FLOOD08565

• County: Statewide
• Basin: Statewide
• Title: HEC-2 Water Surface Profiles
• Date: 8/1/1979
• Prepared For: US
• Prepared By: US Army Corps of Engineers
• Floodplain - Doc Type: Educational/Technical/Reference Information

J4: Optional Job Card. This job card is used on the first pro-
file to request punched cards for Modified Puls routing in the format
required by computer program HEC-l.

J5: Optional Card. This job card is used to provide various levels
of suppression of the cross section data and summary tables. This card
is used with job cards for the first profile.

J6: Optional Job Card. This job card is used to select various
equations for computation of friction loss and to provide for transfer
of control of diSk/tape output units to system control cards.

EJ: End of Job Card. This required job control card follows data
for the last cross section to be read. It serves to terminate the
reading of data cards. A single EJ card is required for both single
or multiple profile (job) runs.

ER: End of Run Card. This required job control card preceeded
by three blank cards terminates the execution of the program. The
three blank cards and the ER card follow the EJ card of a single job
run or follow the last J2 card of a multiple job run.

7. CHANGE CARDS: NC, NH, NV, QT, ET & CI

These cards provide options to initialize and change values related
to Manning's 'n', discharge, cross section modification by encroachment,
and channel improvement options. When initial values are changed they
remain changed for all subsequent cross sections until another change
card is encountered. Change cards, NC - ET become effective at the cross
section (Xl card) immediately following. The CI card is input in the data
set fOllowing the Xl card where the channel improvement option is to be
initialized or changed.

NC: Mannin 's 'n' Descri tion. This card is required to initialize
'n' values and transition shock loss coefficients prior to data for
the first cross section. Subsequent NC cards may be utilized to permanently
change values at any cross section within the job.

NH: Horizontal Descriptfon of Manning's 'n'. This optional card can
be utilized to specify up to twenty 'n' values that vary with horizontal
distance across the cross section. Normally NH cards apply to a single
cross section and 'n' values should be redefined by either another set
of NH cards or by an NC card for subsequent cross sections.

NV: Vertical Description of Manning's 'n'. This optional card may
be used to specify channel 'n' values that vary with elevation.

QT: Discharge Table. This optional card allows the user to input
a table of up to nineteen discharges for multiple profile runs. Subse-
quent QT cards may be used to change discharge values at any cross sec-
tion. The discharge value to be used for a particular run is specified
by a variable on the Jl card.

ET: Encroachment Table. This optional card allows the user to
input a table of up to nine encroachment specifications for multiple
profile runs. The encroachment specification to be utilized for a
particular profile corresponds with the field of the QT card selected
by the Jl card.

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