水利学报Issue(2)：150-162,13.DOI:10.13243/j.cnki.slxb.2014.02.004
黄河小北干流和渭河下游淤积过程模拟
Simulation of sedimentation processes of the Xiaobeiganliu reach of the Yellow River and the lower Wei River
摘要
Abstract
Based on the analysis of the impact factors and the mechanisms of the fluvial processes of the Xiaobeiganliu reach of the Yellow River and the lower Wei River (LWR),it’s assumed that the channels reach in their potential equilibrium states,compared to the initial boundaries,have a deposition body with a triangular longitudinal shape determined by the variation of Tongguan elevation ΔZ, initial channel bed slope J0 and the potential equilibrium slope Je. Using the delayed response model and an equation devel-oped for calculating the volume of triangular deposition body,a method for simulating the deposition process-es of the river reaches has been proposed. The coefficients in the method were determined using the data during 1960 and 2001,and the applicability of the method was verified using data during 2002 and 2011. The results show that the method takes into account the effects of both Tongguan elevation and water and sediment conditions,and it better reflects the mechanism of channel adjustment and has higher calculation accuracy than previous methods which consider only the impact of Tongguan elevation on channel aggrada-tion and degradation. In addition,based on the actual incoming water and sediment volumes during 1960 and 2011,it’s estimated that the accumulated sediment deposition volumes of the Xiaobeiganliu and LWR will decrease some 0.51 and 0.27 billion m3 on average with Tongguan elevation lowering by every 1 m. It’s indi-cated that the Tongguan elevation had main influence over the long-term evolution of the channel reaches, while the lowing of Tongguan elevation and the favorable water and sediment conditions have played fairly the same important roles in the channels’ degradation since 2003 when an operation scheme of Sanmenxia Reservoir was initiated to prevent the pool level from exceeding 318 m during non-flood seasons. The com-bined impacts of Tongguan elevation and income water and sediment conditions on the recent adjustment of the river reaches are obvious.关键词
黄河小北干流/渭河下游/潼关高程/水沙变化/淤积/滞后响应模型Key words
Xiaobeiganliu/Lower Weihe River/Tongguan elevation/water discharge and sediment load/channel aggradation/delayed response model分类
建筑与水利引用本文复制引用
郑珊,吴保生..黄河小北干流和渭河下游淤积过程模拟[J].水利学报,2014,(2):150-162,13.基金项目
国家“十二五”科技支撑计划课题（2012BAB02B02）；国家重点基础研究发展计划课题（2011CB403304）；水沙科学与水利水电工程国家重点实验室开放研究基金资助课题 （）
