山东黄河挖河试验河段冲淤演变分析  

Analysis of the Fluvial Process of Dredging Test Section in Shandong Reach of the Yellow River

作　　者：刘月兰[1] 张明德[2] 刘景国[2] 杨明[1] 

机构地区：[1]黄委会黄河水利科学研究院,河南郑州450003 [2]山东黄河河务局,山东济南250013

出　　处：《泥沙研究》2000年第6期31-38,共8页Journal of Sediment Research

基　　金：国家自然科学基金及水利部联合资助项目!(5 9890 2 0 0 )

摘　　要：本文分析了山东黄河挖河启动工程实施一年来的河道冲淤演变 ,在水沙条件接近 90年代平均的情况下 ,挖河河段年回淤量占挖沙总量的 5 4 8% ,挖沙减淤比为 1∶0 7左右。对其以上河段也有减淤作用。另外挖槽有吸引流势的作用 ,但没有改变洪水河势。从年内冲淤变化分析 ,挖河河段仍遵循弯曲性河道中过渡段河道洪淤枯冲的冲淤演变规律 ,但挖河使通水初期淤积发展加快 ,相对于不挖河时挖河河段淤积量增多。随着挖河河段回淤及出口以下河段的冲刷 ,挖河河段由淤积平衡转向冲刷 ,非汛期挖河河槽冲刷量较非挖河河段多。根据国内外挖槽回淤率分析 ,优化挖槽深度 。In this paper,the fluvial process of dredging section in Shandong reach is analyzed after one year of the dredging test works conducted.Under the condition of incoming water and sediment amounts in this year is approximate to the average value of 1990s,the annual re\|deposit amount in dredging section takes 54.8% of the total dredging amount, the deposit reduction ratio of sediment dredged to deposited is about 1∶0.7.The effect of deposit reduction on the reach upstream of dredging section also occurred.In addition,channel dredging would slightly affect the river regime,but could not change that of floods.It can be seen from the change of scouring and depositing in this year that there is a law of depositing in high water and scouring in low water existed,as that occurs in the transition section of the meandering river reach.At the initial period of re\|flowing,the channel deposit was quickly developed and the amount of deposition larger than that before occurred.Along with re\|depositing in the dredging section and scouring in its downstream section,the channel of dredged reach changed from deposition equilibrium state to eroded.In the non\|flood season,the scouring amount in dredging section is more than that in non\|dredging section.

关 键 词：挖河固堤 挖沙减淤 河势 过渡段 挖槽回淤率 朱家屋子~CS6 

分 类 号：U616[交通运输工程—船舶及航道工程]