood-limited water level decreased by 1.0 m.It demonstrates that the hydrological variation mainly affects the regulable upper limits of both the pre-flood season flood-limited water level and the post-flood season flood-limited water level,thus no obvious changes are there during the main flood season.关键词
Mann-kendall/滑动T/Morlet小波/集对分析法/水文变异/汛期分期/汛限水位Key words
Mann-Kendall/slide T/Morlet wavelet/set pair analysis/hydrological variation/flood season division/flood-limited water level分类
水利科学引用本文复制引用
莫崇勋,阮俞理,莫桂燕,钟欢欢,孙桂凯..水文变异对水库汛期分期及汛限水位确定的影响[J].水利水电技术,2018,49(2):1-7,7.基金项目
国家自然科学基金资助项目(51569003) （51569003）
广西自然科学基金资助项目(2017GXNSFAA198361) （2017GXNSFAA198361）
广西研究生教育创新计划资助项目(YCSW2017052) （YCSW2017052）
