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    Revision of the Late Paleozoic lithostratigraphy in the Bogexi area, Batang County, western Sichuan province
    Regional Geology of China (1999)
    You Zai
    On the basis of a detailed study of the Late Paleozoic section in the Bogexi area, Batang county, western Sichuan, six lithostratigraphic formations may be recognized in the study area. According to the conodont and fusulinid fossils, their ages are determined to be Devonian Permian. The stratigraphic sequences in the area are successively (in ascending order) as follows: the Yazigou Formation , which uses the name of the Muli district; the Bogexi Formation and Longba Formation ,whose connotations have been revised; the Duogei Formation and Duogei Formation , which is newly established. The Late Paleozoic lithostratigraphic system in the Taocheng has been preliminarily set up and perfected.
    Lithostratigraphy
    Conodont
    Devonian
    Section (typography)
    Citations (0)
    Analysis of navigation hindering characteristics and regulation principle of shoal group reaches of mountain rivers
    Hydro-Science and Engineering (2013)
    XU Guang-xiang
    The shoal group reach distributes widely in the southwest mountainous river.Compared with a single shoal reach,the navigation environment of the shoal group reach,which consists of a lot of shoals or rapids sections close to each other,is complex and more difficult to be regulated.By analyzing the sketch features,navigation hindering characteristics and regulation experiences of different shoal group reaches,the navigation hindering features and the general regulation principles which should be followed are summarized.Though the navigation hindering characteristics of each shoal section are different,the characteristics of the shoal group reach are generally associated with the river regime characteristics of the long reach where the shoal group exists.The regulation of the complex shoal group should conform to the river regime,consider the influence of adjacent shoal section,and focus on improving the navigation environment of the controlled shoal section.For sand pebble shoal group,the sediment transport balance of shoal reaches after regulation should be considered too.
    Shoal
    Section (typography)
    Citations (0)