淮河干流六坊堤段河道河势变化分析  

Analysis of River Regime Changes in Liufangdi River Section of Main Stream of Huaihe River

作　　者：张震 ZHANG Zhen(Anhui Provincial Water Resources Department Planning Office,Hefei 230022,China;Anhui Survey&Design Institute of Water Resources&Hydropower Co.,Ltd,Hefei 230088,China)

机构地区：[1]安徽省水利厅,安徽合肥230022 [2]安徽省水利水电勘测设计研究总院有限公司,安徽合肥230022

出　　处：《人民珠江》2022年第11期122-131,共10页Pearl River

摘　　要：为分析水文气象变化、河道整治、人工采砂等对淮河干流河势变化影响,选取复杂的六坊堤段分汊河道为研究对象,基于1951—2020年实测流量及泥沙资料,六坊堤段河道1971、1979、1992、2005、2012、2019、2020年等不同年份的实测断面资料,采用MIKE 11数值模型等方法,研究并量化分析淮河干流六坊堤段河势变化情况。经分析,河道来沙量、河道深泓、分汊河道分流比、河道断面均发生明显变化,其中河道来沙量由50年代减少了80%~90%,河段深泓显著下降,河段主汊向南汊演变加强,河道断面扩大明显,1971—2020年河段总冲刷量达6 908万m^(3)。In this paper, in order to analyze the effects of hydrometeorological changes, river improvement, and artificial sand mining on river regime changes in the main stream of the Huaihe River, the complex and branching Liufangdi river section was studied. In addition, this paper collected the measured flow rate and sediment data from 1951 to 2020 and the measured sectional data in different years including 1971,1979,1992,2005,2012,2019,and 2020 and used MIKE 11 numerical models and other methods to study and quantify the river regime changes in the Liufangdi river section of the main stream of the Huaihe River.According to the analysis, it was found that the river sediment inflow, river thalweg, diversion ratio of the branching river section, and river section all change significantly.The river sediment inflow has decreased by 80%~90% since the 1950 s, and the river thalweg has sharply dropped.The main branch of the river section strongly evolves to the south branch, and the river section expands obviously, with the total amount of river erosion reaching 69.08 million m^(3) from 1971 to 2020.

关 键 词：水文泥沙 分流比 深泓 冲淤量 淮河 

分 类 号：P333.4[天文地球—水文科学]