摘要
收集钱塘江河口闸口、七堡、仓前、盐官4个常规观测站1992—2018年的氯度资料,在分析氯度年际变化特征的基础上,采用季节性肯达尔检验法研究氯度近30 a的变化趋势,并分析氯度变化趋势与径流、潮汐的关系。结果表明,1992—2003年闸口、七堡站秋季的平均氯度年际变幅较大,2003年后平均氯度降低且年际变幅减小,这一现象可能与2003年后上游水库严格执行抗咸调度有关;1992—2018年,钱塘江河口的盐水入侵强度和潮汐强度均呈显著下降趋势,而径流变化趋势不明显,表明盐水入侵强度下降与潮汐强度降低有关。
Based on the chlorinity data from 1992 to 2018 at the four monitoring sites of Zhakou,Qibao,Cangqian and Yanguan in Qiantang River estuary,the interannual variation characteristics of chlorinity were analyzed.The seasonal Kendall test method was used to study the changing trends of chlorinity in the past 30 years,and the relationship between the changing trends of chlorinity,runoff and tides were analyzed.The results show that from 1992 to 2003,Zhakou and Qibao stations experienced a large interannual variation in average chlorinity in autumn,and the average chlorinity and the interannual variation decreased after 2003.This phenomenon may be related to the strict implementation of saltwater resistance scheduling in the upstream reservoir after 2003.From 1992 to 2018,the saltwater intrusion intensity and tidal intensity in Qiantang River estuary showed a significant downward trend,while the changing trend of runoff was not obvious,indicating that the decrease of saltwater intrusion intensity was related to the decrease of tidal intensity.
作者
李若华
夏冬梅
姚凯华
LI Ruohua;XIA Dongmei;Yao Kaihua(Zhejiang Institute of Hydraulics&Estuary(Zhejiang Institute of Marine Planning and Design),Hangzhou 310020,Zhejiang,China;Zhejiang Provincial Key Laboratory of Estuary and Coast,Hangzhou 310020,Zhejiang,China)
出处
《浙江水利科技》
2021年第4期4-8,共5页
Zhejiang Hydrotechnics
关键词
盐水入侵
季节性肯达尔检验
钱塘江河口
saltwater intrusion
seasonal Kendall test method
Qiantang River estuary
