新河湖关系下石臼湖水文节律变化及其生态环境效应  

Hydrological Rhythm Change of Shijiu Lake and Its Ecological Effect Under New River Lake Relationship

作　　者：罗俐雅 童建[1] 周杰[2] 庞麦田 王勇[2] LUO Li-ya;TONG Jian;ZHOU Jie;PANG Mai-tian;WANG Yong(Jiangsu Hydrological and Water Resources Survey Bureau,Nanjing 210029,China;Hydraulic Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210029,China;College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China)

机构地区：[1]江苏省水文水资源勘测局,江苏南京210029 [2]南京水利科学研究院水工水力学研究所,江苏南京210029 [3]河海大学水文水资源学院,江苏南京210098

出　　处：《水电能源科学》2023年第11期14-17,共4页Water Resources and Power

基　　金：国家重点研发计划(2022YFC3204102);江苏省水利科技项目(2018001)。

摘　　要：为量化分析长江下游及湖泊水文节律受上游梯级水库开发和三峡工程运用的影响,采用M-K检验、累积距平法、小波相干谱法等水文时间序列趋势分析法和STL等时间序列分解法统计分析了石臼湖蛇山站49年的历史水位资料,解析了石臼湖在新河湖关系下的水文节律的长期变化趋势和规律,探析了水文节律变化和本地气象因子的相干关系和新形势下水文节律变化的生态效应。结果表明,新河湖关系下,枯季更早更长且平均水位更高,极端低水位更易出现,变化更平缓,难以出现高水位;汛期极值高水位更低更晚,汛期平均水位更低,结束更早,变幅更平缓。枯季提前有利于增加水生植物的生物量,但枯季水位变幅减小可能降低枯季生物多样性。In order to quantitatively analyze the impact of upstream reservoirs and the operation of the Three Gorges Project on the hydrological rhythms of the lower reaches of the Yangtze River and lakes,M-K test,cumulative anomaly method,wavelet coherence spectrum method and other hydrological time series trend analysis methods with STL time series decomposition method were used to analyze the 49-year historical water level data of Sheshan Station at Lake Shijiu.The long-term change trend and law of hydrological rhythm of Lake Shijiu under the new relationship between Yangtze River and Lake Shuijiu were analyzed.The coherent relationship between hydrological rhythm changes and local meteorological factors were analyzed along with the ecological effects under the new river-lake relationship.Under the new river-lake relationship,the dry season is earlier and longer and the averaged water level is higher,the extreme low water level is more likely to occur,the variation is gentler,and it is difficult for high water level to happen.The extreme high water level in the flood season is lower and happens later,the averaged water level is lower,ends earlier,and the amplitude is gentler.The early dry season is beneficial to increase aquatic plant biomass,but the decrease of water level variation in dry season may cause biodiversity to decrease.

关 键 词：水文节律 生态效应 石臼湖 时间序列分解 

分 类 号：P343.9[天文地球—水文科学] TV11[天文地球—地球物理学]