人民黄河2024，Vol.46Issue(10)：28-32,37,6.DOI:10.3969/j.issn.1000-1379.2024.10.005
黄河下游近期来水来沙年内年际波动特征研究
Study on the Annual Variations and Intra-Annual Distributions of Incoming Water and Sediment in Lower Yellow River
摘要
Abstract
In order to explore the new regime of water and sediment in the Lower Yellow River in recent 20 years,based on the measured da-ta from 1997 to 2020 at Huayuankou Station,and compared with the water and sediment data at Tongguan Station in the same period,the an-nual fluctuation characteristics of incoming water and sediment in the Lower Yellow River were systematically analyzed from five aspects of trend,variability,periodicity,annual distribution and water-sediment collocation.The results show that the overall trend of runoff and sedi-ment load at the two stations from 1997 to 2020 is a notable increase and a significant decrease respectively.The amount of water and sedi-ment in Tongguan mutates around 2018 and 2004 respectively.Meanwhile,the amount of water and sediment in Huayuankou mutates signifi-cantly in 2017 and 2001-2002 respectively.The main cycles of water and sediment at Tongguan Station are 14 and 13 years respectively,with an average cycle of about 9.5 years.The main cycles of water and sediment at Huayuankou Station,on the other hand,are 13 and 12 years respectively,with an average cycle of about 8 years.Based on the above analysis,the study period of 1997-2020 can be divided into five phases.The intra-annual distribution inhomogeneity of the flow at the two stations during the five phases is similar,both experienced an alternating process of decreasing-increasing,while the intra-annual distribution of the sediment concentration differs in the phases.At Tong-guan Station,the incoming sediment coefficient ξ decreases while the water-sediment coefficient K increases with each stage.On the other hand,at Huayuankou Station,the incoming sediment coefficient ξ decreases in the first four stages and rebounds in the V stage,while the water-sediment coefficient K remains small in the first two stages and increases from Ⅱ to Ⅳ stages before decreasing in the Ⅴ stage.Under the combined effect of the changes in the natural incoming water and sediment process and the artificial water and sediment regulation,the water-sediment process has been characterized by obvious stage changes,and overall,the water-sediment conditions have been improved rela-tively in the past 20 years.关键词
水沙条件/趋势性/水沙搭配/游荡段/黄河下游Key words
water and sediment regime/trend/water-sediment collocation/wandering river reach/Lower Yellow River分类
建筑与水利引用本文复制引用
韩沙沙,孙苏雨,刘百川,窦宇航,赵连军..黄河下游近期来水来沙年内年际波动特征研究[J].人民黄河,2024,46(10):28-32,37,6.基金项目
国家自然科学基金青年项目(52109086) （52109086）
国家自然科学基金黄河水科学研究联合基金资助项目(U2243219) （U2243219）
黄河水利科学研究院基本科研业务费专项(HKY-JBYW-2022-03) （HKY-JBYW-2022-03）
