摘要
淮河中游河道与洪泽湖的水沙交换程度影响着河湖之间的内在关系,通过计算淮河与洪泽湖1975-2015年的水沙交换指数,利用多种统计检验交叉互补的方法,对河湖水量交换指数和泥沙交换指数进行了趋势变化、突变检验及周期性分析。结果表明:受不同年代治淮工程的影响,河湖水量交换指数整体而言呈不显著增大趋势,造成洪泽湖库容呈不显著增大趋势;入湖泥沙量大于出湖泥沙量,湖盆泥沙的淤积量逐年呈不显著增大趋势。洪泽湖库容及湖盆淤积在研究时期内呈稳定的波动状态,未发生较为显著的突变现象。淮河干流与洪泽湖的水沙交换程度存在多时间尺度的周期性特征,均以14a为第一主周期,河湖水沙交换程度处于相对稳定的状态。研究结果阐明了淮河中游河道与洪泽湖的水沙作用关系,可为河湖治理提供理论参考。
The water and sediment exchange status between the middle reaches of Huaihe River and the Hongze Lake affects the intrinsic relationship between the river and lake.Based on the calculation of the water and sediment exchange indexes between Huaihe River and the Hongze Lake from 1975 to 2015,a variety of statistical tests were carried out for the trend variation,abrupt change test and periodic statistics analysis of the indexes.The results show that,affected by the Huaihe River regulation projects built in different ages,the water exchange between the river and lake generally showed an insignificant increasing trend,resulting in an insignificant increasing trend of the reservoir capacity of the Hongze Lake as well.Sediment into the lake was more than that out of the lake,and sediment deposition in the lake basin increased insignificantly year by year.However,the reservoir capacity and basin deposition of the Hongze Lake fluctuated stably during the study period,and there were no obvious abrupt changes.The water and sediment exchange degree between the Huaihe River and Hongze Lake showed multi-time scale periodic characteristics,with 14a as the first principal period.The water and sediment exchange degree between the river and lake was in a relatively stable state.The research results clarified the water and sediment interactive relationship between the middle reaches of Huaihe River and the Hongze Lake,which could provide a theoretical guidance for river-lake governance.
作者
段宇
徐国宾
DUAN Yu;XU Guobin(Key Laboratory of Engineering Sediment,Tianjin Research Institute for Water Transport Engineering,Ministry of Transport,Tianjin 300456,China;State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China)
出处
《水资源与水工程学报》
CSCD
北大核心
2022年第4期117-124,共8页
Journal of Water Resources and Water Engineering
基金
国家重点研发计划项目(2017YFC0405602)。
关键词
河湖水沙交换
趋势分析
突变检验
周期统计
淮河中游河道
洪泽湖
water and sediment exchange between the river and lake
trend variation
abrupt change test
periodic statistics
the middle reaches of Huaihe River
the Hongze lake
