TY - Journal of Yangtze River Scientific Research Institute A1 - HUANG Chao-xuan  T1 - A New Analytical Method of Computing Water Surface Curve of Constant and Gradually Varied Flow in Trapezoidal Channel Y1 - 2012-11-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 46 EP - 49 VL - 29 IS - 11 UR - http://ckyyb.crsri.cn N1 - 10.3969/j.issn.1001-5485.2012.11.010 ER -