### 友情链接

 引用本文: 韩其为.论水库的三角洲淤积(二).湖泊科学,1995,7(3):213-225. DOI:10.18307/1995.0303 Han Qiwei.Delta deposition in reservoir (Ⅱ). J. Lake Sci.1995,7(3):213-225. DOI:10.18307/1995.0303
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
 ←前一篇|后一篇→ 过刊浏览    高级检索
 本文已被：浏览 6034次   下载 3399次 码上扫一扫！ 分享到： 微信 更多 字体:加大+|默认|缩小- 论水库的三角洲淤积(二) 韩其为 水利水电科学研究院, 北京 100044

DOI：10.18307/1995.0303

Delta deposition in reservoir (Ⅱ)
Han Qiwei
China Institute of Water Resources and Hydropower Research, Beijing 100044
Abstract:
There exist three typical profiles of sediment deposition in reservoir, among which delta profile is the most general one. Based on the nonequilibrium transportation equation, it is verified in theory that the delta formation is the tendency of reservoir sedimentatiom. A general mathematical model of reservoir sedimentation and river fluvial established by the author is used to simulate the entire process of the formation and development of delta, thus its characteristics and mechanism involved are clearly exposed. A series of theoretical results are presented, including:1. deposit percentage of delta, which is dependent on the grade curve of suspended load during sedimentation; 2. equations of gradient and longitudinal profile of top-slope of delta. The former belongs to the second order polynomial and the later to the third order polynomial, both of which are concave-up curves, meaning that the curve slope is decreased along the flow direction and the top-slope of delta is not a linear curve as shown In some previous papers; 3. expressions of water level upon the delta top-slope and the slope of water level, which axe also third order and the seceond order polynomials respectively and the concave-up curves as well. But the decreasing of water level is smaller than that of the delta bed and the water depth is increased along the flow direction; 4. expression of the length of the front slope, the end of which is the location where the deposit percentage is just equal to that of the delta; 5. deposit percentage of the top-slope, which is derived from the calculation of profile; 6. variation of size distribution of suspended load at each section of the delta and the grade curves of deposit at the front and top-slope respectively. All these theoretical results are verified by the measured data at Guanting Reservoir, a typical depositional deltaic one, showing a satisfactory agreement.
Key words: