TY - Journal of Yangtze River Scientific Research Institute A1 - TENG Kai T1 - The Approximate Formula for Normal Water Depth of Semi-Cubic Parabolic Channels Y1 - 2012-12-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 30 EP - 33 VL - 29 IS - 12 UR - http://ckyyb.crsri.cn N1 - 10.3969/j.issn.1001-5485.2012.12.007 ER -