Meanders of the Jialing River in China: Morphology and formation  

作　　者：ZHANG Bin AI NanShan HUANG ZhengWen YI ChengBo QIN FaCao 

机构地区：[1]School of Architecture and Environment, Sichuan University, Chengdu 610065, China [2]College of Land and Resources, China West Normal University, Nanchong 637002, China

出　　处：《Chinese Science Bulletin》2008年第2期267-281,共15页

基　　金：State Key Development Program for Basic Research of China (Grant No. 2007CB407206);Planning Projects of National Science and Technology of China (Grant No. 2006BAC01A11)

摘　　要：As a fundamental category of river system, comparisons in diverse regions and types with quantitative parameters on meander morphology will help to distinguish different characteristics and approach formations and evolutions. It also can provide scientific basis of geomorphology for their protections and exploitation of the meander resources. Based on the images of Google Earth, meanders’ parame- ters are proposed and then measured and calculated. The result suggests that incised meanders in the Jialing River are among the most complex, irregular and sinuous channels. Special river gradient, geological structures, strata and lithology, backwater effect of landform are key factors to shape me- anders of the Jialing River. The evolution of meander in the Jialing River obeys the principle of mini- mum-maximum energy dissipation. Easy acquisitions of remote sensing data make regional and global comparisons possible, and then the differences of formations can be explored. The morphology can probably provide an evidence of antecedent river and demonstrate the channel incisions and crustal uplifts. Meander core in Chinese is named after the isolated hills in the Jialing River. The incised me- ander is a kind of resource and needs to be protected.As a fundamental category of river system, comparisons in diverse regions and types with quantitative parameters on meander morphology will help to distinguish different characteristics and approach formations and evolutions. It also can provide scientific basis of geomorphology for their protections and exploitation of the meander resources. Based on the images of Google Earth, meanders＇ parameters are proposed and then measured and calculated. The result suggests that incised meanders in the Jialing River are among the most complex, irregular and sinuous channels. Special river gradient, geological structures, strata and lithology, backwater effect of landform are key factors to shape meanders of the Jialing River. The evolution of meander in the Jialing River obeys the principle of minimum-maximum energy dissipation. Easy acquisitions of remote sensing data make regional and global comparisons possible, and then the differences of formations can be explored. The morphology can probably provide an evidence of antecedent river and demonstrate the channel incisions and crustal uplifts. Meander core in Chinese is named after the isolated hills in the Jialing River. The incised meander is a kind of resource and needs to be protected.

关 键 词：曲流 形态学 分形尺寸 嘉陵江 

分 类 号：P942.77[天文地球—自然地理学]