摘要
为探究渭河下游河道冲淤机理,基于多年原型观测资料,分析上游来水来沙情况、潼关高程变化与渭河下游河道冲淤的响应关系,并探讨预测渭河下游近期的冲淤趋势。结果表明:三门峡水库原型试验以来(2003—2020年),华县站水沙条件和潼关高程抬升仍是引起渭河下游河段淤积的主要原因;渭河下游在1960—2020年总体呈现“上冲下淤”,泥沙淤积重心逐渐上移,2002—2020年渭河全河段冲刷;目前渭河下游河道已经形成均衡的水沙关系和良好的河势布局,在未来的一段时间仍将保持全段冲刷或“上淤下冲”的冲淤状态,继续向维持平衡的冲淤关系发展。研究成果可为渭河下游的规划治理提供参考。
To explore the mechanism of sedimentation and erosion in the lower reaches of the Weihe River,based on multi-year prototype observation data,an analysis is conducted on the upstream inflow and sediment situation,the elevation changes at Tongguan,and the response of sedimentation and erosion in the lower reaches of the Weihe River.The study also discusses the short-term trends in sedimentation and erosion in the lower reaches of the Weihe River.The results show that since the prototype experiment of the Sanmenxia Reservoir(2003—2020),the hydrological and sediment conditions at Huaxian Station and the elevation rise at Tongguan remain the main causes of sedimentation in the lower reaches of the Weihe River.Overall,from 1960 to 2020,the lower reaches of the Weihe River showed a pattern of“upstream erosion and downstream sedimentation”,with the sediment accumulation center gradually shifting upstream.From 2002 to 2020,the entire Weihe River experienced erosion.Currently,a balanced sediment-water relationship and a favorable riverbed layout have formed in the lower reaches of the Weihe River.In the future,the lower reaches of the Weihe River will continue to experience erosion or a pattern of“upstream sedimentation and downstream erosion”,gradually moving towards maintaining a balanced sedimentation and erosion relationship.The research findings can provide references for the planning and management of the lower reaches of the Weihe River.
作者
袁峥
梁林江
范聪
YUAN Zheng;LIANG Linjiang;FAN Congzhe(Shaanxi River and Reservoir Operation Center,Xi’an 710018,China)
出处
《水利建设与管理》
2024年第7期47-52,共6页
Water Conservancy Construction and Management
关键词
渭河下游河道
冲淤影响因素
发展趋势
综合整治
lower reaches of the Weihe River
factors influencing sedimentation and erosion
development trends
comprehensive management
