摘要
对桃汛期潼关高程变化的分析表明,桃汛洪水对潼关高程的冲刷作用与水流条件和坝前水位密切相关,但存在一极限条件当洪峰流量小到某一值时对潼关河床的冲刷作用微弱,起调水位降低并不能无限制增加洪水对潼关高程的冲刷作用。1999年以后受万家寨水库蓄泄水的影响,洪峰流量削减,洪水过程发生变化,对潼关高程的冲刷作用减弱。
The action of spring flood on erosion of Tongguan elevation is closely related to the flow discharge and water level at Sanmenxia dam.However,the erosion in the Tongguan reach is faint when the flood peak discharge decrease to a certain value, and the action on the Tongguan elevation through lowering the beginning water level at the dam is limited. Affected by the operation of Wanjiazhai reservoir since 1999,the erosion of Tongguan elevation is weaken with the spring flood peak discharge decreased greatly and its process changed.
出处
《泥沙研究》
CSCD
北大核心
2005年第1期53-56,共4页
Journal of Sediment Research
关键词
桃汛洪水
潼关高程
起调水位
万家寨水库
spring flood
Tongguan elevation
beginning water level of spring flood
Wanjiazhai Reservoir
