水利水电技术2018，Vol.49Issue(2)：117-123,7.DOI:10.13928/j.cnki.wrahe.2018.02.018
黄河宁夏段近期水沙变化及河势演变分析
Analysis on recent water-sediment variation and river regime evolution of Ningxia section of Yellow River
摘要
Abstract
In order to study the water-sediment relation and the river regime evolution of Ningxia section of the Yellow River,the characteristics of the recent water-sediment variation of the river section is analyzed through the measured data,while the status of the river regime is analyzed and assessed in combination with the topographic mapping and the drawing of large-sized cross-section made from 1993 to 2015 for the river section.The result shows that the water-sediment relation of Ningxia section of the Yellow River mainly exhibits the following characteristics:remarkable decrease of the water-sediment amount,a large change of the distribution proportion of the yearly water amount,a large change of the sediment-incoming coefficient,etc.In recent years,a larger change of the river-line is there for Ningxia section of the Yellow River,i.e.the river bank of the river section above Rencun Ferry is gradually narrowed,but the main river channel is not largely shifted,while the river bank of the river section below Rencun Ferry tends to be expanded and the main stream is violently shifted.In the aspect of the variation of river morphological relation,the variation of the river regime coefficient of Xiaheyan-Qingtongxia river section is not largely changed and its cross-section remains with a deep and narrow status,while the river regime coefficient of Qingtongxia-Shizuishan river section generally presents an enlarging trend along with the silting up of the main river channel year by year and the cross-section therein tends to be more wide and shallow.During 2011 ～2012,the 2012 Flood makes the river channel scoured and the cross-section deepened,thus leads to the decreases of the river regime coefficients for both Xiaheyan-Qingtongxia river section and Qingtongxia-Shizuishan river section.It is analyzed from the variation of the relation between river rapids and channel that the difference of 1 ～ 2 m between river rapids and channel is the lager range of the deviating displacement of the main river channel,and then the larger the difference between river rapids and channel is,the smaller the deviating displacement of the main river channel is to be and the more difficult the shifting of the river regime is to be as well.关键词
黄河/宁夏段/水沙变化/河势演变Key words
Yellow river/Ningxia section/water-sediment variation/river regime evolution分类
建筑与水利引用本文复制引用
岳志春,马晓阳,田福昌..黄河宁夏段近期水沙变化及河势演变分析[J].水利水电技术,2018,49(2):117-123,7.基金项目
国家自然科学基金重点项目(51379003) （51379003）
