*                 Enter Channel/Pipe data on line G1.

*

*        Channel/pipe data: one line per channel/pipe (if none, leave out).

*  Maximum number of channels or pipes plus inlets is defined by parameter

*  NG on the 'TAPES.INC' common.  An inlet is any location identified by NGTO

*  on a G1 or H1 line that is not listed in group G1 as a channel or pipe.

*  All inlets (and only these inlets) are saved on the output interface

*  file, if JOUT > 0.

*

*  Note:  Variables with asterisks can be modified using the Default/Ratio

*  option.  A -1 entered for NAMEG means non-zero entries for data with

*  asterisks are ratios, by which subsequent entries for those parameters

*  will be multiplied.  E.g., enter a ratio of 1.2 to increase all

*  parameters by 20%.  A -2 entered for NAMEG means non-zero entries for

*  data with asterisks are default values.  If a data line has a zero for

*  a parameter for which a default value has been defined, the parameter

*  is assigned this value.  As many ratio and default lines may be inserted

*  as desired within a data group.  Of course, if the alphanumeric option

*  is being used, the -1 or -2 should be enclosed in single quotes, e.g.,

*  '-1' or '-2'.

*============================================================================

*       G1 Line      :

*        NAMEG       :  Channel/pipe number or name.

*        NGTO        :  Channel/pipe or inlet number or name for drainage.

*                       Note, NGTO must be different than NAMEG. 

*        NPG=NP      :  Type of channel or pipe.

*                       = 1 for trapezoidal channel,

*                       = 2 for circular pipe,

*                       = 3 for dummy channel/pipe, inflow = outflow,

*                       = 4 for parabolic channel,

*                       = 5 for trapezoidal channel with weir or orifice

*                          (follow with G2 data group),

*                       = 6 for circular pipe with weir or orifice

*                          (follow with G2 data group), and

*                       = 7 for parabolic channel with weir or orifice

*                          (follow with G2 data group).

*============================================================================

*           The following parameters are not used if NP = 3.

*============================================================================

*        GWIDTH*   :  Bottom width of trapezoidal channel, diameter.

*                     of pipe, or top width of parabolic channel, ft [m].

*        GLEN*     :  Length of channel/pipe, ft [m].

*        G3*       :  Invert slope, ft/ft (dimensionless).

*        GS1       :  Left-hand side slope, ft/ft.  (Slope = horiz./vert.).

*        GS2       :  Right-hand side slope, ft/ft.

*        G6*       :  Manning's roughness coefficient.

*        DFULL*    :  Depth of channel when full, ft [m].

*                     (N.R. if NP equals 2, 3, or 6)

*        GDEPTH*   :  Starting depth of pipe/channel, ft [m].  Note: 

*                     cannot have GDEPTH > maximum channel/pipe depth. 

*============================================================================

*   CHANNEL 20 - CIRCULAR PIPE

*   CHANNEL 30 - TRAPEZOIDAL CHANNEL

*   CHANNEL  1 - PARABOLIC CHANNEL

*   CHANNEL  2 - LAKE (PARABOLIC) CHANNEL WITH WEIR

*  NAMEG NGTO NPG  GWIDTH GLEN  G3    GS1   GS2  G6  DFULL  GDEPTH

*G1 -1    0    0    0      0.8   0    0     0    0     0     0

*G1 -2    0    0    0       0    0    0     0   0.020  0     0

G1  20    2    2    3.0   1000. 0.01 0.00  0.00 0.020  0.0  0.0

G1  30    2    1   10.0    500. 0.01 5.00  4.00 0.030  8.0  0.0

G1  1     2    4   20.0   5000. 0.01 0.00  0.00 0.020 10.0  0.0

*Note, initial water level below weir crest.

G1  2     3    7  500.0   2000. 0.01 0.00  0.00 0.020 10.0  2.5

*============================================================================

*                Enter control structure data on line G2.

*

*  Note:  A G2 data group must follow a G1 line if NPG is greater than 4.

*  Then continue with further G1 lines and/or G1-G2 pairs.

*============================================================================

*       G2 Line    :

*        WTYPE     :  Type of weir/orifice,

*                     = 0, Broad or narrow crested weir,

*                     = 1, V-notched weir, or

*                     = 2, Orifice.

*        WELEV     :  Elevation of weir (bottom of notch for V-notch) or

*                     of orifice centerline, referenced to bottom of

*                     channel/pipe, ft [m].

*        WDIS      :  Discharge coefficient of the weir or orifice

*                     (parameter C in equations 4-5, 4-6, 4-7).  Units

*                     for equations 4-5 or 4-6: ft1/2/sec [m1/2/sec].

*                     Parameter Cd in equation 4-7 is dimensionless.

*        SPILL     :  Weir length (e.g., width of spillway) for a broad

*                     or narrow crested weir, ft [m].  The angle (degrees)

*                     of the notch for a V-notch weir.  The cross

*                     sectional area of the outflow orifice, ft2 [m2].

*============================================================================

* WTYPE WELEV  WDIS SPILL

G2  0    3.0    3.3  10.0

*============================================================================