摘要
采用实测资料分析的方法,研究了渭河下游水沙变化特征与河道淤积机理。研究结果表明:1986年以后,渭河下游汛期、非汛期水量均明显减少,但沙量未见相应降低;水沙的不同步变化引起了水流含沙量的相形上升,渭河下游河道淤积明显加重。分析渭河下游河道淤积的主要原因包括:潼关高程的抬高、洪水条件的变化、黄河对渭河的倒灌以及北洛河的来沙。
Field data analysis method is adopted to study water sediment variation features and river channel sedimentation mechanism at low reaches of Weihe River. The research resuhs show that water flow was prominently reduced at lower reaches of Weihe River during both the flood period and the non-flood period since 1986. Water flow sediment content is correspondingly increased due to out-sync variations of water sediment. River channel sedimentation at lower reaches of Weihe River is prominently aggravated. Main reasons of river channel sedimentation at lower reaches of Weihe River are analyzed, including the follows： increase of water level at Tongguan, changes in flood conditions, backward flowing of Yellow River toWeihe River and the incoming sediment from Beiluo River.
出处
《水资源开发与管理》
2017年第8期74-76,共3页
Water Resources Development and Management
基金
国家自然科学基金面上项目(51679260)
国家重点实验室自主课题(泥实验科研07170107)
中国水科院科研专项(泥基本科研KY1785)
关键词
渭河下游
水沙变化
河道淤积
演变机理
潼关高程
lower reaches of Weihe River
water sediment variation
river channel sedimentation
evolution mechanism
water level at Tongguan
