水利水电科技进展2017，Vol.37Issue(6)：19-24,94,7.DOI:10.3880/j.issn.1006-7647.2017.06.004
若尔盖盆地黑河的牛轭湖沿程变化与形态特征
Analysis on morphological features of oxbow lakes along Heihe River in Zoige Basin
摘要
Abstract
Heihe River is a typical meandering river located in the Zoige Basin,which is an important tributary of the Yellow River source.Many oxbow lakes developed along Heihe River due to natural cutoffs,which record the cutoff frequencies and old channel morphologies.By processing the remote sensing images of SPOT (1990 and 2000) and Google Earth (2000-2014),216 oxbow lakes in the mainstream and three tributaries (i.e.,Gequ,Maiqu,and Haqu Rivers) along the river channel were identified and the morphological parameters of the meander belts were further defined and analyzed.The results show that the width of the meander belt along the channel increases with a trend of "quick-slow-quick" and moreover most of the oxbow lakes developed in the middle reach.Due to the impact of sediment deposition in the lower reach,the formation time of Ω-shape oxbow lakes is much less than that of U-shape and C-shape oxbow lakes in the middle and upper reaches.Only two cutoffs occurred during 1990-2013 and a Ω-shape and U-shape oxbow lake gradually formed,indicating that the formation rate of oxbow lakes in the Zoige basin is slow.关键词
牛轭湖/弯曲河流/形态特征/自然裁弯/黑河/若尔盖盆地Key words
oxbow lake/meandering river/morphological features/natural meander cutoff/Heihe River/Zoige Basin分类
建筑与水利引用本文复制引用
李想,李志威,胡旭跃,田世民..若尔盖盆地黑河的牛轭湖沿程变化与形态特征[J].水利水电科技进展,2017,37(6):19-24,94,7.基金项目
水利部黄河泥沙重点实验室开放课题基金(2017005) （2017005）
黄河水利科学研究院院所长基金(HKY-JBYW-2016-03) （HKY-JBYW-2016-03）
湖南省研究生科研创新项目(CX2017B477) （CX2017B477）
