人民黄河Issue(2)：19-23,5.DOI:10.3969/j.issn.1000-1379.2015.02.006
黄河宁夏段水沙变化特点及临界来沙系数研究
Research on the Flow and Sediment Conditions and Critical Incoming Sediment Coefficient in Ningxia Section of Yellow River
摘要
Abstract
By analyzing the historical hydrology and sediment data in recent 60 years of Xiaheyan,Qingtongxia and Shizuishan hydrologic sta-tions,we studied the flow and sediment process and the river’s erosion and deposition using the statistic analyzing method. We highlighted the study of the influence of the operation of Longyangxia and Liujiaxia. On this basis,from the relations of sediment transport rate and flow discharge,flood season and non-flood season’s sediment and water amount,we explored the overall and size distinguished critical incoming sediment coefficient of QS section(shortly for the section from Qingtongxia to Shizuishan). The result shows that the joint regulation of Longy-angxia and Liujiaxia has a great influence on the flow and sediment in Ningxia section. The incoming sediment coefficient of QS sections is 0. 002 36 kg·s/m6 ,and it’s different for coarse,medium and fine sand. Among the three size- distinguished critical incoming sediment co-efficients,the fine sand is the largest and the coarse and medium sand are similar,meaning that transporting fine sand requires the least flow discharge and the others are almost the same.关键词
水沙条件/冲淤量/来沙系数/分粒径/宁夏段/黄河Key words
flow and sediment conditions/erosion and deposit/incoming sediment coefficient/Ningxia section/Yellow River分类
建筑与水利引用本文复制引用
凌虹霞,王新军,王永强,钟德钰,张红武..黄河宁夏段水沙变化特点及临界来沙系数研究[J].人民黄河,2015,(2):19-23,5.基金项目
国家自然科学基金资助项目（51379102）；国家重点基础研究发展计划项目（2011CB403300）。 （）
