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1 2 3 4 5 6 8 10 YCl YC2 BAD AN CPC IRe SSP 'IDZAM GR Beconi o + o + o + o + o + o 1 o + 5 o + Regular erodible left bank Station of rigid left bank in ft or m, to the left - of which channel is non-erodible. Regular erodible right bank Station of rigid right bank, to the right of which channel is non-erodible Straight channel with zero curvature Radius of curvature at channel centerline in ft or m. Center of radius is on sane side of channel where the station (Y-coordinate) starts. Radius of curvature at channel centerline in ft or m. Center of radius is on opposite side of zero station. Roughness of this section is the same as that given in Field 7 of Gl record. Manning I S "n" value for this section Center of thalweg coincides with channel invert at this section. Station (Y-coordinate) of the thalweg in ft or m Regular erodible cross section Rigid or non-erodible cross section such as drop structure or road crossing. Up to 10 such sections are allowed in the study reach. Slope of bank protection is the same as that given in Field 2 of G3 record. Slope of bank protection at this section in SSP horizontal units on 1 vertical unit. Use 0.05 for vertical bank. Slope of rigid bank is defined by the GR coordina- tes. Erodible bed layer at this section is defined by 'IDZAMA in Field 1 of the G4 record. Thickness of erodible bed layer in ft or m. This record specifies the elevation and station of each point for a digitized cross section; it is required for each Xl record. 31