Lantsang river source is located in the north Tanggula Mountain of Qinghai-Tibet Plateau, nearby the south source of the Yangtze River, with hardly any human activities. In order to gradually recognize Lantsang river geomorphology and obtain basic data of geomorphology evolution of river, as well as scouring and silting process of riverbed, we carry out in-situ investigation and collect data and images to judge the river pattern of Moyun reach in Zhanaqu river, west source of Lantsang river. The results show that, boundary constraints of Moyun reach are weak with poor stability of riverbed; furthermore, in the classification system of river pattern which consists of 4 kinds, namely straight, meandering, anabranching, and wandering, we uniformly determine the reach is wandering type by using different discriminants; meanwhile, in the classification system of river pattern with 3 kinds, including straight, meandering and braided, we regard the reach as braided type; finally, according to domestic river characteristics and current classification system, we conclude that Moyun reach is wandering type. Field observation data and river pattern discrimination offer reference for further research on the river geomorphology of Lantsang river source.
Key words
Lantsang river /
river source /
river geomorphology /
river pattern discrimination /
wandering river pattern
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 长江科学院. 2014年江源科学考察报告[R].武汉:长江科学院,2014.
[2] 李志威. 三江源河床演变与湿地退化机制研究[D].北京:清华大学,2013.
[3] TWIDALE C R. River Patterns and Their Meaning[J]. Earth-Science Review, 2004, 67(3-4): 159-218.
[4] BEECHIE T J, LIERMANN M, POLLOCK M M, et al. Channel Pattern and River-floodplain Dynamics in Forested Mountain River Systems[J]. Geomorphology , 2006, 78 (1-2):124-141.
[5] LEOPOLD L B, WOLMAN M G. River Channel Patterns: Braided, Meandering and Straight[R]. Washington, USA: United States Government Printing Office,1957: 39-85.
[6] 钱 宁,张 仁,周志德.河床演变学[M].北京:科学出版社,1987.
[7] 谢鉴衡.河床演变及治理[M].北京:水利电力出版社,1990:4-119.
[8] NANSON G C. Anabranching Rivers: Their Cause, Character and Classification[J].Earth Surface Processes and Landforms,1996,21(3):217-239.
[9] LEWIN J, BREWER P A. Predicting Channel Patterns[J]. Geomorphology, 2001,40(3-4):329-339.
[10]谢鉴衡.江河演变与治理研究[M].武汉:武汉大学出版社,2004.
[11]张红武,刘海凌,江恩惠,等.小浪底水库拦沙期下游游荡性河段演变趋势研究[J].人民黄河,1998,20(11):5-7.
[12]张俊华,王严平,丁 易.冲积河流河型成因的研究[C]∥河流模拟理论与实践论文集.武汉:武汉水利电力大学出版社,1998.
[13]周宜林,唐洪武. 冲积河流河床稳定性综合指标[J].长江科学院院报,2005,22(1):16-20.
[14]肖 毅,邵学军,周建银.基于尖点突变的河型稳定性判定方法[J].水科学进展,2012,(3):179-185.
[15]许炯心.砂质河床与砾石河床的河型判别研究[J].水利学报,2002,(10):14-20.
[16]尹学良. 河型成因研究[J].水利学报,1993,(4): 1-11.
[17]PARKER G. On the Cause and Characteristic Scales of Meandering and Braiding in Rivers[J].Journal of Fluid Mechanism, 1976,76(3):457-480.
[18]VAN DEN BERG J H. Prediction of Alluvial Channel Pattern of Perennial Rivers[J]. Geomorphology, 1995, (12):259-279.
[19]LI Zhi-wei, WANG Zhao-yin, PAN Bao-zhu, et al .Analysis of Controls upon Channel Planform at the First Great Bend of the Upper Yellow River, Qinghai-Tibet Plateau[J]. Journal of Geographical Science, 2013, 23(5):833-848.
[20]YU Guo-an, LIU Le, LI Zhi-wei, et al. Fluvial Diversity in Relation to Valley Setting in the Source Region of the Yangtze and Yellow Rivers[J]. Journal of Geographical Science, 2013,25(3):817-832.
PDF(2137 KB)
